I will optimize asp net core apis sql queries and backend performance

Is your backend slow, failing, or behaving unpredictably under load? I diagnose and fix ASP.NET Core or Django APIs, databases, and application bottlenecks using practical profiling, SQL analysis, Redis caching, and targeted code changes.

I can investigate slow endpoints, REST API bugs, EF Core or ORM query issues, N+1 problems, database bottlenecks, cache strategy, thread-pool pressure, race conditions, exceptions, and scalability constraints. My Fiverr profile documents hands-on K6 testing at 1,000 concurrent users and production systems serving 5,000+ weekly users.

You receive a clear diagnosis, scoped fixes, and practical recommendations aligned with your package.

Please contact me before ordering if your project has custom or complex requirements.