Senior Full Stack Java Developer (fully onsite) with Security Clearance

Senior Full Stack Software Engineer
Location: Washington, DC (100% On-Site)
Clearance: Active Top Secret required
Hourly W2 Rate: $71-92/hr Overview
We are seeking a Senior Full Stack Software Engineer to support the development of a mission-critical federal platform focused on modernizing enterprise data and application capabilities. This role is part of an established Agile development team delivering new functionality, enhancing existing systems, and supporting a high-visibility production release.
The ideal candidate has strong experience building and delivering large-scale enterprise applications and is comfortable contributing across the full software development lifecycle.

Key Responsibilities Design, develop, and maintain full-stack applications across both front-end and back-end components
Build and enhance web-based user interfaces and backend services to support evolving system requirements
Develop and integrate custom features and capabilities within an existing codebase
Participate in requirements gathering, system design, development, testing, and quality assurance activities
Conduct code reviews and contribute to architectural discussions and design decisions
Collaborate with cross-functional teams including product, business, and testing stakeholders to ensure alignment with requirements and delivery timelines
Support application deployment processes, version control practices, and CI/CD pipelines
Assist in automating and improving operational and maintenance workflows
Ensure adherence to security guidelines, accessibility standards, and enterprise development best practices Required Qualifications Active Top Secret clearance
Bachelor’s degree in Information Technology, Computer Science, or related field, OR equivalent experience
8+ years of full stack development experience
Strong proficiency with Java, JavaScript/TypeScript, and modern front-end frameworks
Experience working with relational databases and writing complex queries (PostgreSQL or similar)
Experience developing and consuming RESTful APIs
Familiarity with CI/CD pipelines, version control systems (e.g., Git), and containerized environments
Experience working in Agile development environments
Ability to collaborate effectively within a cross-functional engineering team What Makes a Strong Candidate Experience delivering large-scale enterprise applications from concept through deployment
Strong understanding of software engineering best practices and modern development frameworks
Ability to balance frontend usability with backend performance and scalability
Comfortable working in secure, mission-driven environments with compliance requirements
Strong communicator who can work across technical and non-technical teams