Hire senior C# engineers in your time zone.

A senior C# engineer typically owns a service or a slice of an application end to end: the API surface, the data access layer, and the tests that keep it from regressing. In enterprise environments, that often includes navigating dependency injection, layered architecture, and integration with other internal systems that were not built recently.

They also own decisions around async and concurrency. C#'s async/await model is easy to misuse, and a senior engineer knows how to avoid deadlocks, unnecessary thread blocking, and the subtle bugs that come from mixing sync and async code incorrectly. On the data side, they decide when Entity Framework's abstractions are sufficient and when a query needs to be written by hand for performance.

In game development, the ownership looks different but the seniority signal is similar: someone who understands how C# garbage collection and object allocation affect frame rate, and who structures gameplay code so designers and other engineers can build on top of it without breaking things.

Most professional C# work happens on modern .NET with ASP.NET Core for web APIs, though plenty of enterprise codebases still run on the older .NET Framework and need engineers who can work in both. Entity Framework Core is the default ORM, though experienced engineers know when Dapper or raw SQL is the better call for performance-sensitive paths.

Outside of web backends, Unity is the dominant reason companies hire specifically for C# rather than for .NET broadly, and it comes with its own conventions around component-based architecture, coroutines, and performance profiling that do not overlap much with backend work.

On the cloud side, Azure is the natural fit given Microsoft's tooling, but plenty of teams run C# services on AWS just as easily, especially once everything is containerized with Docker. Testing tends to run through xUnit or NUnit, and most professional teams pair that with CI pipelines in Azure DevOps or GitHub Actions.

Start with a real example of a service or application the candidate owned, and ask them to walk through the architecture: how layers are separated, how dependencies are injected, and how they tested it. Vague answers about following a tutorial or a boilerplate template are a clear signal to dig deeper.

For backend roles, ask about a specific performance problem they solved, ideally involving Entity Framework or database access, since that is where a lot of real-world C# work goes wrong. For Unity roles, ask about a specific optimization they made related to garbage collection or frame rate, since that distinguishes engineers who understand the runtime from those who only know the API surface.

BetterEngineer already runs this kind of evaluation, including architecture walkthroughs and performance-specific questions matched to whether the role is backend or game development, before a candidate is ever presented to you.

Quick evaluation checklist:

• Ask for production examples of services or applications they have owned end to end
• Review how they structure a solution: layering, dependency injection, and testing
• Check experience with Entity Framework or Dapper on a realistic data model
• Probe async and concurrency: when they use async/await correctly versus incorrectly
• For game roles, review Unity project structure and how they manage performance