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English
$
USD
I will fix python or fastapi bugs, API errors, and backend issues
henry zhao
About this gig
If you are facing issues with your Python or FastAPI backend, I can help you quickly identify and fix the problem.
I specialize in backend development and API debugging. Many errors in Python or FastAPI applications are caused by small mistakes in logic, routing, database queries, or API integration. I will investigate the issue and provide a clean fix.
I can help with:
Python backend bugs
FastAPI API errors
Backend logic problems
Routing or dependency issues
Database related errors
API integration issues
Technologies I work with:
Python
FastAPI
REST APIs
JWT authentication
MySQL / PostgreSQL
Please send me a message before placing an order so we can discuss the issue and find the best solution for your project.
Get to know henry zhao
henry zhao
Backend Developer, FastAPI Flask and Spring Boot, AI Integration
- FromChina
- Member sinceFeb 2026
- Avg. response time1 hour
Languages
Chinese, English
I’m a backend-focused developer specializing in REST API development, authentication systems, and AI integrations.
I work with Python (FastAPI / Flask) and Java (Spring Boot), building clean, modular, and reliable backend services.
Experienced in JWT authentication, MySQL/PostgreSQL database design, structured JSON responses, and OpenAI / LLM API integration.
I focus on writing maintainable code, clear API architecture, and predictable system behavior.
Other Software Development Services I Offer
FAQ
What kind of Python or FastAPI issues can you fix?
I can help fix various backend issues such as Python bugs, FastAPI API errors, routing problems, database errors, and backend logic issues. If you are unsure whether your issue fits this gig, feel free to send me a message first.
Should I contact you before placing an order?
Yes, it is recommended to send me a message first. This helps me understand the issue and confirm that the problem fits this gig before you place an order.
What information should I provide about the bug?
Please provide a clear description of the issue, any error messages, screenshots if available, and relevant parts of the code or project setup. This will help me identify and fix the problem faster.
