APIs that are easy to change
REST or GraphQL on Express, Fastify or NestJS, with request validation, consistent errors, versioning and OpenAPI docs generated from the code.
Node.js development company · UK
Node.js Development Company in the UK
Work with a UK-focused Node.js development company for stable APIs, reliable data flows, and production services your product can grow on. Techsleight Labs plans, designs, builds, QA-tests, launches, and supports production software with senior engineers, weekly demos, and clear delivery ownership.
- Strategy, build, QA and launch in one team
- Fixed-price projects after discovery
- Code and IP owned by you
Capabilities
Node.js capabilities we bring to your product.
Node.js is quick to start with and easy to get wrong at scale, so our screening covers the event loop, back-pressure and failure handling — not just routing.
Real-time features
WebSockets or Server-Sent Events for live updates and chat, with Redis pub/sub so messages still reach users connected to another instance.
Queues and background jobs
BullMQ or SQS for emails, exports and imports — jobs that are safe to retry, a home for the ones that keep failing, and a clear view of why.
Performance and memory
Finding the synchronous work blocking the event loop, the leak behind a nightly restart and the N+1 queries behind a slow endpoint.
Security by default
Input validation, rate limiting, secure headers, secrets kept out of the repo, dependency audits in CI and lockfiles that pin what ships.
Upgrades from old Node.js
Callback-era code moved to async/await, native modules rebuilt and services moved to a current LTS release, with tests written before risky changes.
What we build
What we build with Node.js.
Node.js is at its best where one system has to talk reliably to several others — which is where most of these projects sit.
Accounting integrations
Two-way sync with Xero, Sage or QuickBooks for invoices, payments and contacts, with every sync recorded so an entry can be traced back to its source.
Order and delivery workflows
Orders pushed to warehouses, labels booked with Royal Mail, DPD or Evri, and tracking events turned into customer updates.
Product APIs and webhooks
The API behind your web and mobile apps, plus outgoing webhooks with signing, retries and delivery logs your customers can check.
Live tracking and notifications
Driver locations, booking status and in-app notifications pushed over WebSockets, designed to survive restarts and run on more than one server.
Serverless functions
AWS Lambda or Vercel functions for webhooks, scheduled jobs and file processing, with cold starts and database connections handled properly.
Back ends for mobile apps
Auth, push notifications, file uploads and sync endpoints for iOS and Android, versioned so people on older app releases are not locked out.
Technology stack
Technology stack.
The tools that usually sit around Node.js in the projects we join. We fit into your stack — this is where we are most at home.
Runtime and frameworks
Node.js LTSExpressFastifyNestJS
Databases and caching
PostgreSQLMySQLRedisPrisma or Drizzle
Messaging and jobs
BullMQAmazon SQS and SNSSocket.IOScheduled jobs
Common integrations
StripeXero and QuickBooksHubSpot and SalesforceRoyal Mail, DPD and Evri
Testing and observability
Vitest or JestSupertestOpenTelemetryStructured logging
Deployment
DockerAWS Lambda and ECSKubernetesGitHub Actions
Pricing
Node.js development pricing.
Start with discovery, move to a fixed-price build, or run a dedicated team for a longer roadmap.
Node.js discovery sprint
From £2,000
Architecture, roadmap, cost planning, and project-risk validation
- A short strategy sprint covering technical scope, user flows, delivery plan, and budget range.
Managed Node.js development project
Fixed quote
MVPs, rebuilds, SaaS platforms, dashboards, portals, and business-critical launches
- Product planning, UX, engineering, QA, deployment, and post-launch support under one delivery owner.
Dedicated Node.js development team
From £9,500 per month
Longer roadmaps, multi-sprint delivery, and product teams that need extra senior capacity
- A stable engineering pod with weekly demos, sprint planning, code review, and transparent reporting.
Prices are in GBP. Every estimate is confirmed in writing after a discovery call — the figures above are where engagements start, not a quote.
How we deliver
How we deliver your Node.js project.
Seven stages, the same on every project. The length of each one changes with the work; skipping one never saves time for long.
- 01
Product and technical discovery
We map your Node.js product goals, users, integrations, compliance needs, timeline, and commercial priorities before planning the build.
Goals, users and constraints agreed
- 02
Architecture and delivery plan
You get a practical Node.js roadmap with milestones, team shape, risks, estimates, and the first release path.
Roadmap, team and estimate
- 03
Design, build, and QA
Our team ships the Node.js product in controlled sprints with code review, testing, demos, and visible progress every week.
Tested software every sprint
- 04
Launch and improvement
We handle deployment, analytics, monitoring, handover, and post-launch iterations so your Node.js platform keeps improving.
Live, monitored and documented
Why Techsleight
What working with us is actually like.
No inflated numbers — just how we run projects, and what you can hold us to.
Product engineering, not ticket-taking
We ask what the software is for before we estimate it — and we will tell you when something should not be built, or should be bought instead.
AI where it earns its place
LLM features, retrieval and automation built with evaluation, guardrails and cost controls, and plain software where that is the better answer.
Full-stack under one roof
Design, frontend, backend, mobile, cloud and QA in one team, so nothing falls between suppliers.
UK-focused delivery
UK business hours, estimates in pounds, and a contract with a UK company. Our engineers are based in the UK and India.
Flexible engagement
A fixed-scope project, dedicated developers or a monthly retainer — and you can move between them as the work changes.
You own everything
Code, IP, cloud accounts and documentation are yours from day one. We sign an NDA before discovery if you need one.
Support after launch
We stay on for fixes, upgrades and new features, or hand over cleanly to your in-house team with the documentation to match.
Relevant work
Node.js projects from our case studies.
Client work where Node.js was part of the stack. Each case study covers the brief, the approach and the result.
All case studiesFinance · Analytics
Modernize
Revenue analytics dashboard with multi-source data and automated reporting.
ReactNode.jsPostgreSQLD3.js
Read the case studySocial · Mobile
Pademi
Social discovery app for events, meet-ups and friend introductions.
React NativeNode.jsSocket.ioPostgreSQL
Read the case studyManufacturing · B2B
Teflon Bone
B2B catalogue, bulk ordering and export platform for a manufacturer.
Next.jsNode.jsStripePostgreSQL
Read the case studyFAQs
Questions we get asked.
Straight answers on scope, cost, timelines and how we work. If yours is not here, ask us directly.
What does a Node.js development company do?
A Node.js development company plans, designs, builds, tests, deploys, and supports Node.js software. At Techsleight Labs, that can include discovery, architecture, UI/UX, API integration, QA, cloud deployment, analytics, and post-launch roadmap support.
Do you work with companies in the United Kingdom?
Yes. This Node.js development company page is focused on United Kingdom businesses. We support UK collaboration with clear written updates, weekly demos, and planned handoff points so distributed teams can move quickly.
How much does Node.js development cost?
Node.js development pricing depends on scope, integrations, user roles, design depth, compliance needs, and launch timeline. Discovery sprints start from £2,000, dedicated teams start from £9,500/month, and managed projects are quoted after scope validation.
Can you build a complete Node.js product, not just provide developers?
Yes. You can use Techsleight Labs as a full Node.js development company for strategy, design, engineering, QA, deployment, and support. You can also start with a small discovery sprint before committing to the full build.
Can you improve an existing Node.js application?
Yes. We often join existing Node.js products to fix performance, improve architecture, add features, stabilise releases, modernise UI, or prepare the system for scale. We begin with a focused audit so the first sprint is practical.
Who owns the code and product IP?
You own the code, documentation, product IP, design assets, and infrastructure setup created for your project. We can sign an NDA before discovery and work inside your repositories, cloud accounts, and project tools.
How fast can a Node.js development project start?
Discovery can usually begin within a few working days of the first call, and most projects start within 5–7 working days of sign-off. Larger builds usually need a short planning sprint to confirm scope, architecture, milestones, risks, and the right team before full development begins.
Do you provide post-launch Node.js support?
Yes. After launch, we can continue with monitoring, bug fixes, performance improvements, security updates, roadmap features, analytics, and handover support. Many clients keep a monthly retainer after the main release.
Start a project
Planning a Node.js project?
Tell us what you are building with Node.js. We will reply within one working day with questions, a first view on approach and the next step.
What happens next
- 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
- 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
- 3A written proposal with scope, milestones, team and a GBP estimate you can take to your board.
Techsleight Labs is a trading name of Krapton IT Consultancy.
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