Node.js development services · EonTech

Node.js backends built to
stay responsive.

Senior engineers shipping TypeScript-first APIs, real-time features, and event-driven services. We pick Node where it shines and tell you when it does not. Tested, observable, and yours to own.

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  • TypeScript end to end
  • Senior teams · your time zone
  • GDPR · ISO 27001
TypeScript-first
Typed services and shared contracts, not loose JavaScript
Senior only
The engineers who scope your work are the ones who write it
Your IP
You keep the code, the pipelines, and the infrastructure

When Node.js is the right choice

The honest case for Node.js

Node is a precision tool, not a default. It is excellent for I/O-bound, connection-heavy, real-time work — and a poor fit for heavy computation. We choose it where the trade-offs land in your favour.

  • I/O-heavy APIs

    Node's event loop earns its keep when a service spends its time waiting on databases, queues, and third-party calls. We build REST and GraphQL gateways that stay responsive under fan-out.

  • Real-time features

    WebSockets, server-sent events, and presence systems for chat, dashboards, and collaboration. Node keeps thousands of open connections cheap to hold.

  • BFF and edge layers

    A backend-for-frontend that shapes data for your web and mobile clients, plus edge functions where latency matters. One language across the stack speeds delivery.

  • Where it is the wrong tool

    We will say so. CPU-bound work — heavy transforms, large-scale numerics, ML training — belongs in Python, Go, or a worker tier. We design the split rather than force everything through one runtime.

Engineering practice

Production discipline, from the first commit

  • Testing

    Unit, integration, and contract tests run on every merge. We test the boundaries — HTTP, queues, and the database — not just pure functions.

  • CI/CD

    Reproducible pipelines that lint, type-check, test, and ship. Releases are boring by design, with fast rollback when they are not.

  • Observability

    Structured logs, metrics, and distributed traces wired in from day one through OpenTelemetry. You see latency and errors before users report them.

  • Security

    Dependency auditing, secret management, input validation, and least-privilege access. Supply-chain risk is treated as a first-class concern.

  • Performance

    Profiling under realistic load, connection pooling, caching, and back-pressure. We tune the event loop instead of guessing.

  • Type safety

    TypeScript end to end with shared schemas, so a contract change surfaces at compile time rather than in production.

Fits your stack

Built to live inside your systems

Almost no Node service runs alone. We design the seams — to your databases, message buses, and the systems you already operate — so a new service strengthens the estate instead of fragmenting it.

When intelligence belongs in the flow, our Node services call into Python ML backends and model APIs, keeping each tier in the language it is best at.

See our API development practice

How we deliver

From contract to a live service

We prove the architecture on a thin slice before scaling the surface, so the foundations are right before features pile on.

  1. 01

    Scope the contract

    We agree the API surface, the data model, and the non-functional targets — latency, throughput, uptime — before code. The interface is the design.

  2. 02

    Build a thin slice

    One real path end to end: request, persistence, tests, pipeline, and observability. It proves the architecture before features stack on top.

  3. 03

    Scale the surface

    Senior engineers ship in weekly demos. Each new endpoint or worker arrives tested, traced, and reviewed on merge.

  4. 04

    Harden and hand over

    Load testing, security review, and runbooks. You receive a service you can run and a team that documented how.

Why EonTech

A team that ships and stays accountable

  • One partner

    Backend, frontend, and custom AI under a single accountable team and contract.

  • Your time zone

    A globally distributed team that overlaps your working day and meets EU data rules.

  • Built to extend

    Modular services with clear contracts, so the next feature is an addition, not a rewrite.

  • You own it

    Code, infrastructure, and CI are yours to run, audit, and grow.

Common questions

What engineering leads ask first

  • JavaScript or TypeScript?

    TypeScript, by default. Static types catch contract drift at build time, document intent, and make refactoring safe at scale. We work in plain JavaScript only when an existing codebase requires it.

  • Can you join an existing Node.js codebase?

    Yes. Much of our Node work is staff augmentation or a dedicated team embedding into your repos, your review process, and your release cadence. We add senior capacity without a rebuild.

  • How do you handle long-running or CPU-heavy jobs?

    We move them off the request path into worker queues, and where the work is genuinely compute-bound we run it in a language better suited to it. The architecture isolates that load so the API stays responsive.

Build your Node.js backend right

Tell us the service you need and the systems it must live inside. We will scope a fixed first milestone in days, then start shipping tested, observable code you own.

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