Senior Backend/API Developer

Avion SolutionsHuntsville, AL
13h

About The Position

Avion Solutions Inc., an employee-owned company, is seeking candidates for a Senior Backend/API Developer to support the Missile Defense Agency (MDA). This position is located in Huntsville, AL.

Requirements

  • 5–10+ years of professional software development experience.
  • Strong proficiency in C# and the .NET ecosystem (including .NET Framework 4.8 and/or .NET 5+).
  • Proven experience designing and building RESTful APIs and backend services.
  • Experience working in production environments with real-world users, data, and operational constraints.
  • Solid understanding of software architecture principles (layered architecture, service boundaries, separation of concerns).
  • Experience in debugging and maintaining complex systems over time.
  • Ability to work independently and take ownership of backend systems.
  • Must be a U.S. citizen and have an active DoD Secret Security Clearance.
  • Must be able to travel up to 10% of the time.

Responsibilities

  • Design, develop, and maintain RESTful APIs and backend services using C# and the .NET ecosystem.
  • Build and support service-oriented architectures that enable modular, maintainable application design.
  • Integrate backend systems with external or internal AI/ML services (API consumption, data exchange, orchestration).
  • Collaborate with frontend developers to define API contracts and ensure seamless UI integration
  • Support application lifecycle activities, including debugging, performance tuning, and production issue resolution.
  • Contribute to architectural decisions, including service boundaries, data flow, and system design patterns.
  • Ensure code quality through testing, code reviews, and adherence to development standards.
  • Participate in deployment and release processes.
  • Document system design, APIs, and key technical decisions for long-term maintainability.
  • Other duties as assigned.
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