Mid-level Full Stack Developer
Washington, DC
Experience: 5
Education: BA
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Job ID: 349070
Date Posted: 04/10/2026
Shortcut: http://jobs.systemone.com/Rdz2xo
Mid-level Full Stack Developer (UI heavy)
Washington, DC – hybrid (3 days a week onsite)
Candidates must be able to work without sponsorship
Must be able to obtain Public Trust clearance
6 month contract
System One is seeking a mid-level Full Stack Developer to work for a large government contractor.
This is your opportunity to work with a highly talented team that builds technology for the community needs. Our client engagement processes, the way we collaborate, operate, and deliver value provides an unparalleled opportunity to grow and advance. Choose us and make delivering innovative work part of your extraordinary career.
Goal of the work: Rewrite of one their our old apps. A full stack developer who is strong on the UI front using Angular, React, and or Bootstrap. We need someone who sees the old code and wants and knows how to fix it.
Education and Experience Requirement:
• Undergraduate degree (BA/BS), preferably in a technical discipline
• 5+ years’ experience with modern software development
Requirements/Responsibilities:
• Demonstrated knowledge and experience with modern software development (e.g., Java (J2EE), Python script, JavaScript, SQL, T-SQL, Linux Shell script, JSP, etc. as part of a development team utilizing strict configuration management practices e.g., git, Bitbucket, Gitlab, GitHub).
• Provide design and development expertise in support of both new application development and application support/maintenance tasks.
• Support several applications and be responsible for all phases of the build process from planning to design, development, release, and support.
• Identify and implement development standards and best practices.
• Conduct solution analyses and provide recommendations on application improvements.
• Deliver development artifacts as required by the customer.
• Adhere to the client configuration management control and QA policies.
• Demonstrate strong analytical, troubleshoot, and problem-solving skills.
• You’ll Bring These Qualifications:
• Experience in providing technical recommendations and strategic planning insights.
• Experience with modern web application development to include JavaScript, Node.js, Angular or React.
• Experience with Microsoft Databases
• Experience with AWS - Cloud Technologies
• Experience with Microsoft SQL and T-SQL
• Experience with industry standard build, packaging, and deployment tools such as Gitlab, Maven, and ANT
• Experience with at least one lightweight scripting language, e.g. Perl, Bash, Python
• Experience in using web frameworks such as AJAX, Struts, Hibernate, Bootstrap and Spring, etc.
• Experience in creating and using EJBs
• Shell scripting experience in major operating system, e.g., Windows and Linux.
• Provide web-based application development support in Java for a range of custom-built applications.
• Excellent oral and written communication skills.
• Familiar with Atlassian toolset (Jira, Confluence, Crucible)
• Experience with Crystal Reports
• Experience with OpenShift and Okta
• Ability to obtain and maintain Public Trust clearance.
• These Qualifications Would be Nice to Have:
• Experience with Agile Scrum or similar methodology
• Experience with DevSecOps and/or CI/CD
• Experience with SQL Server Integration Services (SSIS) and SSIS package
• Familiar with Data Warehouse ETL
• Familiar with Load Testing tool (Apache JMeter or LoadRunner)
System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.
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