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I will build your backend API using node js express or nestjs
Xiongfei S
About this gig
Looking for a skilled backend developer to build robust, scalable APIs? You are in the right place!
I build high-performance backend systems using Node.js with Express and NestJS. I deliver clean, well-documented, production-ready code.
What I Offer:
RESTful API Development - Clean, well-structured APIs following best practices
Database Design - MongoDB, PostgreSQL, MySQL with optimized queries
Authentication - JWT, OAuth2, session-based auth with role-based access control
Real-time Features - WebSocket integration for live updates and notifications
Third-party Integrations - Payment gateways, email services, cloud storage
API Documentation - Swagger/OpenAPI docs for easy frontend integration
Testing - Unit tests, integration tests for reliable code
Deployment - Docker, CI/CD pipelines, cloud deployment on AWS, GCP, Azure
Why Choose Me:
Fast delivery with clear communication
Clean code following SOLID principles
Scalable architecture designed for growth
Post-delivery support included
Message me to discuss your project requirements!
Respect third-party rights
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Get to know Xiongfei S
Xiongfei S
Fullstack Backend Developer for Web Apps and APIs
- FromChina
- Member sinceMar 2026
Languages
Chinese, English
Experienced Full-Stack Developer with 5+ years building scalable web applications and backend services. I specialize in Node.js (NestJS, Express), Python (FastAPI, Django), React, and cloud deployment (AWS, Docker). I deliver clean, production-ready code with a focus on performance, reliability, and clear communication. Whether you need a REST API, real-time WebSocket service, database optimization, or a complete web application from scratch, I can help you build it right. I am fluent in both English and Chinese, making me an ideal partner for cross-cultural projects.
FAQ
What technologies do you work with?
I work with Node.js (Express, NestJS), Python (FastAPI, Django), databases (MongoDB, PostgreSQL, MySQL, Redis), and cloud platforms (AWS, GCP, Azure). I also use Docker, Git, and CI/CD tools.
Do you provide source code and documentation?
Yes! You will receive the complete source code, API documentation, database schema, and a README with setup instructions. Everything you need to maintain and extend the project.
