Node.js development for fast APIs and real-time services
Node.js runs JavaScript on the server using an event-driven, non-blocking model. It is well suited to APIs, real-time features such as chat and notifications, and integration services that spend most of their time waiting on other systems.
Node.js lets a team use one language, ideally TypeScript, across frontend and backend, and share types and validation between them. Its package ecosystem is vast and it handles many simultaneous connections efficiently. It is less suited to CPU-heavy work such as large calculations or image processing, which can block the event loop; for that we would use worker processes, Go or Python. On its own it is unopinionated, so for larger backends we often add NestJS for structure.
What we build with Node.js
- REST and GraphQL APIs
- Real-time chat, notifications and live updates
- Integration and webhook services
- Serverless functions
- Backends for React and React Native apps
Node.js questions
Is Node.js fast enough for production?
Yes, for I/O-heavy work such as APIs and real-time services it performs very well. CPU-intensive tasks are better moved to background workers or another language.
Should we use Express or a framework like NestJS?
Express or similar minimal frameworks suit small services. For larger applications with many modules and developers, NestJS provides structure that keeps the code maintainable.
What is Node.js best used for?
Node.js excels at APIs, real-time features such as chat and live dashboards, integrations and services that handle many concurrent connections. It is less suited to heavy CPU-bound computation.
Why use the same language on frontend and backend?
With JavaScript or TypeScript on both sides, teams can share types, validation logic and developers across the stack. This reduces friction and keeps API contracts consistent.
How does Node.js handle real-time features?
Node.js handles many open connections efficiently, making it a natural fit for WebSockets and server-sent events. We use it for live notifications, chat, collaborative editing and streaming updates.
How do you handle CPU-heavy work in Node.js?
We move heavy processing out of the request path into worker threads, background job queues or separate services, so the main event loop stays responsive for users.
How do you keep Node.js dependencies secure?
We keep dependencies to a sensible minimum, lock versions, run automated vulnerability scans and update packages regularly. Unmaintained packages are replaced before they become a problem.
Where can Node.js services be hosted?
Node.js runs on virtually every cloud provider, on containers, serverless functions and traditional servers. We deploy into your own cloud account with monitoring and logging in place.
How do you test Node.js applications?
We write unit tests for business logic and integration tests that exercise real API endpoints and databases. Tests run automatically on every change to your repository.
Is Node.js a good choice for microservices?
Yes. Node.js services start quickly and use modest resources, which suits small, independently deployed services. We only recommend microservices when team size or scaling needs justify the extra complexity.
More backend technologies
Have a project in mind? Let’s talk.
Tell us what you are building. We reply within one business day with next steps — and we are happy to sign an NDA first.