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


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
Software Engineer Intern
- FromEgypt
- Member sinceOct 2026
Languages
English, Arabic
