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I will fix asp net core and rest API bugs
Mohamed Hossam
About this gig
Is an ASP.NET Core backend returning 500 errors, failing authentication, or behaving incorrectly under real requests?
I will diagnose and fix a clearly defined issue in an existing C#/.NET or REST API project. I can help with controller and service logic, Entity Framework Core, SQL Server, JWT authentication, API integration, validation, async code, and backend performance problems.
You receive:
- Root-cause diagnosis
- Clean, scoped code fix
- A short explanation of the change
- Basic verification or a focused test when practical
I have diagnosed production-style issues including EF Core N+1 queries, Cartesian explosions, thread-pool exhaustion, race conditions, and API bottlenecks under K6 load.
Please message me before ordering with the error, expected behavior, and relevant code. Packages cover existing projects and a defined issue; new features, redesigns, deployment, and unrelated bugs require separate scope.
Get to know Mohamed Hossam
Mohamed Hossam
Backend and Full Stack Software Engineer
- FromEgypt
- Member sinceMar 2025
- Avg. response time1 hour
Languages
English, Arabic
I am a backend and full-stack software engineer building production-oriented systems with ASP.NET Core, Django, Next.js, and React Native. I work across system design, REST and GraphQL APIs, SQL Server, PostgreSQL, Redis caching, concurrency control, WebSockets, background jobs, JWT security, and automated testing. I helped build a reservation platform serving 5,000+ weekly users, reduced race-condition failures by 82%, contributed to an architecture redesign that cut cost by about 56%, and used K6 at 1,000 concurrent users to uncover EF Core, SQL, and thread-pool bottlenecks.
Other Software Development Services I Offer
FAQ
Can you guarantee a fix before seeing the code?
I can confirm the scope after reviewing the issue details. The bug must be reproducible and fit the selected package; otherwise I will recommend a custom offer.
Do you work on Django or Next.js bugs too?
Yes, I can support Django or Next.js by custom offer. This Gig is focused on ASP.NET Core so buyers get a clear, specialized service.
Is deployment included?
No. Deployment, server configuration, and production access are separate services unless they are explicitly included in a custom offer.
Will you rewrite my application?
No. These packages cover defined issues in an existing project. Architecture redesigns and larger rewrites require a separate scope.
How do revisions work?
A revision covers an adjustment within the original requirement. New bugs, new features, or unrelated changes are quoted separately.
