I will fix bugs in your python fastapi or flask backend API

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hmahmudul852
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hmahmudul852
Mahmudul Hasan

About this gig

Hi, I'm a Backend Engineer with 6+ years of experience in Python development.

I specialize in fixing bugs and issues in FastAPI and Flask applications quickly and efficiently.

If your backend is not working as expected, I can help you identify and fix the problem.


What I can fix:

  • FastAPI or Flask API errors
  • Backend bugs and unexpected behavior
  • Authentication issues (JWT, login/signup)
  • Database issues (PostgreSQL, MySQL, SQL queries)
  • Performance problems and slow APIs
  • Integration issues with frontend or third-party APIs


What you will get:

  • Clean and working code
  • Optimized and reliable backend
  • Clear communication and quick response
  • Suggestions for improvement (if needed)


I have real-world experience building scalable backend systems, so I understand how to fix issues properly, not just quick patches.


Please contact me before placing an order so I can understand your issue.

Get to know Mahmudul Hasan

Mahmudul Hasan

Backend Engineer, Python FastAPI, Flask, PostgreSQL, API Expert

  • FromBangladesh
  • Member sinceAug 2020
  • Languages

    Bengali, English, Japanese, Hindi
Hi, I’m a Backend Engineer with 6+ years of experience in Python. I specialize in FastAPI and Flask, building REST APIs, fixing backend bugs, and optimizing performance. Skilled in JWT authentication, PostgreSQL, and MySQL. I focus on clean, reliable, and scalable solutions. Let’s solve your backend issues quickly and efficiently.