Senior Backend / API Developer (Job ID:4208) Job at Valkyrie Enterprises in Hunt
Valkyrie Enterprises, Huntsville, AL, United States
Valkyrie Enterprises has an immediate need for a Senior Sr Backend / API Developer (.NET Focus)on-site in Huntsville, AL .
Join the team responsible for the Missile Defense System (MDS) Ground Test (GT) scenario design for the Missile Defense Agency (MDA).
MDA GTs are used to assess our nation’s defense systems through a variety of HWIL and simulation tests.
Excellent opportunity to work oncutting-edgedefense technologies while contributing to the security of our nation.
Job Description
Primary backendengineerresponsible for designing, building, andmaintainingAPIs and service layers that power a suite of web applications.
The position emphasizes reliability, maintainability, and scalability of backend systems, with a strong focus on structured data, service architecture, and integration with downstream systems (including AI-enabled features via external services).
Hands-on engineering role embedded within a development team, working closely with frontend developers, database specialists, and DevOps personnel to deliver production-grade software in a controlled, enterprise environment.
Design, develop, andmaintainRESTful 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
Target Candidate
Strong, independent backend engineer who can take ownership of systems end-to-end
Comfortable working in structured, sometimes constrained environments
Prioritizes **robustness, performance, and maintainability** over surface-level features
Able to navigate ambiguity and contribute to evolving system architecture
Effective collaborator with both frontend developers and infrastructure teams
Qualifications
Must have a BS in Engineering, Math, Physics, or similar technical discipline and at least 5–10+ years of professional software development experience.
Must have strong proficiency in C# and the .NET ecosystem (including .NET Framework 4.8 and/or .NET 5+).
Must have proven experience designing and building RESTful APIs and backend services.
Must have experience working in production environments with real-world users, data, and operational constraints.
Must have a solid understanding of software architecture principles (layered architecture, service boundaries, separation of concerns).
Must have experience debugging and maintaining complex systems over time.
Must have the ability to work independently and take ownership of backend systems.
Desired Qualifications
Experience integrating with AI/ML services (REST APIs, data pipelines, inference workflows), preferred.
Familiarity with Azure DevOps (build/release pipelines, repos, work items), preferred.
Experience working in controlled or restricted environments (e.g., air-gapped systems, secure networks), preferred.
Understanding of authentication/authorization patterns (e.g., role-based access, enterprise auth systems) , preferred.
Agile / Scrum team experience, preferred.
Active SECRET security clearance, preferred.
Security Requirements
Must have the ability to obtain and maintain a Secret clearance.
Travel Requirements
Occasionalor NoTravel- less than 10%.
If position requires travel by domestic flight or access to secure federal facilities/military bases, candidate must be able to obtain (by start of position) and maintain appropriate identification credentials, such as REAL ID. (More information regarding REAL ID can be found: https://www.dhs.gov/real-id)
Physical Requirements
Remainingin a stationary position.
Moving about toaccomplishtasks or moving from one worksite to another
Communicating with others to exchange information
Repeating motions that may include the wrists,handsand/or fingers.
Light work that includes moving objects up to 20 pounds.
Valkyrie strictly adheres to a policy of equal employment opportunity. This policy is based on Valkyrie’s commitment to hire and retain qualified employees consistent with positionrequirements; and to seek, employ, promote and treat all employees and applicants for employment without regard to race, color, religious creed, national origin, ancestry, citizenship status, pregnancy, childbirth, physical disability, mental disability, age, military status or protected veteran status, marital status, registered domestic partner or civil union status, gender (including sex stereotyping and gender identity or expression), medical condition, genetic information or sexual orientation or other protected characteristics.
Additionally, Valkyrie Enterprises provides a variety of benefits to eligible employees to support your best health, wellness, and future, to include medical/dental/vision options, company paid life and disability insurances, 401k with match, education reimbursement, as well as company paid holidays and paid time off (PTO).
#J-18808-Ljbffr
Join the team responsible for the Missile Defense System (MDS) Ground Test (GT) scenario design for the Missile Defense Agency (MDA).
MDA GTs are used to assess our nation’s defense systems through a variety of HWIL and simulation tests.
Excellent opportunity to work oncutting-edgedefense technologies while contributing to the security of our nation.
Job Description
Primary backendengineerresponsible for designing, building, andmaintainingAPIs and service layers that power a suite of web applications.
The position emphasizes reliability, maintainability, and scalability of backend systems, with a strong focus on structured data, service architecture, and integration with downstream systems (including AI-enabled features via external services).
Hands-on engineering role embedded within a development team, working closely with frontend developers, database specialists, and DevOps personnel to deliver production-grade software in a controlled, enterprise environment.
Design, develop, andmaintainRESTful 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
Target Candidate
Strong, independent backend engineer who can take ownership of systems end-to-end
Comfortable working in structured, sometimes constrained environments
Prioritizes **robustness, performance, and maintainability** over surface-level features
Able to navigate ambiguity and contribute to evolving system architecture
Effective collaborator with both frontend developers and infrastructure teams
Qualifications
Must have a BS in Engineering, Math, Physics, or similar technical discipline and at least 5–10+ years of professional software development experience.
Must have strong proficiency in C# and the .NET ecosystem (including .NET Framework 4.8 and/or .NET 5+).
Must have proven experience designing and building RESTful APIs and backend services.
Must have experience working in production environments with real-world users, data, and operational constraints.
Must have a solid understanding of software architecture principles (layered architecture, service boundaries, separation of concerns).
Must have experience debugging and maintaining complex systems over time.
Must have the ability to work independently and take ownership of backend systems.
Desired Qualifications
Experience integrating with AI/ML services (REST APIs, data pipelines, inference workflows), preferred.
Familiarity with Azure DevOps (build/release pipelines, repos, work items), preferred.
Experience working in controlled or restricted environments (e.g., air-gapped systems, secure networks), preferred.
Understanding of authentication/authorization patterns (e.g., role-based access, enterprise auth systems) , preferred.
Agile / Scrum team experience, preferred.
Active SECRET security clearance, preferred.
Security Requirements
Must have the ability to obtain and maintain a Secret clearance.
Travel Requirements
Occasionalor NoTravel- less than 10%.
If position requires travel by domestic flight or access to secure federal facilities/military bases, candidate must be able to obtain (by start of position) and maintain appropriate identification credentials, such as REAL ID. (More information regarding REAL ID can be found: https://www.dhs.gov/real-id)
Physical Requirements
Remainingin a stationary position.
Moving about toaccomplishtasks or moving from one worksite to another
Communicating with others to exchange information
Repeating motions that may include the wrists,handsand/or fingers.
Light work that includes moving objects up to 20 pounds.
Valkyrie strictly adheres to a policy of equal employment opportunity. This policy is based on Valkyrie’s commitment to hire and retain qualified employees consistent with positionrequirements; and to seek, employ, promote and treat all employees and applicants for employment without regard to race, color, religious creed, national origin, ancestry, citizenship status, pregnancy, childbirth, physical disability, mental disability, age, military status or protected veteran status, marital status, registered domestic partner or civil union status, gender (including sex stereotyping and gender identity or expression), medical condition, genetic information or sexual orientation or other protected characteristics.
Additionally, Valkyrie Enterprises provides a variety of benefits to eligible employees to support your best health, wellness, and future, to include medical/dental/vision options, company paid life and disability insurances, 401k with match, education reimbursement, as well as company paid holidays and paid time off (PTO).
#J-18808-Ljbffr