Mid-level full stack developer (typescript and azure)

We are seeking a talented and motivated Mid-Level Full Stack Developer to join our engineering team. In this role, you will design, develop, and maintain end-to-end web applications using modern JavaScript/TypeScript technologies across the stack. You will collaborate closely with product managers, designers, and fellow engineers to deliver scalable, high-quality, visually polished software that delivers real value to our users.

Candidate MUST: Be a U.S. citizen or Green Card holder (Permanent Resident) who is currently located in the United States for the current three consecutive years, with the Ability to obtain a level 4 Public Trust Clearance.

*Preference for candidates who are local to the Washington, DC, VA and MD areas.

Key Responsibilities

• 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.

Required Qualifications

• 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.
• Experience working with Azure cloud services.
• 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).

Highly Preferred Qualifications

• Experience building and deploying Azure Static Web Apps.
• Hands-on experience with a headless CMS (Contentful, Strapi, Sanity, Sitecore, or similar).
• Experience with CI/CD using GitHub Actions and applying GitOps principles.
• Practical use of GitHub Copilot in day-to-day development.
• Experience working in GitHub Codespaces or similar cloud development environments.
• Familiarity with GitHub Advanced Security (CodeQL, secret scanning, Dependabot alerts).
• Exposure to NoSQL databases (MongoDB, DynamoDB, Redis).
• Familiarity with infrastructure-as-code (Bicep, Terraform, or ARM templates).
• Experience with accessibility testing tools and remediation for Section 508 / WCAG 2.1 AA compliance.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting: June 11, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.