Senior Backend / API Developer

We are seeking an experienced and highly capable Senior Backend / API Developer to join our software engineering team. This role is responsible for designing, developing, and maintaining robust backend systems and service layers that power a suite of enterprise web applications. The position emphasizes reliability, scalability, and long-term maintainability of backend services, with a strong focus on structured data, service architecture, and integration with downstream systems, including AI-enabled capabilities via external services. The ideal candidate will demonstrate strong technical expertise in the .NET ecosystem, sound engineering judgment, and the ability to collaborate effectively across frontend, database, and DevOps teams within a controlled, enterprise environment., * Design, develop, and maintain RESTful APIs and backend services using C# and the .NET ecosystem.

• Build and support service-oriented architectures that promote modular, scalable, and maintainable application design.
• Integrate backend systems with internal and external services, including AI/ML platforms, through API consumption, data exchange, and orchestration.
• Collaborate with frontend developers to define API contracts and ensure seamless integration between user interfaces and backend systems.
• Support the full application lifecycle, including debugging, performance tuning, and resolution of production issues.
• Contribute to architectural decisions, including service boundaries, data flow, and system design patterns.
• Ensure code quality through testing, peer reviews, and adherence to established development standards.
• Participate in deployment and release processes, working closely with DevOps personnel.
• Document system architecture, APIs, and technical decisions to support long-term maintainability and knowledge sharing.
• Work independently, prioritize tasks effectively, and deliver high-quality solutions in a structured, team-oriented environment., MANTECH is seeking a motivated, career and customer-oriented Senior Program Security Officer to join our team in Huntsville, AL. The Compliance and Training Directorate contractor …

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• 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+.
• Demonstrated 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, including layered architecture, service boundaries, and separation of concerns.
• Proven ability to debug, maintain, and enhance complex systems over time.
• Strong written and verbal communication skills, with the ability to collaborate effectively across technical and non-technical teams.
• Ability to take ownership of backend systems and deliver solutions with minimal oversight., * Experience integrating with AI/ML services, including REST APIs, data pipelines, and inference workflows.
• Familiarity with Azure DevOps, including build and release pipelines, repositories, and work item tracking.
• Experience working in controlled or restricted environments, such as secure or air-gapped systems.
• Familiarity with frontend technologies (e.g., JavaScript, MVC frameworks) to support cross-functional collaboration.
• Understanding of authentication and authorization patterns, including role-based access control and enterprise identity systems.
• Experience working in Agile or Scrum development environments.

About DESE: For the past 43 years, DESE has provided industry-leading technical and engineering solutions in the fields of Defense, Energy, Space, and Environment. As a small, family-oriented business, DESE provides a compelling benefits package including a generous profit-sharing plan, competitive salaries, and perhaps most importantly, the opportunity to work alongside talented engineers leveraging cutting-edge technologies to solve complex and engaging problems. Why employees love working for DESE: At DESE, we are committed to creating a company that is known for its respect and care for employees. We understand that happy employees are what keeps our business going and we strive to provide the best opportunities for each individual working on our team! Here are a few reasons you will love working here:

• Competitive health, dental and vision insurance with affordable premiums
• Flexible work schedules
• Two different flexible spending account options
• Company paid life insurance with options for employee paid additional
• Performance bonus program
• Education reimbursement program
• Company paid personal leave for approved philanthropic activities
• Vacation, Sick & Holiday leave
• Robust 401k profit sharing plan
• Opportunities for internal promotions
• Employee referral incentive program
• Rewards and gifts for service anniversaries, + $131,300-237,350 per year