Senior Back-End Developer- C# / .NET 8 / Azure Functions / APIM / SQL

General Dynamics Information Technology

16h • Remote

About The Position

GDIT is seeking a Senior Back-End Developer to design, build, and support backend services for a modern healthcare self-service portal hosted on Microsoft Azure. This role is responsible for developing secure, scalable, and maintainable APIs and backend processing components using C# and .NET 8 Azure Functions, Azure API Management, and Azure SQL. work visa sponsorship will not be considered for this position. The ideal candidate has strong experience building cloud-native backend solutions in Azure, including HTTP-based APIs, event-driven processing patterns, dependency injection, and secure integrations with external systems. This position will support a regulated healthcare environment and requires close collaboration with front-end developers, architects, DevOps engineers, security teams, and business stakeholders to deliver reliable services for member, provider, and operational workflows.

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, Information Systems, or a related field. Relevant additional experience may be substituted in lieu of degree requirements.
• 5 or more years of experience in backend software development.
• 3 or more years of hands-on experience building solutions in Microsoft Azure.
• Strong hands-on experience with C# and .NET, including Azure Functions development.
• Experience developing Azure Functions using HTTP triggers and familiarity with event-driven trigger patterns such as Service Bus, Blob Storage, and Timer triggers.
• Strong experience with Azure API Management.
• Experience implementing dependency injection, service abstractions, and maintainable backend design patterns.
• Experience integrating with external APIs using secure and resilient design patterns.
• Experience with Azure SQL, including data modeling, indexing, schema design, query optimization, and database performance tuning.
• Experience using Entity Framework Core or similar ORM frameworks in enterprise application development.
• Hands-on experience implementing authentication and authorization with Microsoft Entra ID, including External ID / CIAM concepts, claims, and API protection.
• Experience integrating backend APIs with modern front-end applications and enterprise systems.
• Experience with source control, build pipelines, and release processes in Azure DevOps.
• Strong understanding of REST API design, secure coding practices, data protection, and operational support in regulated cloud environments.
• Experience working in environments subject to healthcare, government, or other regulated compliance requirements.
• Ability to obtain and maintain required federal security clearance or public trust as applicable.

Nice To Haves

• Microsoft Certified: Azure Developer Associate.
• Microsoft Certified: Azure Solutions Architect Expert.
• Experience supporting Azure-hosted healthcare, government, or other regulated applications.
• Experience with Azure Application Insights, monitoring, distributed tracing, and production diagnostics.
• Experience with automated testing frameworks, mocking frameworks, and API integration testing.
• Experience with code quality and security scanning tools such as SonarCloud or similar platforms.
• Experience with Agile delivery practices and tools such as Azure Boards or JIRA.
• Experience integrating with case management, claims, identity, communications, or other healthcare-related external systems.
• Familiarity with secure private Azure environments, network-restricted services, and production support in compliance-driven environments.

Responsibilities

• Design, develop, and maintain backend APIs and business services using C# and .NET 8 Azure Functions.
• Build and support Azure Functions using HTTP triggers as well as event-driven triggers such as Service Bus, Blob Storage, and Timer triggers where appropriate.
• Implement dependency injection and modular service design to create reusable, testable, and maintainable backend components.
• Develop services that integrate with external APIs, enterprise platforms, and healthcare-related systems, including authentication, error handling, retries, resiliency, and monitoring.
• Build, secure, publish, and manage APIs through Azure API Management, including routing, versioning, throttling, policy enforcement, and diagnostics.
• Implement data access and business logic using Azure SQL and Entity Framework Core, including schema design, indexing, query tuning, and performance optimization.
• Develop secure integrations between Azure-hosted applications and downstream systems while protecting sensitive healthcare and operational data.
• Implement authentication and authorization using Microsoft Entra External ID / CIAM and enforce role-based and claims-based access to backend services.
• Support persona-based workflows for members, providers, and internal operational users across portal features and backend processes.
• Create and maintain unit tests, integration tests, and API test coverage to support reliable automated delivery and maintain high code quality.
• Partner with DevOps engineers to support CI/CD pipelines in Azure DevOps, environment promotion, configuration management, deployment automation, and operational readiness.
• Implement structured logging, telemetry, exception handling, and health monitoring to support supportability, production troubleshooting, and system reliability.
• Document APIs, data flows, integration patterns, technical designs, and operational procedures to support maintainability and onboarding.
• Troubleshoot and resolve backend issues involving performance, reliability, scalability, security, and production support.
• Ensure solutions align with secure coding practices and compliance requirements for FedRAMP, HIPAA, FISMA, and other applicable standards.

Benefits

• Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match.
• To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave.
• GDIT typically provides new employees with 15 days of paid leave per calendar year to be used for vacations, personal business, and illness and an additional 10 paid holidays per year.
• Paid leave and paid holidays are prorated based on the employee’s date of hire.
• The GDIT Paid Family Leave program provides a total of up to 160 hours of paid leave in a rolling 12 month period for eligible employees.
• To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available.
• We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level