I develop backend services and APIs for web applications, mobile products, Telegram bots, and internal business tools. I can build a new backend from scratch or extend an existing system with additional endpoints and integrations.
Before development begins, I review the required data flow, user roles, external services, and the way the frontend or other clients will use the API. We agree on the endpoints, data model, authentication requirements, and common error cases before the implementation starts.
The backend can be built with Python and FastAPI or with Node.js and TypeScript. Depending on the project, I can add PostgreSQL, authentication, input validation, file handling, background jobs, webhooks, payment services, CRM or email integrations, logging, automated tests, and Docker deployment.
You will receive the source code, database migrations, setup instructions, and API documentation for the agreed scope. Hosting, paid third-party services, and work outside that scope are discussed separately before they are added.
