I will optimize your slow entity framework core and sql queries

T
tolgahanotun
T
tolgahanotun
Tolgahan

About this gig

Is your .NET application slow? Do pages take seconds to load, or does your database CPU spike under load?

I'm a backend .NET developer specializing in Entity Framework Core and SQL performance. I find *why* your queries are slow and fix them without breaking your existing logic.


*What I can do for you:*

- Diagnose slow EF Core queries (N+1 problems, over-fetching, bad tracking, cartesian explosions)

- Rewrite LINQ and raw SQL for speed

- Add and tune database indexes

- Fix slow list/grid pages and large data-table loads

- Explain what was wrong and how I fixed it, in plain language

*Works with:* ASP.NET Core, EF Core, SQL Server, PostgreSQL, Dynamic LINQ

Send me your slow query, endpoint, or a description of the problem and I'll tell you exactly what can be improved before you order.


*FAQ:*

- *Do you need access to my database?* I can work from your query + schema, or a sample/anonymized database. No production credentials required.

- *Can you guarantee it will be faster?* I guarantee a diagnosis and concrete improvements. Real-world gains depend on your data and setup; I'm honest about what's achievable before you order.

- *Which databases?* SQL Server and PostgreSQL.


Get to know Tolgahan

Tolgahan

Senior Software Developer

  • FromTurkey
  • Member sinceSep 2026
  • Avg. response time1 hour
  • Languages

    Turkish, English
Backend .NET developer with 10 years of experience on real production systems. I build reliable backends and make slow ones fast. My strongest areas: optimizing slow EF Core and SQL queries, migrating SQL Server databases to PostgreSQL, and building clean REST APIs (Clean Architecture, CQRS, MediatR). Stack: ASP.NET Core, EF Core, SQL Server, PostgreSQL. I work inside existing codebases without breaking what works, and explain what I did in plain language. Tell me your problem before you order and I'll tell you honestly if I can help.