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I will build a fastapi and backend with authentication
henry zhao
About this gig
I will develop a clean, scalable, and well-structured backend API using FastAPI or Spring Boot.
With a strong background in backend development, I focus on building reliable RESTful APIs, authentication systems, and database-driven applications. My goal is not just to deliver working code, but to provide maintainable, readable, and production-ready solutions.
What I can help you with:
RESTful API development
Authentication (JWT / login systems)
CRUD operations
Database integration (MySQL / PostgreSQL)
API validation & error handling
Clean architecture & modular design
AI / LLM API integrations
I pay close attention to:
Code quality
Performance
Clear structure
Proper HTTP responses
Security best practices
Whether you need a small API, feature extension, or backend component, I can deliver a solution tailored to your needs.
If you're unsure about technical details, feel free to message me before ordering
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 information do you need to start?
Project requirements, preferred tech stack (FastAPI or Spring Boot), and database details if applicable.
Do you provide database integration?
Yes. I support MySQL and PostgreSQL integration, including schema design and CRUD operations.
Will the code be clean and well-structured?
Absolutely. I focus on modular design, readability, and maintainable architecture.
Do you support authentication / JWT?
Yes. I can implement secure login systems using JWT-based authentication.
Can you integrate AI / LLM APIs?
Yes. I can integrate AI services such as OpenAI into backend workflows when needed.
