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Senior Full Stack Developer

MissionStaff

Salary not specified
Sep 16, 2025
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Connect top talent in Business Services, Tech, Marketing & Creative with companies of all sizes—offering flexible, high-touch staffing solutions. Filling a contract position for a Full-Stack Developer (React + C-Sharp/.NET) for a client in the Philadelphia area.

Requirements

  • Strong proficiency with React and related tools (Hooks, Redux, React Router).
  • Solid experience with C-Sharp/.NET (ASP.NET Core, Entity Framework, Web APIs).
  • Experience with relational databases such as SQL Server or PostgreSQL.
  • Familiarity with CI/CD pipelines and cloud platforms (Azure or AWS).
  • Knowledge of best practices in security, testing, and performance optimization.
  • Experience with microservices or serverless architectures.
  • Familiarity with containerization (Docker, Kubernetes).

Responsibilities

  • Design, develop, and maintain full-stack web applications using React (front end) and C-Sharp/.NET (back end).
  • Collaborate with designers, product managers, and other engineers to deliver high-quality features.
  • Build RESTful APIs and integrate third-party services.
  • Write clean, maintainable, and testable code.
  • Optimize application performance and scalability.
  • Participate in code reviews and mentor junior developers when needed.
  • Contribute to architecture and technical design discussions.

Other

  • 3+ years of professional experience as a Full-Stack Developer (or equivalent).
  • Currently based in Philadelphia, PA or willing to relocate.
  • Exposure to Agile/Scrum methodologies.
  • Collaborative and supportive team culture.