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Full Stack Developer (React / .NET)

A1FED
3 days ago
Full-time
On-site
Frederick, Maryland, United States
Overview
We’re looking for a Full Stack Developer to help build and enhance mission-critical web applications that support daily operations for a federal agency. In this role, you’ll work across the full technology stack—developing modern user interfaces, building robust APIs, and ensuring secure, high-performing applications.
This is an opportunity to work on systems that directly impact real-world operations, in a collaborative environment that values clean code, thoughtful design, and continuous improvement.
What You’ll Do
Build & Enhance Applications
  • Design, develop, and maintain web applications supporting critical agency functions
  • Deliver new features, improve performance, and troubleshoot issues
  • Ensure applications meet security, usability, and reliability standards
Front-End Development
  • Develop responsive, modern UIs using React and TypeScript
  • Work with HTML5, CSS, and JSON to create dynamic user experiences
  • Debug and optimize applications using browser developer tools
  • Apply MVC principles and front-end best practices
Back-End Development
  • Build and maintain APIs and backend services using C# and .NET Framework
  • Design and optimize SQL queries, stored procedures, and database structures
  • Implement object-oriented solutions and reusable components
  • Generate structured outputs (reports, Excel, PDFs)
DevOps & Collaboration
  • Manage code using Git and GitHub (branching, PRs, code reviews)
  • Deploy builds and support development environments
  • Collaborate with team members in an Agile or iterative workflow
Security & Compliance
  • Follow secure coding practices and STIG compliance requirements
  • Support authentication, role-based access, and application security features
  • Maintain clear and thorough technical documentation
What You Bring
Required Qualifications
  • Bachelor’s degree in Computer Science, Information Systems, or related field
    (or 5+ years of professional programming experience)
  • 2+ years of experience with:
    • React, TypeScript, JavaScript
    • C# and .NET Framework
    • SQL and relational databases
    • HTML/CSS, JSON, XML
  • Experience with:
    • API development and web services
    • Object-oriented design and MVC architecture
    • Application security (authentication, roles, etc.)
Nice to Have
  • Experience in government, DoD, or regulated environments
  • Familiarity with STIGs or secure coding standards
  • Experience working in Agile teams
  • Strong debugging and problem-solving skills
  • Experience with SQL Server Management Studio
Tech Stack
  • Front-End: React, TypeScript, Ext JS, HTML5, CSS
  • Back-End: .NET Framework (C#), SQL Server, XML
  • Tools: VS Code, Visual Studio, IIS Express, NuGet
  • DevOps: Git, GitHub
Work Environment
  • Hybrid schedule: 2 days onsite (Tuesday required), up to 3 days remote
  • Consistent weekly schedule in coordination with government leadership
  • Collaborative, team-oriented environment with meaningful project work
Why Join Us
  • Work on mission-driven applications that support real operations
  • Opportunity to grow your full stack skill set across modern technologies
  • Balance of onsite collaboration and remote flexibility