Front end developer jobs in Simi Valley, CA - 218 jobs

The Application Developer will: Use the latest tools and techniques, including Ruby on Rails, Git, AI-assisted coding tools, and Agile methodologies. Leverage RSpec and Capybara for automated testing, ensuring high-quality TDD/BDD practices. Build and support RESTful APIs, microservices, and enterprise-grade web applications. Prepare software for deployment using CI/CD pipelines and containerization tools like Docker. Respond to and resolve complex bugs and performance bottlenecks logged by users of a live production system. Manage small projects independently while serving as a technical lead or mentor on larger, cross-functional initiatives. Work in Linux/Unix environments and optimize development workflows using tools like VS Code or RubyMine. Utilize AWS (EC2, RDS, S3) for scalable cloud-based development and deployment. Establish rigorous test plans through the design and implementation phases, tracking results to ensure all changes meet finalized business requirements. Demonstrate behaviors aligned with the organization's culture, emphasizing collaboration, transparency, and continuous improvement. Perform other related duties as required and assigned. *Skills* Ruby, Ruby on rails, Javascript *Top Skills Details* Ruby,Ruby on rails,Javascript *Additional Skills & Qualifications* Education: Bachelor's degree in Computer Science, Engineering, or equivalent professional work experience. Ruby on Rails Expertise: 7 years of experience in software development, with a primary focus on the Ruby on Rails framework and building scalable web applications. Business Logic & Rules: 3 years of experience working with complex business logic engines or state machines (e.g., AASM, Workflow, or custom rule engines). Testing Mastery: Deep experience with RSpec, MiniTest, and integration testing suites. Version Control: 3 years of experience with Git, including advanced branching and merging strategies. Environment & Infrastructure: Proven experience working in Linux environments and managing cloud infrastructure via AWS. Technical Stack: Proficiency with SQL (PostgreSQL/MySQL), Redis, and modern IDEs like VS Code. AI Tooling: Experience with Cursor, GitHub Copilot, or other AI-augmented development tools is highly preferred. *Workplace Type:* *Onsite 5 days a week in Westlake Village, CA or Carrolton, TX* *Job Type & Location*This is a Contract to Hire position based out of Westlake Village, CA. *Pay and Benefits*The pay range for this position is $60.00 - $72.11/hr. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: * Medical, dental & vision * Critical Illness, Accident, and Hospital * 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available * Life Insurance (Voluntary Life & AD&D for the employee and dependents) * Short and long-term disability * Health Spending Account (HSA) * Transportation benefits * Employee Assistance Program * Time Off/Leave (PTO, Vacation or Sick Leave) *Workplace Type*This is a fully onsite position in Westlake Village,CA. *Application Deadline*This position is anticipated to close on Jan 19, 2026. h4>About TEKsystems: We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company. The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. About TEKsystems and TEKsystems Global Services We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.