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Leidos is an innovation company rapidly addressing the world’s most vexing challenges in national security and health.
Mid-level Full Stack Developer, Typescript
Location
District Of Columbia + 2 moreAll locations: District Of Columbia | Maryland | Virginia
Posted
5 days ago
Salary
$87.1K - $157.5K / year
Seniority
Senior
Job Description
Mid-level Full Stack Developer, Typescript
Leidos
• Design, develop, test, and deploy full-stack web applications using modern JavaScript/TypeScript frameworks (React, Angular, Node.js) across the frontend and backend. • Build and maintain RESTful APIs and serverless/microservice components that are secure, performant, and well-documented. • Develop responsive, user-friendly, and visually compelling interfaces following UX/UI best practices and accessibility standards (Section 508 compliance). • Build and maintain Azure Static Web Apps and integrate with headless CMS platforms (e.g., Payload, Contentful, Strapi, Sanity, Sitecore, or similar) to power content-driven experiences. • Implement and follow GitHub Flow branching strategies and GitOps practices for reliable, traceable deployments. • Leverage GitHub Copilot to accelerate development while maintaining code quality and ownership. • Use GitHub Codespaces for consistent, cloud-based development environments across the team. • Integrate and act on findings from GitHub Advanced Security (CodeQL, secret scanning, Dependabot) to keep applications secure by default. • Participate in code reviews, providing constructive feedback and learning from peers. • Work with relational (PostgreSQL, MySQL) and/or NoSQL (MongoDB, Redis) databases — designing schemas, writing efficient queries, and optimizing performance. • Collaborate in an Agile/Scrum environment, contributing to sprint planning, stand-ups, and retrospectives. • Troubleshoot, debug, and resolve production issues across the full stack. • Contribute to CI/CD pipelines (GitHub Actions) and participate in deployment activities. • Mentor junior developers and share knowledge through documentation and tech talks.
Job Requirements
- Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience).
- Minimum of 4 years of professional software development experience.
- Strong proficiency in JavaScript (ES6+) and TypeScript across both frontend and backend (Node.js).
- Hands-on experience with at least one modern frontend framework: React or Angular.
- Solid understanding of HTML5, CSS3, and modern responsive design techniques.
- Design-heavy experience with a portfolio of public-facing sites that demonstrates strong visual design sensibility, attention to detail, and user-centered thinking.
- Experience designing and consuming RESTful APIs; familiarity with JSON and HTTP standards.
- Proficiency with SQL and experience with relational databases (PostgreSQL or MySQL).
- Experience with Git and GitHub Flow workflows on GitHub.
- Understanding of Agile methodologies and tools (Jira, Confluence).
Benefits
- competitive compensation
- Health and Wellness programs
- Income Protection
- Paid Leave
- Retirement
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