Node.js
Developer

A freelance Node.js developer is an independent professional who specializes in backend development in JavaScript/TypeScript, designing and building APIs and server-side services without going through an agency. You talk directly to the person writing the code — no technical project manager rephrasing your requirements between you and the actual developer. For a backend, where architectural choices (API structure, error handling, authentication strategy) determine the security and maintainability of the service, that direct line avoids information getting lost along the way.

Node.js makes sense when the front end is already in JavaScript/React and you want a single language from front to back, when the application needs real-time features (WebSockets, live notifications), or when concurrent request volume is high with mostly I/O-bound operations (APIs, external calls). PHP remains a solid choice for a WordPress site or an integration with an existing PHP system. Python tends to make more sense for computation or data science needs. This choice is made during scoping, based on the ecosystem already in place and the project's real constraints — not on an imposed technology preference.

A REST API with a handful of CRUD resources and simple authentication generally takes 1 to 3 weeks. A more complete backend with multiple roles, third-party integrations (payment, email) and webhooks takes 3 to 6 weeks. A full SaaS application backend (multi-tenant, billing, fine-grained permissions) takes several weeks to a few months depending on functional complexity. An exact timeline is only estimated after scoping the requirements — endpoints, integrations, and security constraints significantly change the effort involved.

The systematic basics: strict input validation (never blindly trusting incoming data), JWT or OAuth 2.0 authentication depending on context, password hashing, rate limiting on sensitive endpoints, secrets kept out of the source code (environment variables, never committed), and error logging to detect abuse attempts. The security level is then adjusted to the sensitivity of the data being handled — a backend processing payments or personal data gets extra attention.

Yes. The handover starts with an audit of the code, the dependencies (often outdated or with known vulnerabilities on an older project), and the endpoint architecture. The goal is to identify what can be kept and what needs to be rethought, without rewriting what already works correctly. For a codebase that's critical in production, changes are introduced gradually with tests on the sensitive paths, rather than in one risky deployment.

Yes. Deployment includes going live on a VPS or cloud, setting up CI/CD where relevant, and configuring logs and error alerts to monitor the service once it's live. On the maintenance side, two options: a one-off intervention for a bug or new feature, or more regular follow-up if the API evolves frequently. The technical and OpenAPI documentation delivered with the project limits how much you need to rely on me for basic changes.