I will optimize your slow dotnet API and ef core sql queries

Is your .NET / ASP.NET Core API slow endpoints taking seconds, EF Core queries hammering SQL Server? I fix that, and prove it with before/after benchmarks.

I'm a senior .NET engineer with 11+ years building and optimizing production APIs. I recently took a search endpoint from multi-second to sub-300ms by pushing filters into the database and cutting projection over-fetch. I bring that same discipline to your code.

What I do:

Profile your slow endpoints and queries to find the real bottleneck

Fix N+1 queries, over-fetching, missing AsNoTracking, and bad LINQ translations

Push filtering and paging into SQL / Cosmos instead of memory

Tune EF Core, add the right indexes, and fix async misuse

Deliver clear before/after benchmarks so you see the gain

Stack: C#, ASP.NET Core, EF Core, SQL Server, Azure, Cosmos DB, Dapper.

Every change comes with measurements no hand-waving. Send me your slow endpoint or repo and I'll tell you honestly what's fixable and how much faster it can get.