API Developer

Designs, migrates and supports the RESTful APIs that serve fmPilot Integrations, Vendor, Client and Mobile platforms. Leads the move from legacy .NET Framework APIs to .NET 4.8.1 and Azure Functions. Key Responsibilities ‒ Design, develop and maintain RESTful APIs for vendor, client and mobile platforms. ‒ Migrate legacy .NET Framework APIs to ASP.NET Core and Azure Functions; publish and version them through APIM. ‒ Build and support integrations that update SQL Server-based systems and related business data. ‒ Implement authentication and authorization for secure API access, including OAuth 2.0 and JWT validation. ‒ Ensure high-quality API design with strong error handling, validation, logging and monitoring. ‒ Lead code reviews, mentor engineers and enforce engineering standards. ‒ Troubleshoot production issues and improve performance, reliability and scalability.

Required Skills And Experience

‒ Strong experience in C# and modern .NET development, plus .NET Framework-based enterprise applications. ‒ Hands-on ASP.NET Web API and ASP.NET Core REST API development. ‒ Strong knowledge of Entity Framework and SQL Server; able to write and optimize T-SQL and stored procedures. ‒ API security principles: OAuth 2.0, JWT, SAML and role-based access. ‒ API versioning, exception handling, logging and monitoring. ‒ Experience integrating APIs with web, mobile and third-party systems. ‒ Familiarity with Swagger/OpenAI, CI/CD pipelines and DevOps practices. ‒ Ability to work in legacy codebases and support long-running enterprise platforms.