Java developer jobs in Virginia - 4,306 jobs

Job ID 2025-12918 # of Openings 2 Category Engineering Benefit Type Salaried High Fringe/Full-Time LMI is actively seeking a dynamic, experienced Mid-Level Back-End Developer with a strong background in modern . This role involves translating design concepts into responsive, high-performance software applications. This position can be located in Colorado Springs, CO or the Northern VA metro area. LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors-helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value. Responsibilities Develop and maintain server-side logic by writing code that powers the application's functionality, handles user requests, and manages data. Create APIs that allow different parts of the application, or different applications, to communicate with each other. Design database schemas, write queries, and ensure data integrity and security. Ensure the application can handle a growing number of users and data efficiently. Work closely with front-end developers to integrate the back-end functionality with the user interface. Implemen security measures to protect sensitive data and prevent unauthorized access. Participate in code reviews, debug developed code, and stay current with software development trends. Collaborate with cross-functional teams, develop reusable code components, and ensure application accessibility. Actively participate in Integrated Product Teams (IPT's) and other engineering working groups to review, assess, and mature engineering artifacts such as concept of operations (CONOPs), system architecture, system behavior, system interfaces, functional allocation, Interface Control Documents/Descriptions (ICDs), and data models. Provide meeting coordination, technical expertise, and software development to assist the customer decision makers. Qualifications Required: B.S. in Computer Science, Computer Engineering, or equivalent. 5 - 7 years experience as a Back-End Developer with a portfolio, and proficiency in modern object-oriented programming languages such as Python, Java, C++, Node.js, or Ruby. Experience with both SQL (e.g., MySQL, PostgreSQL) and NoSQL (e.g., MongoDB) databases. Familiarity with back-end frameworks liks Django, Flask, Spring, or Express.js. Experience with cloud platforms like AWS, Azure, or Google Cloud. Experience with efficient data storage and retrieval. Strong, demonstrable understanding of modern design and coding principles and practices. Familiarity with version control systems (e.g., Git). Knowledge of software performance optimization. Strong problem-solving skills. Excellent communication and teamwork abilities. Desired: Experience with testing frameworks. Knowledge of security practices. Active TS/SCI. Candidate must be eligible to obtain a TS/SCI. Target salary range: $99,000.00 - $171,000.00. Final compensation will be determined by a variety of factors including but not limited to your skills, experience, education, and/or certifications. LMI is an Equal Opportunity Employer. LMI is committed to the fair treatment of all and to our policy of providing applicants and employees with equal employment opportunities. LMI recruits, hires, trains, and promotes people without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, pregnancy, disability, age, protected veteran status, citizenship status, genetic information, or any other characteristic protected by applicable federal, state, or local law. If you are a person with a disability needing assistance with the application process, please contact Colorado Residents: In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information. Need help finding the right job? We can recommend jobs specifically for you! Click here to get started.

08-Jan-2026 Principal AI Applications Engineer US Herndon, VA 10558BR As the recognized global standard for project-based businesses, Deltek delivers software and information solutions to help organizations achieve their purpose. Our market leadership stems from the work of our diverse employees who are united by a passion for learning, growing and making a difference. At Deltek, we take immense pride in creating a balanced, values-driven environment, where every employee feels included and empowered to do their best work. Our employees put our core values into action daily, creating a one-of-a-kind culture that has been recognized globally. Thanks to our incredible team, Deltek has been named one of America's Best Midsize Employers by Forbes, a Best Place to Work by Glassdoor, a Top Workplace by The Washington Post and a Best Place to Work in Asia by World HRD Congress. ************** Business Summary The Deltek Engineering and Technology team builds best-in-class solutions to delight customers and meet their business needs. We are laser-focused on software design, development, innovation and quality. Our team of experts has the talent, skills and values to deliver products and services that are easy to use, reliable, sustainable and competitive. If you're looking for a safe environment where ideas are welcome, growth is supported and questions are encouraged - consider joining us as we explore the limitless opportunities of the software industry. Position Responsibilities About the Role We're building an enterprise ERP system from scratch where AI isn't a feature-it's the foundation. Join Deltek's Engineering and Technology team to create the first truly AI-native SMB ERP. Users will chat with their system instead of clicking through forms. Intelligent agents will handle routine tasks autonomously. And you'll use AI to write better code faster. This is a greenfield project. No legacy constraints. No technical debt. Just the opportunity to reimagine what enterprise software can be when designed for AI from day one. As a principal engineer, you'll solve the hardest technical problems, create reference implementations that set the standard, and mentor engineers in a development paradigm that's still emerging. You'll prove that AI-native enterprise software isn't just possible-it's superior. Key Responsibilities Implement the most technically challenging features of the AI-powered ERP platform, serving as the go-to expert for complex integration and performance challenges Develop reference implementations and coding patterns that other engineers follow when building AI-enhanced features Implement sophisticated prompt engineering and LLM integration solutions, ensuring security, performance, and cost-effectiveness Build production-ready ML integration code utilizing infrastructure provided by the dedicated AI/ML infrastructure team Provide deep technical expertise on critical implementation challenges affecting multiple teams, offering solutions based on extensive hands-on experience Collaborate with architects to validate technical approaches through proof-of-concepts and prototypes Champion code quality, comprehensive testing, security best practices, and operational excellence Identify and resolve complex technical debt that impacts multiple teams Serve as technical advisor to architects and engineering leadership on implementation feasibility and development best practices Mentor and develop senior engineers, elevating implementation capabilities across the engineering organization Drive innovation through hands-on proof-of-concepts exploring novel approaches to ERP challenges Qualifications Education & Experience Bachelor's or Master's degree in Computer Science, Engineering, Mathematics, Data Science, or related field 10+ years of professional software engineering experience with extensive hands-on AI/ML systems implementation Demonstrated history of technical leadership through exceptional implementation quality on large-scale, business-critical systems Proven track record of solving complex implementation challenges that enabled significant business outcomes Experience providing technical guidance and mentoring senior engineers Deep expertise in implementing enterprise software and AI/ML integrations with production deployments at scale Technical Skills Programming Languages: Master-level expertise in Java, Python, and ability to work effectively in multiple languages Implementation Expertise: Deep expertise in implementing distributed systems, microservices, event-driven patterns, and domain-driven design Database: Expert-level implementation skills with PostgreSQL including performance optimization, complex query development, and multi-tenant data patterns AI/ML Integration: Comprehensive expertise in implementing LLM systems, prompt engineering at scale, RAG architectures, and model integration Development Best Practices: Experience establishing coding standards, testing patterns, and development workflows that improve team productivity Cloud & Infrastructure: Expert knowledge of implementing cloud solutions and working with managed services across AWS/Azure/OCI API & Integration: Deep expertise in implementing robust APIs, integration patterns, and extensible features Observability & Reliability: Expert in leveraging comprehensive monitoring, logging, and error handling Security: Strong understanding of implementing security controls, authentication/authorization, and data protection Leadership & Communication: Exceptional ability to communicate complex technical concepts and influence development approaches through collaboration Pragmatic Thinking: Ability to balance code quality with delivery timelines, provide practical technical guidance, and align development work with business goals AI-First Mindset This role requires embracing an AI-first approach where GenAI and agentic AI tools are essential collaborators, not optional supplements. We expect team members who naturally think in AI-enhanced workflows and proactively integrate intelligent automation to solve ERP development challenges more efficiently. The ideal candidate has strong interest in prompt engineering techniques and conversational AI systems, with understanding of how to craft effective prompts for business contexts. You should be curious about natural language processing and how AI enhances user experiences, along with basic awareness of AI ethics and prompt safety considerations. We're looking for someone who approaches ERP feature development by first asking: "How can AI help me build this functionality faster and better?" This includes being comfortable with rapid AI tool evolution, eager to experiment with new AI capabilities for prompt engineering and ERP optimization, and committed to sharing AI-enhanced approaches with the team. We value those who apply prompt engineering to solve real-world ERP business problems and see AI as a productivity multiplier for strategic development decisions, rather than a replacement for human expertise. Compensation Info The U.S. salary range for this position is $91,000.00-$160,750.00. This range is subject to change as Deltek takes a number of factors into consideration when determining individual base pay, such as location, job-related knowledge, skills and experience. Certain roles are eligible for additional rewards, including incentive compensation and equity. Benefits and perks listed here may vary depending on the nature of employment with Deltek. Employees have access to healthcare benefits, a 401(k) plan and company match, paid vacation time and holidays, well-living programs, short-term and long-term disability coverage, basic life insurance and tuition reimbursement. Position Type FT Travel Requirements 10% Compliance Requirements Certain roles may have additional privacy, security and compliance requirements to the extent they support Costpoint GCCM or similar product offerings. EEO Statement Deltek, Inc. is an Equal Opportunity / Affirmative Action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, or protected veteran status. E-Verify Statement Deltek, Inc., utilizes the E-Verify program with every potential new hire. This makes it possible for us to make certain that every employee who works for Deltek is eligible to work in the United States. To learn more about E-Verify you can call or visit their website by clicking the logo below. E-Verify is a registered trademark of the United States Department of Homeland Security. Applicant Privacy Notice Deltek is committed to the protection and promotion of your privacy. In connection with your application for employment with us at Deltek, it is necessary for us to collect, store and use information about you ("Personal Data") to administer and evaluate your application. We are the "controller" of the Personal Data you provide us and will process any such Personal Data in accordance with applicable law and the statements contained in this Employment Candidate Privacy Notice. Additionally, we have not sold and do not sell Personal Data you provide to us through the job application process.

Title : Backend Developer (On Site) In person Interview Employment Type: Contract/Fulltime Note : ONLY USC, GC, H4 EAD Job Description Our Client is seeking a seasoned Backend Developer to support a large-scale application modernization initiative. This role will focus on refactoring legacy systems into a modern, cloud-native backend using Java, Python, and AWS services, with an emphasis on scalability, event-driven design, and clean architecture. Key Responsibilities Support refactoring and modernization of a legacy Collateral application, transitioning from PL/SQL and SAS to a target-state Java and Python-based architecture Design and develop scalable backend services using Java (Spring ecosystem) and Python Build and support event-driven architectures using AWS Kinesis, SNS, and SQS Develop and maintain serverless components leveraging AWS Lambda Work with AWS data services including RDS, DynamoDB, and Glue to support backend integrations Implement and manage cloud infrastructure using Terraform (Infrastructure as Code) Collaborate closely with product owners, architects, and QA teams during design, development, and testing phases Ensure performance, reliability, and security best practices across backend services Participate in CI/CD pipelines and follow DevOps-aligned development practices Support production stability, defect resolution, and performance tuning as needed Required Skills & Experience 10+ years of Java backend development experience 2+ years of hands-on Python development Strong experience with AWS cloud services, including: Kinesis, SNS, SQS Lambda RDS, DynamoDB, Glue Hands-on experience with Terraform Experience modernizing or refactoring legacy applications Strong understanding of backend architecture, data flows, and integration patterns

Responsibilities: • Collaborate in team ceremonies with engineering team daily. • Work with engineering lead and technical lead on team to drive design and development of web application enhancements. • Engage with integration partners and stakeholder teams to gather requirements and share progress. Key Requirements and Technology Experience: • Key Skills: Java, AWS, Golang, MongoDB or DynamoDB • 3 years of Java/Spring and Go experience • 2 years of AWS experience • 2 years of DocumentDB with Mongo flavor & DynamoDB as backend DB • Client experience a plus but not required • Experience with autonomous delivery across the stack • Strong team player and collaboration inside development team and outside • Quick learner of new technologies and concepts Our client is a leading Financial Industry, and we are currently interviewing to fill this and other similar contract positions. If you are interested in this position, please apply online for immediate consideration.

Sr PowerBuilder Developer Project: Project Lighthouse backfill to maintain IRMS legacy systems and develop interfaces between GentTax and IRMS systems during the modernization period to support all four rollouts Highly Preferred Skills: Technical knowledge in designing, developing and maintaining TAX processing and revenue management systems Product knowledge of the IRMS system and/or functional knowledge. Required Skills Strong written and verbal communication skills. Self-motivated and able to work well in a team. Interact with a multi-disciplined team to clarify, analyze, and assess requirements- Work independently and collaboratively on a multi-disciplined project team in an Agile development environment. Contribute to detailed design and architectural discussions as well as customer requirements sessions to support the implementation of PowerBuilder Applications Required Skills to be qualified for this role: Hands-on experience developing PowerBuilder applications using PowerBuilder 12.5 or higher Design and develop clear and maintainable code Team Foundation (Azure DevOps) Server and its use to support version control, and application lifecycle management Experience working with Agile/Scrum project management methodologies Able to work independently as well as in a team environment Pay attention to details and have a result-driven mindset Excellent Verbal and written communication skills. Able to coordinate with other application development teams, team leads business analysts. Hands-on experience using Relational Databases, such as Oracle 19C or higher or MySQL or similar Design and develop clear and maintainable code Product knowledge of the IRMS system and/or functional knowledge. - Highly Desired Must be either a US Citizen or a Green Card Holder

Perform all tasks appropriate to role, including technical analysis, database design, prototyping, coding and unit testing of applications with high quality deliverables. Assist with application architecture design. Responsible for writing technical documentation as necessary by the UNOS Development Methodology and Standards. Responsible for the security, quality, and performance of developed applications. Apply and acquire business and product knowledge in the performance of assigned projects. Provide direct input into the on-going improvement of standards and processes. Incorporate innovative ideas and approaches to the software development team. Key Responsibilities Full stack developer with an emphasis on Azure/API/Angular/React. Write application and database code based on business needs, user stories, or architectural requirements using established coding standards. Participate in the review of business epics and stories. Validate code against business and architectural requirements. Create and test prototypes. Perform application unit testing. Participate in peer test and code reviews. Troubleshoot applications and resolve defects. Work within the UNOS agile framework. Prioritize and execute tasks. Communicate ideas in both technical and user-friendly language. Update and maintain product documentation. Escalate issues and impediments in a timely manner. Work within established framework and processes. Provide constructive feedback to team members at all levels of the organization. Participate/Lead Development COPs. Participate in SE COPs, research committees, and subcommittees. Design, build, and test applications and database solutions. Assist the release engineer with implementation plan development and execution. Provide on call support. Utilize skills in data analysis, data verification, and problem solving. Provide accurate breakdown tasks and estimates for coding and development unit testing efforts. Mentor team members. Assist with technical interviews and talent recruitment. Other duties as directed. Minimum Requirements 2 years of software development experience required Critical Skills NET C# API development experience required. MVC/pattern proficiency required Experience with native application development (Kotlin, Java, ObjectiveC, Swift, etc.) a plus. Strong knowledge of team-oriented and collaborative working environments. Proven ability in relational database design and development principles. Understanding of Agile methodology principles preferred. Software configuration management skills desired. Continuous integration and deployment knowledge is a plus. Mobile development skills preferred. Active participation in the technical community is desired. Additional Skills & Qualifications Must have demonstrated proficiency in an object oriented programming language Must have a demonstrated knowledge of software design and development principles UI/UX principles required. Responsive and/or adaptive design knowledge required. Excellent problem-solving skills. Excellent listening and feedback skills. Exceptional interpersonal and consensus-building skills. Excellent verbal, telephone, and written communication skills. Education This position requires a four-year degree in Computer Science or related field, or 5 years of related professional IT experience. Physical Requirements General office demands Prolonged periods of sitting at a desk and working on a computer. Frequent reaching, handling, and fine manipulation for using office equipment, filing, and managing paperwork. Manual dexterity sufficient to operate a keyboard, mouse, and other office tools. Occasional standing, walking, and bending. Ability to lift up to 10-20 pounds occasionally. Vision abilities required include close vision for computer work and reading documents.

Argo Group International Holdings, Inc.and American National, US based specialty P&C companies, (together known as BP&C, Inc.) are wholly owned subsidiaries of Brookfield Wealth Solutions, Ltd. ("BWS"), a New York and Toronto-listed public company. BWS is a leading wealth solutions provider, focused on securing the financial futures of individuals and institutions through a range of wealth protection and retirement services, and tailored capital solutions. Job Description We are seeking a skilled Full-Stack Developer to lead and perform web application development. You will design, implement, and maintain RESTful APIs using Nest.js, Java 8, and Enterprise Java Beans (EJB). You will develop and maintain web applications using modern JavaScript frameworks (Angular, TypeScript), architect and optimize SQL queries and stored procedures, and configure and manage CI/CD pipelines using Azure DevOps (ADO) and Git. Additionally, you will implement containerization solutions using Docker or Kubernetes, apply secure coding practices, and conduct unit and integration testing. What You Will Do: Lead web application development projects Design and maintain RESTful APIs Develop web applications with Angular and TypeScript Optimize SQL queries and manage databases Configure CI/CD pipelines with Azure DevOps and Git Implement containerization with Docker or Kubernetes Ensure secure coding practices and conduct testing Collaborate with business representatives and Agile teams Qualifications: Bachelor's degree in computer science, information Systems, or related field Relevant work experience/certifications can be considered in lieu of degree Professional work experience in web application development Proficiency in Nest.js, Java 8, EJB, Docker, SQL Server/MySQL, and RESTful APIs Ability to read and parse JSON and XML and write unit/integration tests Experience with Angular, TypeScript, Azure DevOps, and Git Strongcommunication skills and ability to work independently Great to have, not required: Strong frontend development experience Exposure to or direct work experience in Agile environment Familiarity with secure coding practices and cybersecurity standards The base salary range provided below is for hires in those geographic areas only and will be commensurate with candidate experience. Pay ranges for candidates in other locations may differ based on the cost of labor in that location. In addition to base salary, all employees are eligible for a generous benefits package. Salary Range: $98.4k - $118.6k PLEASE NOTE: Applicants must be legally authorized to work in the United States. At this time, we are not able to sponsor or assume sponsorship of employment visas. If you have a disability under the Americans with Disabilities Act or similar state or local law and you wish to discuss potential reasonable accommodations related to applying for employment with us, please contact our Benefits Department at . Notice to Recruitment Agencies: Resumes submitted for this or any other position without prior authorization from Human Resources will be considered unsolicited. BWS and / or its affiliates will not be responsible for any fees associated with unsolicited submissions. We are an Equal Opportunity Employer. We do not discriminate on the basis of age, ancestry, color, gender, gender expression, gender identity, genetic information, marital status, national origin or citizenship (including language use restrictions), denial of family and medical care leave, disability (mental and physical) , including HIV and AIDS, medical condition (including cancer and genetic characteristics), race, religious creed (including religious dress and grooming practices), sex (including pregnancy, child birth, breastfeeding, and medical conditions related to pregnancy, child birth or breastfeeding), sexual orientation, military or veteran status, or other status protected by laws or regulations in the locations where we operate. We do not tolerate discrimination or harassment based on any of these characteristics. The collection of your personal information is subject to our HR Privacy Notice Benefits and Compensation We offer a competitive compensation package, performance-based incentives, and a comprehensive benefits program-including health, dental, vision, 401(k) with company match, paid time off, and professional development opportunities.

This is a U.S. based position. All of the programs we support require U.S. citizenship to be eligible for employment. All work must be conducted within the continental U.S. Who we are: Raft () is a customer-obsessed non-traditional small business with a purposeful focus on Distributed Data Systems, Platforms at Scale, and Complex Application Development, with headquarters in McLean, VA. Our range of clients includes innovative federal and public agencies leveraging design thinking, cutting-edge tech stack, and cloud-native ecosystem. We build digital solutions that impact the lives of millions of Americans. About the role: As a Software Engineer - Graph Technologies, you will be diving deeper into the software lifecycle, taking on more complex tasks and leading smaller project initiatives. You will not only write code but also be involved in design discussions, code reviews, and mentoring Associate and Standard Engineers, helping to maintain the high standards of our organization. This role is contingent on contract award. What we are looking for: 3+ years of hands-on experience as a software engineer Design and develop graph-based applications using Neo4j, Amazon Neptune, or similar graph databases Implement graph algorithms and analytics for complex data relationship analysis and visualization Build and maintain scalable microservices and APIs supporting Intelligence Community requirements Develop semantic data models and ontological frameworks, particularly Common Core Ontology implementations Collaborate with analysts and stakeholders to translate mission requirements into technical solutions Optimize graph queries and data structures for performance in high-security environments Participate in agile development practices including code reviews, testing, and continuous integration Support deployment and maintenance of applications in classified computing environments Bachelors degree in Computer Science, Engineering, Physics, Mathematics or a related field Graph Technology Experience - Hands-on experience with graph databases (Neo4j, Neptune, ArangoDB) and graph processing frameworks Highly preferred: Previous work supporting IC missions and familiarity with classified environments Direct experience with National Reconnaissance Office programs, data systems, or mission requirements Common Core Ontology (CCO) - Hands-on experience implementing CCO standards and semantic modeling frameworks Container Technologies - Experience with Kubernetes orchestration and Helm chart development/management Advanced Graph Skills - Experience with graph visualization tools, complex graph algorithms, or distributed graph processing Cloud Platforms - Familiarity with AWS/Azure services, particularly graph and analytics offerings Security+ or Similar - Current DoD 8570 baseline certification or equivalent Advanced Degree - Master's in Computer Science, Data Science, or related field Clearance Requirements: Active Top Secret clearance with ability to obtain and maintain SCI Preference for those with Polygraph Work Type: Onsite in Chantilly, VA Ability to work from a SCIF at least 3 days a week May require up to 25% travel Salary Range: $150,000 - $200,000 The determination of compensation is predicated upon a candidate's comprehensive experience, demonstrated skill, and proven abilities What we will offer you: Highly competitive salary Fully covered healthcare, dental, and vision coverage 401(k) and company match Take as you need PTO + 11 paid holidays Education & training benefits Generous Referral Bonuses And More! Our Vision Statement: We bridge the gap between humans and data through radical transparency and our obsession withthemission. Our Customer Obsession: We will approach every deliverable like it's a product. We will adopt a customer-obsessed mentality. As we grow, and our footprint becomes larger, teams and employees will treat each other not only as teammates but customers. We must live the customer-obsessed mindset, always. This will help us scale and it will translate to the interactions that our Rafters have with their clients and other product teams that they integrate with. Our culture will enable our success and set us apart from other companies. How do we get there? Public-sector modernization is critical for us to live in a better world. We, at Raft, want to innovate and solve complex problems. And, if we are successful, our generation and the ones that follow us will live in a delightful, efficient, and accessible world where out-of-box thinking,and collaboration is a norm. Raft's core philosophy is Ubuntu: IAm, BecauseWe are. We support our "nadi" by elevating the other Rafters. We work as a hyper collaborative team where each team member brings a unique perspective, adding value that did not exist before. People make Raft special. We celebrate each other and our cognitive and cultural diversity. We are devoted to our practice of innovation and collaboration. We're an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.

Software Engineer - TS/SCI Required Are you a software engineer who thrives on building robust, scalable systems? Do you enjoy crafting clean, maintainable code that powers mission-critical environments? At Expedition Technology (EXP), we're looking for a Software Engineer with a DevOps mindset to help us design and implement services that support verification, validation, testing, and evaluation workflows for the DoD and Intel communities. This role is ideal for someone who is a software engineer first-someone who writes production-grade Python, understands modern software architecture, and can contribute across the stack. DevOps experience is a bonus, especially if you've worked with containerized deployments and CI/CD pipelines, but your primary focus will be building the services that run in our mission environments. What You'll Do: Design and implement Python-based services and internal tools to support mission workflows Build scalable, maintainable, and testable software systems for verification and validation environments Collaborate across teams to establish best practices in software engineering, testing, and observability Contribute to the design and evolution of mission-critical environments Support deployment and automation efforts using containerization and CI/CD tools (bonus) Mentor teammates and help grow engineering capabilities across the team What You Bring: U.S. Citizenship An active TS/SCI security clearance Bachelor's degree in Computer Science, Electrical Engineering, or a related field 5+ years of experience in software engineering with a strong foundation in Python Ability to write clean, modular, and well-tested code using modern software engineering practices Solid understanding of software architecture, design patterns, and system integration Familiarity with containerization (e.g., Docker) and CI/CD tools (e.g., GitLab) is a plus Experience with Kubernetes is a bonus, but not required Familiarity with cloud platforms (e.g., AWS) is helpful, but not the primary focus A collaborative mindset and a passion for engineering excellence Why EXP? We're solving some of the nation's hardest problems with cutting-edge technology and a culture of innovation, collaboration, and autonomy. If you're ready to build systems that matter-and do it with a team that values engineering excellence-let's talk. Why Join Us? At Expedition Technology, you'll work on impactful projects that push the boundaries of what's possible with machine learning. You'll be part of a collaborative team that values innovation, technical excellence, and mission success. Join our expedition and help shape the future of intelligent systems. Clearance Required: TS/SCI Who is Expedition Technology? Expedition Technology (EXP) designs, develops, and delivers innovative, advanced signal, image, and multi-INT solutions for the defense and intelligence communities. We leverage advanced algorithms, platforms, and technologies to solve our customers' most complex, demanding, and urgent C4ISR challenges. Our culture promotes individual growth and opportunity, prioritizes a collaborative team spirit, and invites the intellectually curious to creatively solve challenging problems. Headquartered in Northern Virginia's high-tech corridor, EXP is a rapidly growing, privately held, employee-owned company that pushes the boundaries of what is possible every day. Interested in joining our team? Let's explore together. To learn more about EXP and discover why we are an award-winning workplace, visit ourweb siteand follow us on LinkedIn. Join Our Team and Enjoy Exceptional Benefits! Expedition Technology (EXP) offers a flexible, self-directed benefits package that is designed to fit your individual needs.Here's a glimpse of the outstanding benefits you can enjoy when you join our team: Company-paid medical, dental, and vision insurance Generous Time Off: Enjoy 12 paid holidays, up to 33 days of PTO, and generous sick leave Robust 401(k) Plan: Benefit from up to a 12% company contribution, including a 3% safe harbor, 6% match, and up to 3% additional as a form of profit sharing. Student Loan Repayment: Take advantage of our unique option to reallocate a portion of your 401(k) match funds to repay student loans, helping you achieve financial freedom faster. Paid Parental Leave: Six weeks of paid leave for the primary caregiver and 2 weeks of paid leave for the secondary caregiver for you to bond with your new family member. Tuition Reimbursement: Pursue further education with up to $5,250/year available to support your continuous learning and growth. Referral Bonus Program: Earn rewards for bringing talented individuals into our team. Exclusive Entertainment Perks: Enjoy free tickets to sporting events, theater, concerts, and more, adding fun and excitement to your life. Onsite Amenities: Stay fit and healthy with our free, onsite fitness center, active workstations featuring treadmill and bike desks, and enjoy our onsite cafeteria with reduced-cost options. Inspiring Work Culture: Thrive in a collaborative, creative, and supportive culture where you are encouraged to push boundaries, take risks, and enjoy the rewards. Join us and be part of a team that values your well-being and professional growth. Apply today and take the first step towards a fulfilling career with us! EXP is proud to be an Equal Opportunity Employer that believes a diverse range of talent creates an environment that fosters creativity and innovation . All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, genetic information, or protected veteran status.

The primary role of the Software Engineer is to design, develop, and maintain web-based software applications that support national defense missions. You'll contribute across the full development lifecycle and support backend services, REST APIs, and data pipelines that enable visualizations, analytics, and operational tools. **Position Responsibilities** + Build and maintain web applications and backend services using Java and Python + Develop RESTful APIs and integrate external data sources + Debug and correct software defects while optimizing performance + Contribute to DevOps workflows and CI/CD automation + Write and maintain technical documentation, tests, and release notes + Collaborate with developers, analysts, and mission stakeholders to define and refine features **Basic Qualifications** + Bachelor's degree in Computer Engineering, Computer Science, Electrical Engineering, Math, or Physics is required or equivalent combination of education, training, and experience + 5+ years of relevant experience + Proficiency in Java, Python, and frameworks like Spring Boot or Flask + Experience with Git, containerized environments (Docker/Kubernetes), and virtualized development environments + Strong understanding of distributed systems, microservices, and data pipelines + An active TS/SCI with Polygraph **Other Qualifications & Desired Competencies** + Familiarity with ElasticSearch, MongoDB, Redis, or ArangoDB + Experience integrating streaming data frameworks like Kafka or Flink + Exposure to batch analytics, machine learning pipelines, or AWS **Salary Range:** **$140,000 - $170,000** The pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Determination of official compensation or salary relies on several factors including, but not limited to, level of position, job responsibilities, geographic location, scope of relevant work experience, educational background, certifications, contract-specific affordability, organizational requirements, alignment with local internal equity as well as alignment with market data. **Clearance Level** Top Secret with Poly **ITAR Requirement:** _T_ _his position requires access to information that is subject to compliance with the International Traffic Arms Regulations ("ITAR") and/or the Export Administration Regulations ("EAR"). In order to comply with the requirements of the ITAR and/or the EAR, applicants must qualify as a U.S. person under the ITAR and the EAR, or a person to be approved for an export license by the governing agency whose technology comes under its jurisdiction. Please understand that any job offer that requires approval of an export license will be conditional on AeroVironment's determination that it will be able to obtain an export license in a time frame consistent with AeroVironment's business requirements. A "U.S. person" according to the ITAR definition is a U.S. citizen, U.S. lawful permanent resident (green card holder), or protected individual such as a refugee or asylee. See 22 CFR § 120.15. Some positions will require current U.S. Citizenship due to contract requirements._ **Benefits** : AV offers an excellent benefits package including medical, dental vision, 401K with company matching, a 9/80 work schedule and a paid holiday shutdown. For more information about our company benefit offerings please visit: ********************************* . We also encourage you to review our company website at ******************** to learn more about us. Principals only need apply. NO agencies please. **Who We Are** Based in California, AeroVironment (AVAV) is a global leader in unmanned aircraft systems (UAS) and tactical missile systems. Founded in 1971 by celebrated physicist and engineer, Dr. Paul MacCready, we've been at the leading edge of technical innovation for more than 45 years. Be a part of the team that developed the world's most widely used military drones and created the first submarine-launched reconnaissance drone, and has seven innovative vehicles that are part of the Smithsonian Institution's permanent collection in Washington, DC. Join us today in developing the next generation of small UAS and tactical missile systems that will deliver more actionable intelligence to our customers so they can proceed with certainty - and succeed. **What We Do** Building on a history of technological innovation, AeroVironment designs, develops, produces, and supports an advanced portfolio of unmanned aircraft systems (UAS) and tactical missile systems. Agencies of the U.S. Department of Defense and allied military services use the company's hand-launched UAS to provide situational awareness to tactical operating units through real-time, airborne reconnaissance, surveillance, and target acquisition. _We are proud to be an EEO/AA Equal Opportunity Employer, including disability/veterans. AeroVironment, Inc. is an Equal Employment Opportunity (EEO) employer and welcomes all qualified applicants. Qualified applicants will receive fair and impartial consideration without regard to race, sex, color, religion, national origin, age, disability, protected veteran status, genetic data, sexual orientation, gender identity or other legally protected status._ **ITAR** U.S. Citizenship required **About AV:** **AV isn't for everyone. We hire the curious, the relentless, the mission-obsessed. The best of the best.** We don't just build defense technology-we redefine what's possible. As the premier autonomous systems company in the U.S., AV delivers breakthrough capabilities across air, land, sea, space, and cyber. From AI-powered drones and loitering munitions to integrated autonomy and space resilience, our technologies shape the future of warfare and protect those who serve. Founded by legendary innovator Dr. Paul MacCready, AV has spent over 50 years pushing the boundaries of what unmanned systems can do. Our heritage includes seven platforms in the Smithsonian-but we're not building history, we're building what's next. **If you're ready to build technology that matters-with speed, scale, and purpose-there's no better place to do it than AV.** **Careers at AeroVironment (*****************************************

At the forefront of the staffing industry, Artech is a minority and women-owned business enterprise (MWBE) committed to maximizing global workforce solutions on behalf of its clients. Artech's deep heritage, proven expertise and insightful market intelligence has secured long-term partnerships with Fortune 500 and government clients seeking world-class professional resources. Job Description The TIBCO Developer will provide hands-on support using Tibco Business Works to assist with the design and construction of a data messaging prototype for a large Financial Services client. The role will eventually transition into full development lifecycle support for the production version of the data messaging application once the prototype is complete. Duties: Design and develop a data messaging prototype using TIBCO Business Works to support and streamline the client's data messaging process; Work closely with the client to define the business and system requirements for the data messaging prototype; Conduct development testing of the developed messaging prototype; Create detailed design documents for the data messaging prototype; Provide Tibco expertise and guidance to junior developers and clients supporting the development of the data messaging prototype Qualifications Required skills: 3 years of experience with Tibco Business Works; strong critical thinking skills; ability to quickly pick up new concepts and technologies; ability to effectively manage multiple tasks in a changing environment; good organization skills (e.g. documentation, note taking, etc.); ( good communications skills and successful experience explaining technical details to clients TIBCO-BusinessWorks Java Enterprise Ediition" Additional Information All your information will be kept confidential according to EEO guidelines. If you believe you're qualified for this position and are currently in the job market or interested in making a change, please give me a call as soon as possible at **************

Dev's Talent Network is designed to create a network of talented applicants who are interested in working for Dev Technology and are waiting for a job opening that matches their skills and experience. Here you will find positions we are "always recruiting" as well as an opportunity to share your resume with Dev, even if the job position you seek is not listed here today. The Dev Talent Network is a community of highly qualified technical and management professionals recognized by Dev to demonstrate strong alignment with our company culture. The Dev Talent Network is comprised of candidates, referrals, Dev alumni, and fellow colleagues with whom we have worked in the past. We're excited to evolve the Dev Talent Network so our members stay connected with Dev and discover new career opportunities with us. Responsibilities: Design, develop, test, and maintain a suite of Java applications Be an active member of an Agile development team, responsible for participating in all Agile ceremonies, updating Jira tasks daily and contributing to continual improvement strategies Troubleshoot complex issues in production and non-production systems Learn new technical skills to meet the needs of the project and our customers Required Education, Skills and Experience: Bachelor's degree plus 3 years of work experience or equivalent combination of education and experience. The work experience should be supporting Java applications and associated frameworks such as Spring. 2 years of development experience using JavaScript and/ or JavaScript frameworks like Angular 1 years of experience working in an Agile team development environment using Jira or a similar tool Experience writing automated unit tests Good communication skills, both written and verbal Ability to collaborate with team members to ensure client needs and expectations are met or exceeded Demonstrates a passion for solving complex software challenges, and enjoys working alongside fellow team members to make that happen Preferred Skills and Experience: Experience working in an automated development environment, using CI/CD tools such as Git, Bamboo, Jenkins, SonarQube Experience developing in and deploying to a Cloud environment (such as Amazon Web Services) Experience with AngularJS Experience with JMS (e.g., IBM MQ, ActiveMQ) Experience developing against relational databases (e.g., Oracle, PostgreSQL) Experience with Linux Clearance: Ability to obtain the required government clearance, DoD Secret, DHS public trust OR DoD Top Secret preferred. EEO/AA/Disability/Vets Employer. ***By submitting your information you agree our talent recruitment team may use your contact information to reach out to you regarding new opportunities that may be applicable to your experience.

360 IT Professionals is a Software Development Company based in Fremont, California that offers complete technology services in Mobile development, Web development, Cloud computing and IT staffing. Merging Information Technology skills in all its services and operations, the company caters to its globally positioned clients by providing dynamic feasible IT solutions. 360 IT Professionals work along with its clients to deliver high-performance results, based exclusively on the one of a kind requirement. Our services are vast and we produce software and web products. We specialize in Mobile development, i.e. iPhone and Android apps. We use Objective C and Swift programming languages to create native applications for iPhone, whereas we use Android Code to develop native applications for Android devices. To create applications that work on cross-platforms, we use a number of frameworks such as Titanium, PhoneGap and JQuery mobile. Furthermore, we build web products and offer services such as web designing, layouts, responsive designing, graphic designing, web application development using frameworks based on model view controller architecture and content management system. Our services also extend to the domain of Cloud Computing, where we provide Salesforce CRM to effectively manage one's business and ease out all the operations by giving an easy platform. Apart from this, we also provide IT Staffing services that can help your organization to a great extent as you can hire highly skilled personnel's through us. We make sure that we deliver performance driven products that are optimally developed as per your organization's needs. Take a shot at us for your IT requirements and experience a radical change. Job Description We are looking for Java Developer with NOSQL Database (e.g. Cassandra, Mogodb, Hbase exp ) in Ashburn VA. Qualifications Description Top 3 requirements highlighted (**) - BS degree in Computer Science, Engineering or a related subject - (**) Minimum 5 Years of hands-on Java EE development (**) - Excellent core Java skills including collections, algorithms, multithreading, OOP and design patterns - Knowledge of ETL tools like ODI , talend , Pentaho, Informatica, Pervasive, SSIS etc. - (**) Good Knowledge of Relational Databases, JDBC, ODBC, SQL technologies (**) - Experience with J2EE framework (JSP, Servlet, EJB, JMS, JSF, JMX) - (**) Experience with components in Hadoop ecosystem (Hive, Pig, Impala, Ambari, Oozie, Sqoop, Zookeeper, Mahout) (**) - Knowledge of NoSQL databases like MongoDB, Cassandra and Hbase - Good understanding of parsing, querying and transforming XML, HTML, and JSON files - Experience in creating and interfacing with SOAP/WSDL/XML/REST web services - Experience in building or supporting web applications with JavaScript, jQuery, JSON, HTML and AJAX - Experienced in developing web applications using at least one popular web framework (JSF, Wicket, GWT, Spring MVC) - Experienced with Scrum, test-driven development and Continuous Integration environments - Experienced with Linux operating system and shell scripting - Quick learner in adapting to new technologies and standards - Leverage a team of on-shore & off-shore developers Strong verbal and written communication skills Educational requirement: - BS degree in Computer Science, Engineering or a related subject Additional Information Thanks and Regards Hazel Thompson

Understand Business Requirements; participate in Requirements Analysis; identify solutions working with Architects; design Applications based on System Requirements and Architecture, prototype if necessary, develop, unit test and deploy application. Comply with the department /EA application standards and general industry based Java/JEE based application development principles, theories, concepts, documentation and techniques. Contribute and participate in producing high quality of design and code via reviews. Provide production support that includes evaluate defects, investigate cause and come up with solutions to address defects. Job Description Responsibilities include: • Java/JEE application design and development to migrate large monolithic application to micro services based architecture • Outside JEE application development, • Migrating existing delivery process to DevOps Automation, based on Containerization • The developer will setup Container based Development Ops function in our department, by bringing in experience of - evaluation of automation tools, design and implementation of automation and instill a Development Ops mindset into the development team. • JEE Developement and DevOPS Containers development/deployment experience. Qualifications *Qualifications • 8-10 years of experience in Design and Development of Applications and Web Services using the Java EE, JSP, XML, Weblogic 10, AJAX. Ability to independently perform the all developer duties from Analysis to deployment to post production defect fixing. • 1-2 years of DevOPS experience in developing and deploying containers using Docker, OpenShift etc. • Primarily expert at writing services/APIs and back end business logic applications. • Development and deployment of micro-services is DESIRED. • Expert in Object Oriented Analysis and Design using Java and UML. Produce high quality design artifacts that cover all aspects of sound architecture. Ability to review and comment on Jr Developers design. • Experience in setup of automated Continuous Integration and Continuous Delivery of JEE applications using the listed or comparable tools - git, bitbucket/teamforge, Linux/Unix, maven/gradle/grunt/gulp, jenkins, npm/artifactory, splunk/logstash, selenium/junit, ansible/chef/puppet • Hands-on experience in scripting leveraging APIs to automate delivery processes, on Weblogic/Tomcat, DB2, Unix/Linux platforms. • Strong experience in using JEE patterns in real time situations. • Not a just developer, but a developer with mindset to think holistically to build a reliable, flexible, well performing system with completely automated delivery processes. • Experience in using Java presentation frameworks - STRUTS or similar frameworks, and JQuery • Integration experience using Web Services and EJB preferably on Oracle/Weblogic Suite, Oracle BAM (Business Activity Monitoring) and Oracle BPM (Business Process Management). • Fully understand how to configure web and applications on Weblogic Server. • Strong backend experience to develop Data Layer using frameworks like Hibernate, JPA etc. Experience in creating backed frameworks is huge plus. • Experience in Data Integration, Messaging/Events and SOA using Oracle SOA Suite • Strong experience in using XML, JAXB, and XML persistence using XQuery. • Extensive use of Eclipse (commonly used plug-ins and debug techniques) • Experience with Build and Deployment tools and languages - ANT, Shell script, Maven, and Jenkins. • Expert in creating SQL, XQuery and Stored Procedures, performance tuning of Database queries. Additional Information Interested candidates please contact Abhishek Agarwal **********************************************

Hello, Greetings from Jobsbridge! Jobsbridge, Inc. is a fast growing Silicon Valley based I.T staffing and professional services company specializing in Web, Cloud & Mobility staffing solutions. Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Job Description Good Communication skills, Onsite experience Java and J2EE, JDBC, JSP Spring Framework (preferable 3.0 up), Spring Web and Spring REST Apache Commons (lang, logging, math) REST and REST Web Services (JSON) Javascript: JQuery (AngularJS and/or NodeJS is a plus) HTML and CSS (Bootstrap CSS framework) Dev environment: Apache Maven, Netbeans or Eclipse, Tomcat SQL (MySQL preferred) Qualifications Skill: J2EE, JDBC, JSP, JQuery, CSS Additional Information All your information will be kept confidential according to EEO guidelines.

Job DescriptionDescription: We are seeking a skilled Full Stack Developer to join our dynamic team. The ideal candidate will have a strong foundation in both front-end and back-end development, with the ability to build and maintain scalable web applications. You will work collaboratively with cross-functional teams to deliver high-quality software solutions that meet our clients' needs. Responsibilities Design, develop, and maintain robust web applications using modern frameworks and technologies. Collaborate with product managers, designers, and other developers to define project requirements and specifications. Implement RESTful APIs and integrate third-party services to enhance application functionality. Write clean, maintainable code while adhering to best practices in software development. Conduct code reviews and provide constructive feedback to team members. Troubleshoot and debug applications to ensure optimal performance and user experience. Stay updated with emerging technologies and industry trends to continuously improve skills and knowledge. Requirements: Proficiency in front-end technologies such as React and Express, along with back-end frameworks like Ruby on Rails or .NET. Strong understanding of database management systems, particularly SQL. Experience with programming languages including Python and VBA is a plus. Familiarity with role-based access control (RBAC) principles is desirable. Previous experience in software development projects showcasing your ability to deliver quality results within deadlines. Experience with kafka, Active MQ, angular. Excellent problem-solving skills and attention to detail, coupled with the ability to work effectively in a team-oriented environment. If you are passionate about technology and eager to contribute your expertise as a Full Stack Developer, we encourage you to apply for this exciting opportunity!

Candidate willing to work on our W2 payroll will be considered most (H1B Visa transfer is possible). Candidates eligible to work at USA with valid visa should apply. Third Party Vendors Please do not submit your candidates. Job DescriptionTitile: Java Developer with Chordiant application Exp-#E040900 Location: Richmond, VA Duration: 12 Months Java Developer with three or more years as a senior developer in a complex Chordiant application, preferably in a Heath Care company. Reverse engineer a call center software application that uses Chordiant and rewrite in Java. Technical analysis, design, and programming for complex business applications. Participation and leadership of all aspects of the SDLC for application development and application support. Works with clients and BSAs to understand requirements and develop application changes that meet business need in a creative and productive manner. Provides technical expertise and business knowledge as well as architectural and infrastructure direction. Provides clear instructions to DBAs, Infrastructure service ops, EIS, networks, IVR, and other technical IT upon which the application depends. Provides subject matter expertise and leadership to contractors and partners assisting in application support. Works with architecture to define applications solutions. Documents all work. Understanding and experience with industry standard analysis, documentation, and development tools such as SQL, RAD, jbuilder, jprobe, junit, RUM, and object modeling. Understanding and experience in Health Care Call Center applications. Ability to perform complex analysis, design, development and unit testing. Familiar with industry standard QA processes for IT development. Ability to guide support staff in the areas of UNIX, WAS, MQ. Excellent verbal and written communication skills. Ability to negotiate effectively. Ability to perform presentations and facilitate meetings to effective results. Ability to work in teams and in a virtual environment. Additional Information Please respond with updated resume and covering letter with few sentences how you meet each Requested Qualification referring your earlier projects 3 references are must with the resume. Please note that our client does allow Skype/remote interviews. However they reserve the right to require an in-person interview.In-person interview will keep the candidate above all. Contact [email protected] or Ph # 203-567-0129 for further information.

EROS Technologies was founded with a simple motive of offering the clients exactly what they want, how they want and when they want it. By leveraging for its clients its technological edge and right-sourcing advantage, EROS in a short period of time has grown to become one of the most trusted strategic technology partners. Treating every client as the top priority, we customize our solutions and services to align with the unique needs of each client. Job Description Relevant Experience (in Yrs) 5+ Experience Technical/Functional Skills J2EE Technologies Experience Required • BS/MS in engineering, business or a related field, MBA a plus • 7+ years' experience in Web Development • Advanced knowledge of Microsoft Excel and SQL Query languages required Roles & Responsibilities • 5+ Years' experience in Web application development using J2EE technologies. • Strong experience on REST Web Services. • Awareness of Content Management frameworks like Apache Sling, Apache Felix (OSGI), Apache Jackrabbit, Java Content Repository (JSR-170 API) • Expertise with front end technologies such as JQuery, Bootstrap, CSS. • Familiarity with Content Management tools, Adobe CQ/AEM preferred • Understanding of URL rewriting rules. • Build Tools - Maven / ANT, Jenkins, CI Tools • Version Management : GIT/ SVN • Lifecycle management Tools : Version One • Experience with Agile/Iterative/TDD Project Methodology, SCRUM • Excellent communications skills - verbal and written & problem solving skills • Experience of working in insurance domain. • Integration experience with Salesforce is a plus. • Conduct designing sessions with development teams at low level projects. • Developed IT frameworks and productivity accelerators along with team of architects. Generic Managerial Skills • Ability to prioritize and work on multiple tasks simultaneously • Strong communication and organizational skills • Ability to multi-task, prioritize and execute on assigned deliverables • Ability to quickly learn new systems and business processes Additional Information All your information will be kept confidential according t o EEO guidelines.

Full Stack Software Developer Job Type: Full time, 10% travel Salary Target: $150,000 - $225,000 Minimum Clearance: US Citizen holding an active Top Secret/SCI clearance Xenith Solutions is a small mission-focused business serving Federal / Civilian, Defense and Intelligence organizations with superior service. If you want to be a part of a rapidly growing business with an exceptional culture, then you want to be a part of the Xenith Solutions family. Xenith Solutions is seeking a Full Stack Software Engineer to join our team in support of a government contract for the Defense Advanced Research Projects Agency (DARPA) focused on the Joint Fires Network (JFN). Job Description: We are seeking a highly skilled Full Stack Software Developer to join our team and provide essential development and support to a strategic initiative. Responsibilities, but not limited to: • Provide Software Engineering Expertise and Support for DE2 toolboxes • Responsible for upkeep and maintenance of all DE2 toolboxes at DEN • Document existing systems architecture and technology; make recommendations for improvements and/or alternatives to current solutions • Maintain working knowledge of the interconnectivity and integration of DE2 toolboxes and supporting software applications • Leverage overall system architecture and interface knowledge to provide support during DE2 testing and execution events • Create design plan for already identified architecture enhancements • Demonstrate solutions by developing documentation, flowcharts, layouts, diagrams, charts, code comments, and clear code • Serve as a technical liaison to the DE2 product lead • Contribute technical content and tutorials to product documentation • Position requires ~80% onsite support at DARPA Arlington, VA Required Qualifications: • B.A. or B.S. in Computer Science, Engineering, Information Technology, or related discipline • US Citizenship and an active Top Secret/SCI clearance • 5+ years of experience as a software engineer • Proficiency in SysML • Ability to represent successful completion of work in Agile Management systems (e.g. Jira, Confluence, GitLab) • Experience with QT4 and QT5 • Experience with REST APIs and CRUD APIs • Experience with Docker container-related technologies (i.e. Kubernetes) • Proficiency in C++, Java, and Python • Experience with Cameo System Modeler • Experience with debugging WireShark • Experience with DIS network protocol • Comfortable developing on both Windows and Linux • Experience with TCP and UDP