.NET Back End Developer

KEY RESPONSIBILITIES

•    Build ASP.NET Core services and Azure Functions using modern C#/.NET, including APIs for steering, telemetry, audit, tool execution, and agent runtime support.
•    Implement secure APIs behind Entra and API Management, including pause/resume/kill/override/redirect controls and other operational commands required by the ACC.
•    Develop durable orchestrations for long-running agent loops, serverless workflows, retries, idempotency, circuit-breakers, and reliable data access patterns.
•    Design and build integration services and MCP servers that expose entity data and tools safely to agents through governed endpoints.
•    Implement OAuth/OIDC, on-behalf-of flows, scoped credentials, short-lived tokens, least-privilege access, and secure tool argument schemas.
•    Integrate with legacy and modern enterprise systems using APIs, Logic Apps, webMethods, .NET/TypeScript/Python SDKs, and event/integration patterns where appropriate.
•    Emit audit logs, application telemetry, trace IDs, and operational metrics for every meaningful system and agent action.
•    Work closely with AI engineers, cloud DevOps, data developers, front-end engineers, governance, and delivery teams to move services from sandbox to production.

KEY REQUIREMENTS

•    Strong hands-on C# and .NET 8/9 experience, including ASP.NET Core, REST APIs, Azure Functions isolated worker, and secure API design.
•    Experience with distributed systems patterns, async programming, retries, idempotency, circuit-breakers, background jobs, durable workflows, and operational reliability.
•    Experience with Azure API Management, Microsoft Entra, OAuth/OIDC, MSAL, managed identities, Key Vault, and role-based access control.
•    Practical experience with data access using EF Core and at least one of Azure SQL, PostgreSQL, Cosmos DB, Redis, or comparable data stores.
•    API and integration engineering experience, including enterprise integration patterns, API contracts, versioning, contract testing, and secure connectivity.
•    Understanding of MCP (Model Context Protocol) or willingness to build MCP endpoints using .NET/TypeScript/Python SDKs as governed integration contracts for agents.
•    Strong testing, debugging, performance tuning, logging, and CI/CD collaboration habits.

PREFERRED QUALIFICATIONS

•    Semantic Kernel for .NET, Dapr, gRPC, durable agent-loop hosting, or high-reliability service design experience.
•    Experience with Azure API Center, Logic Apps, webMethods, event-driven integration, iPaaS, or complex enterprise integration environments.
•    Experience building services that support AI agents, tool calling, HITL workflows, audit-ledger operation, or observability-heavy platforms.
•    Familiarity with sovereign cloud, government, regulated environments, security reviews, data residency, and least-privilege design.
•    Experience collaborating directly with external entity IT teams, security reviewers, or platform governance stakeholders.

TECH STACK / TOOLS

.NET 8/9 - ASP.NET Core - Azure Functions - Durable Functions - EF Core - Semantic Kernel .NET - Azure APIM - API Center - Entra OBO - Logic Apps - webMethods - Cosmos DB - Postgres - Redis - gRPC

FIRST 90 DAYS SUCCESS

•    Steering and telemetry APIs are live, secured, and audited behind Entra and API Management.
•    Durable agent-loop hosting and integration plumbing are in place with idempotent, observable behaviour.
•    First governed MCP endpoints are live behind the gateway with least-privilege scopes and reusable connector patterns.
 
 
This role is not. A pure AI prompt or agent-reasoning role. This role builds the secure back-end and integration plumbing that agents and front-end experiences depend on.