Build your backend with our senior Node.js team based in Krakow, Poland. We pair Node with React and Next.js frontends - the same stack behind Speeki's migration from Java and PHP to Node microservices, now serving 100+ enterprise clients.
Node.js is an open source, cross-platform runtime environment for developing server-side and networking applications. Node.js allows developers to build server-side applications with JavaScript and uses an event-driven, non-blocking I/O model that makes it lightweight and efficient. It's a very efficient JavaScript runtime environment, designed to execute JavaScript code on the backend. There are many Node.js uses, and it's commonly applied for building real-time, scalable network applications, and is widely adopted by companies such as Netflix, Uber, and PayPal. According to Enlyft's technology-adoption tracking, 232,168 companies now run Node.js in production, most commonly at companies with 10-50 employees.
The benefits of choosing Node.js for your next project
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We design and build APIs that match how your clients actually consume data - REST for straightforward resources, GraphQL when a project needs precise, flexible querying.
We build real-time chat, notifications, and live updates on WebSockets and Socket.io - the same approach behind Pomagator's real-time chat and location-based matching between requesters and volunteers.
We split growing systems into independently deployable services when a monolith stops being the right fit - the same approach behind Speeki's migration to a Node microservices backend.
We work with PostgreSQL, MongoDB, and Redis, choosing the right data store for the access patterns your product actually has, including ElasticSearch-backed search at the scale 8billionideas needed for 50+ schools and thousands of students.
We implement session and token-based auth, role-based access control, and third-party auth providers, matched to how your product actually needs to restrict data.
We cover services and controllers with Jest and Mocha, isolating business logic from infrastructure so tests stay fast and reliable as the codebase grows.
We profile and tune Node applications under real load, including transactional systems like Eatzon's group ordering and split-payment flows, built out across multiple delivery phases.
We maintain and extend production Node systems, and migrate legacy backends (Java, PHP, Ruby) to Node incrementally rather than requiring a big-bang rewrite.
Node.js is the backend half of our core stack, paired with React and Next.js on the frontend - the same combination behind Speeki's migration from Java and PHP to Node microservices, now serving 100+ enterprise clients under continuous ISO audit.
A partnership that's grown for 5+ years
We build long-term relationships, not one-off projects - our partnership with Speeki has run 5+ years, from a single feature to a full platform serving 100+ enterprise clients.
One team, API to UI
Our Node expertise spans the full chain - from API and database design on the backend to React and Next.js frontends. No handoffs, no gaps, no integration surprises.
Experience across industries
Our engineers have shipped Node in real-time apps, e-commerce, enterprise compliance platforms, and EU-funded products across industries. That range shows up in every architecture decision.
Tested, typed, reviewed
Type-safe code where it matters, automated tests, and code reviews are part of how we ship - not features we add later when something breaks.
The mix depends on what your backend actually needs. Most Node engagements include a backend engineer designing the API and data layer, a QA engineer covering both unit and integration tests, and a project manager keeping delivery on track - with a frontend engineer added when a React or Next.js client is part of the scope.
We run in Agile sprints with regular reviews and clear ownership, so the backend keeps evolving without disrupting what's already live.
Get started with Node.js - build your backend with a team that knows the full stack
Ready to build a new API, or scale a backend that's outgrown its current architecture? Whether that means adding real-time features, splitting a monolith into services, or migrating from a legacy stack the way we did for Speeki, we'll help you design a Node backend that's built to last. Let's talk about your backend.
Node.js is an open-source, cross-platform JavaScript runtime that allows developers to build server-side applications using JavaScript. Its event-driven, non-blocking I/O model means it can handle a large number of simultaneous connections efficiently - making it lightweight and fast for applications that involve significant data transfer or real-time interaction.
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