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Fiverr Pro
English
$
USD
I will debug and optimize python backend fastapi django or flask queries


VKalek
About this gig
Your Python backend is broken and you don't have time to figure out why. Maybe a previous developer left you with a project that won't start, migrations that fail, or a 500 error you can't trace. I step in, read your code, find the actual root cause, and fix it no guessing, no rewrites you didn't ask for.
What I fix:
- Server won't start / crashes on boot
- Migration errors (Django ORM / Alembic)
- Broken serializers, views, routes (DRF, FastAPI, Flask)
- Dependency conflicts (requirements.txt, venv, Docker)
- Deployment failures (Gunicorn, Uvicorn, Docker, Render, Railway)
- Slow or hanging endpoints
How it works:
- Send me your repo (GitHub/GitLab/zip) and describe the error.
- I review it and confirm scope before you order (message me first for anything unusual).
- I fix it, test it runs, and send you a short report of what was wrong and what I changed.
I work with Django, DRF, FastAPI, Flask, PostgreSQL, MySQL, SQLite, Docker.
Get to know VKalek
VKalek
Backend Developer
- FromUkraine
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Ukrainian, Russian, English
I am a hands-on backend developer specializing in high-stress debugging, system stabilization, and connecting chaotic APIs into clean production code. I specialize in jumping into messy codebases to find root causes of errors and building robust payment infrastructure and data pipelines.
Other Software Development Services I Offer
FAQ
Can you fix a bug without seeing the code first?
No — message me with the error and I'll tell you honestly if it's a quick fix or bigger job before you order.
Do you sign NDAs?
Yes, happy to sign a simple NDA before reviewing sensitive code.
