Backend API development for web applications and SaaS systems using Node.js, Python, and modern backend architecture.
I build scalable backend systems, REST/GraphQL APIs, authentication systems, and production-ready server-side applications.
Services / Features
- REST & GraphQL API development
- Node.js (Express, NestJS) backend development
- Python (FastAPI) backend development
- JWT / OAuth2 authentication & role-based access control
- PostgreSQL / MongoDB database design
- Redis caching & performance optimization
- API integration & third-party services
- Background jobs & queue systems
- Swagger / OpenAPI documentation
- Dockerized deployment setup
- Clean architecture & modular code structure
Tech Stack
Node.js, Express, NestJS, Python, FastAPI, PostgreSQL, MongoDB, Redis, REST API, GraphQL, Docker, JWT, OAuth2
Deliverables
- Backend API source code
- Database schema & migrations
- API documentation (Swagger/OpenAPI)
- Docker setup
- Structured backend architecture
- Basic testing setup