Job Description

This is a remote position. Job Description: Senior C# Developer (Java to C# Migration) Role Senior C# Developer with deep Java background Focus Migrating Java microservices to C# / .NET, using AI-assisted code conversion plus hands-on rework Level Senior (8+ years) Openings TBD, initial ask is for one or more senior developers Location US preferred; India considered (fill in per staffing plan) Engagement type Contract / staff augmentation, duration tied to conversion effort Client Confidential. Do not disclose client name or architecture to candidates before submission About the engagement The client runs a set of Java microservices and wants to convert them to C# following their in-house C# patterns and conventions. The plan is to run the Java code through an AI-assisted conversion pipeline to get a first pass (they expect roughly 50 percent, not a finished product), then have senior developers review, correct, and complete the conversion so the C# services are production ready. The client will supply the target C# patterns, so the developer needs to read both languages fluently and translate idioms, not just syntax. What you will do • Convert Java microservices to C# / .NET, using AI-generated first drafts as a starting point and finishing them by hand to the client's coding patterns. • Review AI-converted output for correctness, missed edge cases, hallucinated APIs, and behavior drift between the Java original and the C# result. • Map Java constructs and libraries to their .NET equivalents (Spring to ASP.NET Core, Maven/Gradle to NuGet, JPA/Hibernate to Entity Framework, etc.). • Preserve service contracts: REST endpoints, message formats, error handling, logging, and config behave the same after conversion. • Write or port unit and integration tests to prove functional parity before and after migration. • Help shape the conversion approach: prompt templates, pattern libraries, and review checklists so the process scales across many services without one-off effort. • Work directly with client engineers, explain trade-offs plainly, and flag where a straight conversion is the wrong call. Must have • Deep Java: 8+ years building production Java microservices (Spring Boot or similar). Can read unfamiliar Java code and explain what it does and why. • Strong C# / .NET: 5+ years hands-on with C# and .NET Core / .NET 6+, ASP.NET Core Web APIs, dependency injection, async patterns. • Real migration experience: Has personally converted or re-platformed code between languages or frameworks, not just maintained the result. • Microservices and REST: API design, service-to-service communication, containerization (Docker), CI/CD. • Testing discipline: Comfortable proving parity with automated tests, not visual inspection. • Communication: Works independently, translates technical detail for business stakeholders, gives direct feedback. Nice to have • Experience using AI coding tools (GitHub Copilot, Claude, ChatGPT, or similar) for code conversion or large refactors, and an honest view of where they fail. • Familiarity with LLM-assisted development workflows: prompt design, output validation, agentic coding tools. • Kubernetes, AWS or Azure, API gateways (Kong). • Exposure to MySQL and SQL Server. • Exposure to Python (helpful for tooling around the conversion pipeline).