I will fix bugs and add endpoints to your net core backend

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mostafaasamiir
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mostafaasamiir
Mostafa Samir

About this gig

Is your backend slow, buggy, or hard to extend?

Do you need an API built, fixed, or tested before launch?


I help startups and small teams get their backend working reliably with C# / ASP.NET Core and Python (FastAPI).


Problems I can solve for you:


You need a REST API built or extended

I build clean, documented endpoints in ASP.NET Core or FastAPI and connect them to PostgreSQL or MySQL, so your web or mobile app has a solid foundation.


Your existing code has bugs or is hard to change

I work inside existing .NET codebases, find the cause of the problem, and fix it without breaking the rest of your system.

Your users need secure login

I implement JWT authentication, refresh tokens, and registration/verification flows so accounts are protected properly.

Your database is slow or messy

I design tables, write SQL queries, and set up Entity Framework so your data stays organized and fast to retrieve.

You're not sure your API can handle real users

I test endpoints with Postman and run load, stress, and spike tests with JMeter, then report what breaks and where.

You have data but no clear picture of it

I build Power BI dashboards that turn raw numbers into reports your team can actu

Get to know Mostafa Samir

Mostafa Samir

Software Engineer Intern

  • FromEgypt
  • Member sinceOct 2026
  • Languages

    English, Arabic
I am a Software Engineering student at Cairo University with experience as a Backend Intern at Qorrect and a Software Testing Intern at El Sewedy Electrometer Group. I specialize in C#, ASP.NET Core, and Python, with hands-on experience in Docker, API testing, and performance metrics.