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Senior software engineer jobs in Thornton, CO

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  • Software Engineer in Test

    Adalta

    Senior software engineer job in Denver, CO

    Test Automation Engineer Denver, CO | Hybrid | $90,000 - $115,000 Work Arrangement: 3 days on-site, 2 days from home You will work across development and operations functions, contribute to test automation using AI, and support the delivery of high-quality software solutions in a fast-growing environment. What You'll Do Design, develop, and maintain end-to-end and integration automated test suites for complex systems, focusing on microservices and publish-subscribe architectures. Collaborate with development and operations teams to enhance and maintain robust testing infrastructure. Prioritize manual test cases for automation to ensure a streamlined and efficient testing process. Translate project requirements into comprehensive test plans and automated test cases. Report on test suite performance and integrate testing into CI/CD pipelines for clear communication of status and metrics. Apply best practices in the testing pyramid to ensure thorough coverage across unit, integration, and end-to-end testing. Coordinate testing efforts across multiple teams and stakeholders to align resources and priorities. Participate in code reviews and provide constructive feedback to improve code quality and testability. What We're Looking For Proven experience designing and implementing automated test suites for complex systems, particularly microservices and publish-subscribe architectures. Experience leveraging AI to enhance testing processes. Strong problem-solving skills and exceptional attention to detail. Proficiency in programming languages such as C#, JavaScript, TypeScript, Python, or Golang. Effective communication skills with the ability to collaborate across technical teams. Experience developing and maintaining CI/CD pipelines to support efficient software delivery. Familiarity with infrastructure and environment management tools like Docker and Kubernetes. Experience mentoring and guiding junior engineers in testing practices and strategies. Knowledge of cloud platforms including Google Cloud, AWS, or Azure.
    $90k-115k yearly 1d ago
  • Sr. Software Engineer - Java

    Ledgent Technology 3.5company rating

    Senior software engineer job in Louisville, CO

    Schedule: Hybrid Work - 1 day per week onsite on Tuesday's Type: Full-Time, Direct Hire Salary: $120k - $150k (based on experience) Please note: Applicants must be authorized to work in the United States without the need for current or future visa sponsorship. We are unable to partner with third-party vendors or engage in Corp-to-Corp (C2C) arrangements. We are seeking a Sr. Software Engineer with deep technical expertise and a proven track record in designing, developing, and delivering high-quality, scalable software solutions. The Sr. Software Engineer reports to the Director, SWE and will be responsible for the creation, implementation, and support of existing and next-generation software solutions. The ideal candidate will be proficient in Java and the J2EE stack, experienced in AWS cloud services, and skilled in CI/CD pipelines and software design patterns. Duties and responsibilities Design and implement scalable, secure, and maintainable software systems that align with business needs, creating flexible, reusable, and efficient solutions. Lead technical design for complex stories, features, and epics, authoring technical documentation and ensuring adherence to IT control policies. Collaborate proactively with cross-functional teams to address technical dependencies, review ideas and concerns, and deliver high-quality products. Identify root causes of challenges, analyze upstream and downstream impacts, and recommend impactful, broad-reaching solutions while considering corporate strategy and trade-offs. Establish and guide best practices for design, development, testing, and Agile workflows, mentoring team members and fostering a collaborative environment. Build and maintain strong business relationships to influence decision-making and drive innovative solutions across teams. Collaborate with Senior partners to ensure consistent design and coding standards are maintained across all development teams, including those led by offshore managers. Maintain a deep understanding of software subsystems, their components, interfaces, and data integrations to ensure seamless functionality and scalability. Required Qualifications 5+ years of experience designing and implementing technological solutions using Java, J2EE technologies BS Degree in Computer Science Proficiency in AWS technologies including EC2, SNS, SQS, S3, SES, ESS, Lambda etc. Expert in Databases such as MongoDB, ElasticSearch and MYSQL. Experience with Rules Engine and/or Event driven architecture. Exposure to improvement in Design best practices including performance, scalability, robustness and resiliency. Prior experience working in an AGILE/SCRUM environment. Must be able to work independently and as part of a team on multiple overlapping projects. Proven track record of successfully delivering large, complex, cross-functional projects. Strong problem-solving and communication skills. Knowledge, Skills, and Abilities Proven track record of managing multiple projects and delivering high-quality results with innovation and creativity. Communicates complex technical concepts effectively to diverse audiences, including technical and non-technical teams. Collaborates seamlessly across departments with varying levels of technical expertise. Demonstrates a strong understanding of system-wide impacts and interdependencies across products, teams, and the organization. Develops and implements innovative solutions that challenge the status quo and drive process improvement. Addresses internal and external customer needs effectively, with the ability to interact directly with customers. Adapts to changing conditions with flexibility and leads others through transitions with clarity and confidence. Leads by example, fostering teamwork, trust, and a shared purpose while promoting success and strategic thinking. Applies Agile/LEAN principles and methodologies to improve efficiency and deliver value. Benefits include health, vision, and dental insurance, accident and life insurance, 401k matching, paid time off, and education reimbursement, to name a few. All qualified applicants will receive consideration for employment without regard to race, color, national origin, age, ancestry, religion, sex, sexual orientation, gender identity, gender expression, marital status, disability, medical condition, genetic information, pregnancy, or military or veteran status. We consider all qualified applicants, including those with criminal histories, in a manner consistent with state and local laws, including the California Fair Chance Act, City of Los Angeles' Fair Chance Initiative for Hiring Ordinance, and Los Angeles County Fair Chance Ordinance. For unincorporated Los Angeles county, to the extent our customers require a background check for certain positions, the Company faces a significant risk to its business operations and business reputation unless a review of criminal history is conducted for those specific job positions.
    $120k-150k yearly 1d ago
  • Software Engineer

    Talent Stack

    Senior software engineer job in Aurora, CO

    Job Title: Software Engineer Clearance: Active & transferable TS/SCI with Polygraph Salary: $130,000 - $145,000 Benefits: This role includes Medical, Dental, and Vision coverage, 6 weeks of paid PTO, Short-Term Disability, a 401(k) with 5% company match, and up to $8,000 in relocation assistance. Full Benefits package can be sent upon request. About the Company This role is being managed by Talent Stack LLC, a woman-owned recruiting firm specializing in cleared and technical placements. We proudly represent a confidential defense-focused client supporting critical national security programs. About the Role We are seeking a Software Engineer to support mission-critical ground systems for a leading defense customer. In this role, you will evaluate operational software issues, provide rapid solutions, and support integration and verification activities for new software baselines. This position is hands-on and ideal for engineers who thrive in real-time, high-impact operational environments. What You Will Do Support troubleshooting, maintenance, and documentation of operational software applications. Troubleshoot and isolate sources of system errors or unexpected performance. Execute testing, integration, and delivery of new software baselines. Perform in-depth analysis across complex, end-to-end operational systems. Work onsite within a secure environment supporting mission operations. Required Qualifications Bachelor's degree in STEM. 2+ years of professional level experience at a government contractor or agency. Experience coding in Java or C++. Hands-on experience with software development and/or software integration. Active, transferable TS/SCI with Polygraph required prior to start. Preferred Qualifications Experience with Git, Bitbucket, or similar configuration management tools. Ability to work in a structured configuration-controlled O&M environment supporting real-time applications. Experience with Linux/Unix, GIT, and SQL. Familiarity with JIRA, BitBucket, and Confluence. This role requires an active and transferable DoD Top Secret security clearance, with the ability to obtain and maintain TS/SCI access and polygraph. Only U.S. citizens are eligible for security clearance. Candidates without the required clearance cannot be considered for this position. Recruitment Agencies Disclaimer This position is posted for direct applicants only. We kindly request that external recruiters, staffing agencies, or search firms refrain from submitting candidates. Unsolicited resumes will be treated as direct applications, and no agency fees will be honored. Reference Number: X15
    $130k-145k yearly 5d ago
  • Lead Software Engineer

    The Ash Group

    Senior software engineer job in Greenwood Village, CO

    *** W2 Contract Only - No C2C - No 3rd Parties *** The Ash Group is hiring a Lead Software Engineer (Full Stack) for our client (one of the largest private credit providers in the US agricultural economy) based in Greenwood Village, CO (hybrid). This is a high-impact role requiring 6-8 years of experience, with mandatory hands-on expertise in React (4+ years) and Node.js (4+ years). You will be leading the design and development of foundational SPA (Single Page Application) and BFF (Backend for Frontend) architecture on AWS, driving major digital transformation and automating business processes. Role Details Compensation: Competitive pay rate of $95 per hour. Benefits: Medical, dental, vision, and direct primary care benefits. After six months of employment, enjoy a 4% matched 401(k) plan with immediate 100% vesting. Duration: 6-month contract with possible extension. Location: Hybrid in Greenwood Village, CO (availability during 9 am - 5 pm MT core hours required). What You'll Be Doing Lead the design, development, and implementation of technical solutions as a Full Stack Engineer, with a focus on building robust, cloud-based solutions on AWS. Mandatory hands-on development using React, HTML/CSS, and Node.js, including the creation of Restful APIs for Single Page Applications. Support the RPA (Robotics Process Automation) team and develop solutions for improving quality, delivery, and customer/employee experience using automation technologies. Apply a strong understanding of the Software Development Lifecycle (SDLC) and CI/CD pipelines (e.g., Git, Docker, Kubernetes) to ensure reliable deployments and automation. Provide workday and after-hours production support, including troubleshooting, problem correction, and root cause analysis. What We're Looking For 6-8 years of experience as a Software Engineer. 4+ years of hands-on experience with Front-end technologies: React, HTML/CSS. 4+ years of hands-on experience with Back-end technologies: Node.js. Experience building Restful APIs and developing Single Page Applications (SPAs). Experience with AWS (or GCP, Azure) and container orchestration services like Docker and Kubernetes. Strong understanding of CI/CD pipelines, Git, and version control processes. Proficiency with SQL, Python, and open-source databases is a plus. This is a rare opportunity to work on an architecture being built from the ground up, driving the launch of new, transformative digital processes for a major financial institution. #SoftwareEngineer #LeadEngineer #FullStackDeveloper #React #NodeJS #AWS #SPA #BFF #RPA #Kubernetes #GreenwoodVillageJobs #ColoradoJobs #HybridWork #Contract
    $95 hourly 2d ago
  • Software Engineer in Test

    Evona

    Senior software engineer job in Denver, CO

    Software Development Engineer in Test (SDET) Active US Security Clearance required Are you the kind of engineer who loves breaking things so the system becomes stronger? If you enjoy pushing distributed systems to their limits and building automation that mirrors real world behaviors, this role will be right up your street. A fast growing space technology company is searching for an SDET to help test, validate, and stress their mission critical software. You will work on technology that powers satellite operations, command and control services, and large scale real time behaviours. You do not need to be a space expert. If you love Python, automation, and solving complex problems, you will thrive here. What you will be doing • Building and automating tests that mirror real customer use cases • Simulating hundreds to thousands of satellites running operations • Acting as a chaos tester to uncover weaknesses and improve system resilience • Troubleshooting and fixing bugs across deployed backend systems • Testing APIs, databases, event driven architectures, and containerized environments • Supporting CI and automation within modern DevOps pipelines • Working closely with frontend, backend, and product teams to ensure quality at scale What you will need • Proficiency in Python • Experience with Playwright, Cypress, or similar end to end testing frameworks • Strong understanding of containerized and serverless architectures • Skilled in API testing and distributed databases • Experience building CI or automation pipelines, ideally with GitHub Actions • A track record of solving technical problems with minimal oversight • Active US Security Clearance (Secret required, TS or TS SCI preferred) • Must meet ITAR requirements (US citizen, US national, green card holder) What you will get • Hybrid work, two days per week on site with flexibility • Comprehensive health insurance with full coverage for employees • Unlimited PTO with a requirement to take at least 15 days • Most US federal holidays observed • Quarterly wellness benefits • 4 percent 401(k) matching • Quarterly offsites in great destinations • A team that values ownership, curiosity, and continuous improvement If you are excited by the idea of testing systems at scale and helping shape the future of satellite operations, I would love to speak with you. Feel free to reach out to Ciara Holmes at EVONA for more information or to apply directly.
    $64k-85k yearly est. 4d ago
  • Staff Software Engineer

    Woods & Co 3.9company rating

    Senior software engineer job in Denver, CO

    Woods & Co is partnered with a rapidly scaling VC backed fintech platform building AI-powered software that personalizes financial decision-making across consumers, advisors, and institutions. The ideal candidate will take ownership of backend architecture, data pipelines, and infrastructure across multiple AI-driven product lines. This role sits at the intersection of systems design, execution, and technical leadership, with direct exposure to roadmap decisions and platform strategy. They will work end-to-end from architectural design through to writing and launching code, all in a fast-paced environment. What You'll Be Doing Design and implement scalable backend systems, infrastructure, and data pipelines supporting AI-enabled products Write, review, and ship high-quality production code across Python, TypeScript, and related technologies Make key architectural decisions across cloud infrastructure, system design, and data flow Partner closely with product, data/AI, and DevOps teams to deliver secure, reliable, and performant systems Act as a go-to technical resource for complex backend, infrastructure, and data challenges Contribute technical insight into build vs. buy decisions and longer-term platform investments Continuously improve system reliability, developer experience, and scalability as the business grows About You 7+ years of software engineering experience, with deep expertise in backend systems and infrastructure Strong background working in fast-paced startup or scale-up environments Proven track record of building and shipping data-heavy or AI-driven products end-to-end Strong hands-on coding ability in Python and TypeScript Experience designing and scaling data pipelines and integrating with AI/ML systems Solid understanding of relational and non-relational databases (Postgres, SQL, MongoDB, etc.) Comfortable balancing hands-on execution with architectural vision and technical leadership Commercially minded, pragmatic, and comfortable operating with ambiguity What's in It For You Highly competitive base salary (commensurate with seniority and experience) Meaningful equity participation, aligned with long-term value creation Comprehensive health, dental, and vision coverage Retirement benefits and flexible PTO Direct access to senior leadership and influence over core platform decisions Opportunity to help shape and scale a category-defining fintech platform If you're as passionate about this position as we are, then please don't delay and APPLY NOW! We are interviewing immediately! To find out more about this position, please call Luca on ***************** or email luca@woodsco.global Woods & Co Recruitment is committed to creating a positively diverse and inclusive workforce that values all backgrounds and experiences. We do not discriminate and encourage applications (no matter age or status), people from culturally and/or linguistically diverse backgrounds, all members and genders of the LGBTQI community, and people with disability.
    $106k-141k yearly est. 1d ago
  • Application Developer

    It Resource Hunter

    Senior software engineer job in Broomfield, CO

    The Application Development Manager is responsible for designing, building, implementing, and supporting both vendor-packaged and custom internal solutions enterprise applications, in line with the strategic plan and technology roadmap. This role leads the design, development, and delivery of business solutions aimed at optimizing operational efficiency through technology. Qualifications: 1. Six (6) years' experience with financial institution technologies: Jack Henry (Symitar, Synapsys, Synergy, SymXchange, ARCU), MeridianLink, Encompass, Alkami, COTS, Image Center, OpCon, etc. 2. Experience in software development methodologies, version control, and testing practices. 3. Experience in leadership and people management experience with an emphasis on coaching, mentoring, guiding and motivating team members on project and product delivery and career /professional development. 4. Ability to influence executive leadership. 5. Understands the principles of project management practices in an agile and iterative project management methodology. Required: 1 BS or MS in Computer Science, Information Systems, Engineering or equivalent. 2 Hands-on experience developing, integrating and supporting core banking application (Symitar/PowerOn / RepGen). 3 Knowledge and experience with IBM's AIX operating system 4 Knowledge in SQL development for relational databases, HTML, and Java Script. 5 Knowledge of the ITIL framework and experience implementing engineering processes, procedures, and templates.
    $63k-87k yearly est. 1d ago
  • Senior Software Engineer

    Crosscheck Staffing

    Senior software engineer job in Denver, CO

    Crosscheck Staffing is currently working with a well-funded startup approaching Series A funding. This is a hands-on role focused primarily on backend systems, APIs, and integrations, with occasional frontend work. You'll be joining a small, highly collaborative team at an inflection point as the company gains momentum and prepares for its next phase of growth. What We're Looking For Strong backend engineer with experience building and owning production APIs Hands-on experience integrating third-party APIs and external systems Comfortable owning features end-to-end in a small, early-stage team Familiarity with modern backend languages and frameworks (Node/TypeScript, Python, Go, etc.) Willingness to contribute to frontend work when needed (not a frontend-heavy role) Enjoys in-person collaboration and early-stage startup environments Our Stack (Nice to Have, Not Required) TypeScript, React NestJS, Postgres, Prisma AWS, Docker, Vercel
    $81k-106k yearly est. 2d ago
  • Advanced DevOps Engineer

    General Dynamics Mission Systems 4.9company rating

    Senior software engineer job in Boulder, CO

    As an Advanced DevOps Engineer, you will: Contribute to automation that instantiates and maintains container orchestration platforms Automatically configure and deploy infrastructure services consisting of identity and access management, network architecture, application security, logging, monitoring, deployment and more Work closely with our team to plan major updates and enhancements to our products In this role, you will be working with critical internal and external platform consumers. Together with the team, you will support successful implementation of the platform in the Cloud through architecture guidance, best practices, data migration, implementation, troubleshooting, monitoring, and more. Workplace Options: This position is flex but requires at least 2-3 days per week of onsite support in Boulder, CO. Candidates should have demonstrated familiarity and experience in some of the following areas: Experience working with, or are familiar with the differences between, public (AWS, Azure), private (RHOSP, VIO), and mixed cloud environments Container technologies such as Docker, or Kubernetes Deployment or use of continuous integration and continuous deployment technologies such as GitLab, Jenkins, Puppet, or Chef Experience supporting production-grade applications in virtualized environments (cloud computing platforms and services) using automation Creation or use of pipelines, Ansible Playbooks, and/or Terraform configurations to automate administrative actions from resource creation to service configuration Effective communication and attention to detail Other beneficial experience: IT security practices including encryption, certificates, key management, patch management, STIG, RMF, or security hardening, and auditing Installation of Infrastructure as a Service (IaaS) technologies such as Amazon Web Services, OpenStack, RHOSP, or VIO Management of Cloud Resources in Amazon Web Services, and/or Azure Platform as a Service (PaaS) technologies such as Kubernetes, Rancher, or OpenShift Cloud automation tooling such as Ansible, Terraform, Terragrunt, or Packer Open source server, messaging, load balancing, and database software (such as RabbitMQ, Redis, Elasticsearch) Scalable networking technologies such as Load Balancers (NGINX)/Firewalls and web standards (REST APIs, web security mechanisms) EDUCATION REQUIREMENTS: Requires a Bachelor's degree in Software Engineering, or a related Science, Engineering, Technology or Mathematics field. Also requires 5+ years of job-related experience, or a Master's degree plus 3 years of job-related experience. Agile experience preferred. CLEARANCE REQUIREMENTS: Must hold Department of Defense TS/SCI security clearance to be eligible for consideration. Due to the nature of work performed within our facilities, U.S. citizenship is required.
    $74k-101k yearly est. 2d ago
  • Senior Software Engineer

    Talent Navigation Experts

    Senior software engineer job in Greenwood Village, CO

    About the Role: This role is a Senior .NET Full Stack Developer for a client of ours in the tech solutions space. Looking for someone with 5+ full stack development. Required Skills: Bachelor's Degree in IT, Computer Science, or similar 5+ years of full stack development using .NET (C#) frameworks NoSQL experience AWS and / or Azure experience About the Company: Our client in the tech solutions space is a small but growing company based in Colorado. They have a superior software product and are continuing to grow at a rapid pace. They work hard and have an excellent culture.
    $81k-106k yearly est. 4d ago
  • Staff Software Engineer - Filesystems and Data Protocols (C++)

    Maxonic Inc.

    Senior software engineer job in Denver, CO

    Job Title: Staff Software Engineer - Filesystems and Data Protocols Job Type: 6 mths CTH or Direct FTE, both okay. Responsibilities: We are looking for a highly skilled Staff Software Engineer with specialization in Filesystems and Data Protocols to join the team. In this pivotal role, you will design, develop, and optimize the core components of Infinia, Client's advanced distributed intelligent data platform. You will leverage cutting-edge AI development and deployment tooling-prompt engineering, to reduce time-to-insight, accelerate delivery velocity for better Business outcomes. Key Responsibilities: Design and implement Data Orchestration layer on top of distributed Filesystem. This module will integrate Infinia on premise solution with multi cloud Data Services. Design and enhance the core components of Infinia for high performance and scalability. Own critical customer case escalations end-to-end, including deep root cause analysis and mitigation strategies. Drive design discussions, build prototypes and contribute to deliver high quality products Utilize AI-powered debugging, log analysis, and system pattern recognition tools to accelerate resolution. Conduct code reviews and improve scalability, stability, reliability and performance of INFINIA solutions Required Qualifications: Bachelor's or master's degree in computer science, Software Engineering, or a related field. 8+ years of Data Storage and management, software engineering experience. Strong expertise in C++ Preferred Skills: Experience with cloud Data Storage services like AWS S3 or Google Cloud Storage (GCS). Data movement, copy workflows: remote replication, cloud backup/restore Experience with real-time data processing and streaming frameworks such as Apache Kafka. Experience with Distributed systems About Maxonic: Since 2002 Maxonic has been at the forefront of connecting candidate strengths to client challenges. Our award winning, dedicated team of recruiting professionals are specialized by technology, are great listeners, and will seek to find a position that meets the long-term career needs of our candidates. We take pride in the over 10,000 candidates that we have placed, and the repeat business that we earn from our satisfied clients. Interested in Applying? Please apply with your most current resume. Feel free to contact Nina Schindler (**************** / ************** for more details.
    $89k-122k yearly est. 4d ago
  • Technical Lead

    Trident Consulting 3.6company rating

    Senior software engineer job in Denver, CO

    Trident Consulting is seeking a ”Angular Lead”. A global leader in business and technology services. Role: Angular Lead Duration: 6+ Months with the possibility of extension (Contract) Pay Rate: $60 - $65/hr. Job Summary: We are looking for a tech lead with 10+ years of experience to join one of the leading Comms Media account. As a leader on the team, this role will work to help the team prioritize, build, and ship the most impactful features to our customers. The ideal candidate is a technical professional who has deep understanding and hands-on experience in responsive web and app UX design and knowledge of micro-frontends and module-federation. Candidate is expected to serve as a mentor to help guide and train other engineers on the team. Should possess good communication skills and prior experience on collaborating directly with client stakeholders and offshore teams. Required Skills: Angular, Typescript, HTML, CSS, JS, Ionic, NGRX, GraphQL build runners, pre-processors (e.g. Babel, SASS/LESS, etc. Agile methodologies and web development; should possess good communication and stakeholder management skills. Nice to have: Docker, Kubernetes, CI/CD tools and technologies Experience: 10 - 15 years Roles & Responsibilities: Contribute to the technical direction, execution and final decisions for all software solutions created (including information architecture, software architecture, software design, testing, automation, analytics and instrumentation). Design, implement, monitor, enhance and troubleshoot systems in assigned areas - Develop an organization that supports outcome-based delivery, resolving technical debt, responding to production issues, improving quality, and investing in predictability. Monitors production data and user testing to make data-driven decisions. Take ownership and make technical decisions on software development projects. Estimate scope of work, develop and implement software according to proposals. Keep current with trends and technological innovations in the industry in order to contribute to the execution proof-of-concept for new approaches. About Trident Trident Consulting is a premier IT staffing firm providing high-impact workforce solutions to Fortune 500 and mid-market clients. Since 2005, we've specialized in sourcing elite technology and engineering talent for contract, direct hire, and managed services roles. Our expertise spans cloud, AI/ML, cybersecurity, and data analytics, supported by a 3M+ candidate database and a 78% fill ratio. With a highly engaged leadership team and a reputation for delivering hard-to-fill, niche talent, we help organizations build agile, high-performing teams that drive innovation and business success. Some of our recent awards include Trailblazer Women Award 2025 by Consulate General of India in San Francisco Ranked as the #1 Women Owned Business Enterprise in the large category by ITServe. Received the TechServe Excellence award. Consistently ranked in the Inc. 5000 list of fastest-growing private companies in America Recognized in the SF Business Times as one of the Largest Bay Area BIPOC/Minority-Owned Businesses in 2022.
    $60-65 hourly 1d ago
  • Sr UI Software Engineer

    SBS Creatix 3.6company rating

    Senior software engineer job in Boulder, CO

    Job Title: Senior UI Software Engineer (On Site) No C2C Offers please. Candidates must be able to work in the US without a sponsor. Our client is engineering a next-generation Work Orchestration platform-one that transforms complex organizational processes into clear, intuitive, action-driven experiences. Their UI and UX are central to that mission. They develop their front end using WiseJ, enabling engineers to build rich, enterprise interfaces entirely in C# and .NET-with strongly typed code, centralized controls , and without the typical bloat of sprawling JavaScript frameworks and constantly shifting third-party libraries. Their engineering team is supported by a world-class, fully-managed Figma Design System, including design tokens, responsive variants, and component-compliant wireframes and prototypes. This gives engineers a complete, consistent UI blueprint-freeing them to focus on architecture, performance, and behavior rather than recreating UI patterns from scratch. If you want to build beautifully engineered, large-scale UI systems in an environment designed for clarity and craftsmanship, Nexee is the place. Position Overview: We are seeking a Senior UI Software Engineer to lead development of a an enterprise-grade interface. You will architect highly interactive, intelligent User Interfaces using a unified .NET and WiseJ stack, while collaborating closely with product and design to deliver a first-class user experience. Key Responsibilities • Architect and implement high-performance user interfaces using WiseJ, C#, and .NET, with a strongly typed and unified codebase. • Translate Figma design system components, wireframes, and prototypes directly into consistent, pixel-aligned engineering implementations. • Develop adaptive layouts, multi-panel interfaces, drag-and-drop tools, and other advanced interaction patterns for enterprise-scale use cases. • Maintain clean, composable, reusable UI architecture that avoids unnecessary libraries and minimizes complexity. • Collaborate with UX, product, and backend engineering to ensure seamless integration across all system layers. • Contribute to UI standards, internal tooling, code quality, and mentorship of other engineers. • Team management experience. Qualifications Required • Bachelor's in Computer Science, Engineering, or related field. • 6-10+ years of UI engineering experience with complex, data-heavy, or enterprise platforms. • Strong proficiency in C#, .NET, Visual Studio, and object-oriented UI development. • Experience designing and shipping real-time, component-driven UI systems. • Deep understanding of UI architecture, state management, and interaction modeling. Preferred (Not Required) • Experience with WiseJ or other server-managed UI frameworks. • Experience working with structured Figma design systems, including tokens, variants, and engineering-aligned prototypes. • Background building reusable UI component libraries and internal platform frameworks. • Familiarity with distributed systems, real-time data and workflow automation tools. Why this job? • Competitive salary and benefits • Collaborative, high-talent, on-site engineering culture in Boulder, CO • A unified, strongly typed UI stack-no fractured front-end layers • Direct influence over a platform designed for massive scale • A culture that values clarity, simplicity, craftsmanship, and deep work How to • Competitive salary and benefits. • A flexible and dynamic work environment. • Opportunities for professional growth and development. • A culture that values work-life balance. • The chance to be part of a transformative enterprise solution.
    $87k-109k yearly est. 3d ago
  • Systems Software Engineer

    Sunbelt Controls 3.3company rating

    Senior software engineer job in Denver, CO

    Now Hiring: Systems Software Engineer II 📍 Denver , Colorado | 💰 $108,000 - $135,000 per year 🏢 About the Role We're looking for an experienced Systems Software Engineer II to join Sunbelt Controls, a leading provider of Building Automation System (BAS) solutions across the Western U.S. In this role, you'll develop and program databases, create custom graphics, and integrate control systems for smart buildings. You'll also support project startups, commissioning, and troubleshooting - working closely with project managers and engineers to deliver high-quality, energy-efficient building automation solutions. If you have a passion for technology, problem-solving, and helping create intelligent building systems, this opportunity is for you. ⚙️ What You'll Do Design and program BAS control system databases and graphics for assigned projects. Lead the startup, commissioning, and troubleshooting of control systems. Work with networked systems and diagnose LAN/WAN connectivity issues. Perform pre-functional and functional system testing, including LEED and Title 24 requirements. Manage project documentation, including as-builts and commissioning records. Coordinate with project teams, subcontractors, and clients for smooth execution. Mentor and support junior Systems Software Engineers. 🧠 What We're Looking For 2-5 years of experience in Building Automation Systems or a related field. Associate's degree in a technical field (Bachelor's in Mechanical or Electrical Engineering preferred). Proficiency in MS Office, Windows, and basic TCP/IP networking. Strong organizational skills and the ability to manage multiple priorities. Excellent communication and customer-service skills. Valid Colorado driver's license. 💎 Why You'll Love Working With Us At Sunbelt Controls, we don't just build smart buildings - we build smart careers. As a 100% employee-owned company (ESOP), we offer a supportive, growth-oriented environment where innovation and teamwork thrive. What we offer: Competitive salary: $108K - $135K, based on experience Employee-owned company culture with a family-oriented feel Comprehensive health, dental, and vision coverage Paid time off, holidays, and 401(k)/retirement plan Professional growth, mentorship, and ongoing learning opportunities Veteran-friendly employer & Equal Opportunity workplace 🌍 About Sunbelt Controls Sunbelt Controls is a premier BAS solutions provider serving clients across multiple industries, including data centers, healthcare, education, biotech, and commercial real estate. We specialize in smart building technology, system retrofits, analytics, and energy efficiency - helping clients reduce operational costs and achieve sustainable performance. 👉 Apply today to join a team that's shaping the future of intelligent buildings. #Sunbelt #BuildingAutomation #SystemsEngineer #HVACControls #BASCareers
    $108k-135k yearly 5d ago
  • System Architect

    Compri Consulting 4.0company rating

    Senior software engineer job in Denver, CO

    Client located in Denver is seeking a Windows System Architect/Engineer for a contract to hire position. This person will help assess the current systems environment, make recommendations based on best practices and modern technologies, then help to implement those technologies. The ideal person will have strong hands-on Windows system engineering skills coupled with a strategic mindset. Required: -Expert at designing and implementing Windows systems. -Expert at PowerShell for automation. -Strong virtualization skills (VMware). Desired: -Microsoft certifications. -Cloud expertise. -Familiar with storage tools. -Familiar with backup and recovery tools. -Any networking skills.
    $82k-106k yearly est. 2d ago
  • DevOps Engineer

    Vertex It Systems

    Senior software engineer job in Denver, CO

    As a Senior DevOps Engineer at Vertex IT Systems, you will play a crucial role in designing, implementing, and maintaining infrastructure that supports our applications and services. You will work closely with our development, operations, and security teams to ensure scalable, reliable, and secure environments. This role is ideal for someone with a strong technical background in Linux OS, AWS, and DevOps tools like GitLab, Terraform, and Kubernetes. Job Responsibilities: Design, build, and maintain cloud infrastructure, ensuring high availability and performance. Collaborate with development teams to streamline CI/CD pipelines using tools like GitLab. Manage and optimize AWS environments (AWS certifications preferred but not required). Implement Infrastructure as Code (IaC) solutions using Terraform (preferred) for provisioning infrastructure. Automate system configuration, application deployment, and scaling using programming languages such as Python, Node.js, or Golang (preferred). Manage Kubernetes clusters (preferred) to orchestrate containerized applications. Monitor, troubleshoot, and enhance system performance and reliability. Provide expertise on network fundamentals (TCP/IP layers), ensuring network security and efficiency. Continuously improve infrastructure security, performance, and scalability. Job Skills/Qualification Requirements: Bachelor s Degree in Computer Science, Software Engineering, or a related field. Strong knowledge of network fundamentals including TCP/IP layers. Hands-on experience with Linux OS administration. Proficiency in AWS with practical experience (AWS certifications are a plus but not required). Experience with programming languages like Python, Node.js, and Golang (preferred). Expertise in using GitLab for version control and CI/CD pipelines (required). Familiarity with Infrastructure as Code (IaC) tools, especially Terraform (preferred). Practical experience with Kubernetes for container orchestration (preferred). Strong problem-solving skills and a passion for automation and process improvement. Nice to Have: Experience with other cloud platforms like Google Cloud Platform or Azure. Understanding of monitoring tools (e.g., Prometheus, Grafana). Knowledge of security best practices in DevOps and cloud environments.
    $80k-108k yearly est. 2d ago
  • Sr. Business Intelligence Engineer

    Inceed 4.1company rating

    Senior software engineer job in Lakewood, CO

    Sr. Business Intelligence Engineer Compensation: $125k - $145k (DOE) Inceed has partnered with a great company to help find a skilled Sr. Business Intelligence Engineer to join their team! Join a dynamic and innovative team that is leading the charge in data management and analytics. This exciting role offers the opportunity to work on cutting-edge projects and shape the company's data landscape. Key Responsibilities & Duties: Lead the design and implementation of data lakehouse infrastructure Integrate cloud-based storage for scalability and durability Implement raw data ingestion Optimize data processing frameworks for analytics Required Qualifications & Experience: Minimum eight years of IT experience Six years in data engineering and project planning Three years with Microsoft Fabric or Azure technologies Proven experience in data lakehouse architecture Advanced SQL skills in MS SQL or Oracle databases Experience developing Power BI reports Excellent communication and organizational skills Perks & Benefits: This opportunity includes a comprehensive and competitive benefits package-details will be shared during later stages of the hiring process. Other Information: Hybrid work schedule This position requires a background check and drug test If you are interested in learning more about the Sr. Business Intelligence Engineer opportunity, please submit your resume for consideration. Our client unable to provide sponsorship at this time. We are Inceed, a staffing direct placement firm who believes in the possibility of something better. Our mission is simple: We're here to help every person, whether client, candidate, or employee, find and secure what's better for them. Inceed is an equal opportunity employer. Inceed prohibits discrimination and harassment of any type and affords equal employment opportunities to employees and applicants without regard to race, color, religion, sex, sexual orientation, gender identity, or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
    $125k-145k yearly 3d ago
  • Senior Devops ENgineer (Only USC and GC !!!)

    Ampstek

    Senior software engineer job in Englewood, CO

    Title : Devops Engineer Implementation: Infosys Mode: Face to Face Only USC and GC !!! Job Details Must Have Skills: • DevOps • Python • SQL Detailed Job Description: • Development operations (DevOps) engineers are responsible for the production and ongoing maintenance of a website platform. • They also manage cloud infrastructure and system administration and work with teams to identify and repair issues on an as-needed basis, so strong communication skills are important in this position. • They are generally expected to work well under pressure with tight deadlines for certain tasks, and a proactive demeanor and friendly disposition are also helpful. • DevOps engineers may work with junior and senior engineers, project managers, and executives, as well as administrative assistants, executive assistants, and a receptionist. • Any experience in Python development, data processing, MongoDB Admin or Oracle Middle Ware Admin is an advantage. • Hours can be flexible, though they typically work during regular weekly business hours, and they are not usually responsible for customer/client interaction or supervising junior employees. Kindly share resumes to ********************
    $80k-108k yearly est. 2d ago
  • Senior Java Software Engineer

    Amtex Systems Inc. 4.0company rating

    Senior software engineer job in Denver, CO

    Java Developer with Surescript We are seeking a highly skilled Java Developer with strong expertise in Microservices and Spring Boot. The ideal candidate should have a solid understanding of cloud modernization practices and some exposure to mobile development (iOS or Android). Key Responsibilities: Design, develop, and maintain scalable Java-based applications using Spring Boot and Microservices architecture. Contribute to cloud modernization initiatives, including migration and optimization of existing platforms. Collaborate with cross-functional teams to deliver high-quality software solutions. Participate in code reviews, troubleshooting, and performance tuning. Work closely with mobile development teams to ensure seamless integration across platforms. Required Skills: Strong hands-on experience with Java, Spring Boot, and Microservices. Good understanding of cloud platforms (Azure, or GCP). Knowledge or experience in iOS or Android application development. Familiarity with CI/CD pipelines, RESTful APIs, and containerization (Docker/Kubernetes). Excellent problem-solving and communication skills. Java 21 with minimum 7 years' experience. Preferred Qualifications: Experience in cloud migration or modernization projects. Exposure to DevOps tools and practices. Bachelor's degree in Computer Science, Engineering, or a related field.
    $67k-87k yearly est. 4d ago
  • Senior Application Architect

    The Ash Group

    Senior software engineer job in Denver, CO

    *** W2 Contract Only - No C2C - No 3rd Parties *** The Ash Group is hiring a Senior Application Architect for our client (a specialized financial services subsidiary providing dedicated new home construction financing). This is a Direct Hire role with compensation starting at $160,000 annually, based in Denver, CO (Hybrid setting). This role provides technical leadership in the development and design of robust, scalable applications within the Microsoft Azure environment, with a primary focus on replacing and modernizing existing applications for the client's title services. Role Details Compensation: Annual base salary starting at $160,000. (Eligible for annual bonus based on performance objectives). Benefits: Comprehensive package including Medical, Dental, and Vision coverage. Eligibility for 401(k) Plan, Company-paid disability/basic life insurance, parental leave, tuition reimbursement, and generous PTO (up to 17 days/year for less than 10 years of service). Type: Direct Hire. Location: Hybrid in Denver, CO. (Expect 1-2 days in-office). What You'll Be Doing Lead the design and implementation of application-specific architecture, ensuring robust, scalable, and efficient solutions that align with enterprise standards. Serve as a full-stack C# developer, writing clean, testable code and contributing to the successful delivery of software toward sprint goals. Collaborate with cross-functional teams and other architects to refine requirements, optimize development processes, and align technical solutions with business goals. Troubleshoot complex technical challenges and proactively identify/resolve issues to maintain system stability and performance. Mentor junior technical resources through code reviews, pair programming, and continuous coaching regarding technical skills and behaviors. What We're Looking For 8-10 years of software development experience and technical leadership, with a minimum of 2+ years developing technical road maps. Expertise as a full-stack C# developer using the Microsoft technology stack (.Net Core, Web API, Web Services). Strong relational database skills, including writing complex SQL, creating stored procedures, and analyzing query plans. Proven experience with Agile methodologies and DevOps practices, including managing and presenting technical solutions. Deep knowledge of Cloud development on the Microsoft Azure platform. Strong technical background in various technologies: Vue.js, MS SQL Server, ASP.Net, MVC, and Web Services/SOA. Apply today to join a dynamic team supporting critical infrastructure projects. #ApplicationArchitect #C#Developer #AzureCloud #DirectHire #DenverJobs #FinTech
    $160k yearly 1d ago

Learn more about senior software engineer jobs

How much does a senior software engineer earn in Thornton, CO?

The average senior software engineer in Thornton, CO earns between $71,000 and $120,000 annually. This compares to the national average senior software engineer range of $86,000 to $151,000.

Average senior software engineer salary in Thornton, CO

$93,000

What are the biggest employers of Senior Software Engineers in Thornton, CO?

The biggest employers of Senior Software Engineers in Thornton, CO are:
  1. Oracle
  2. Medtronic
  3. Vail Resorts
  4. Anduril
  5. Gogo Business Aviation
  6. Trimble
  7. Katalyst Technologies
  8. BAE Systems
  9. Inovonics
  10. Publicis Groupe
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