Hire dedicated Node.js developers who build for production, not just for demo environments. Our UK-based backend specialists work with Express.js, NestJS, and Fastify, backed by senior oversight and eCommerce domain expertise that most Node.js agencies do not have on the same team.
A Node.js backend that works in demos does not automatically hold up in production. Our senior developers build with proper error handling, connection pooling, and caching strategies in from the start not retrofitted when something breaks under real traffic.
Get In TouchEvery Node.js build is reviewed by a senior. Event loop behaviour, async error handling, and connection management are resolved at design stage, not after launch.
For large backends and microservices needing structure and TypeScript discipline. NestJS is right when a project will be maintained by a team for multiple years.
All our Node.js developers are UK-based. Production issues, code reviews, and questions are resolved within your working day no overnight gap between your message and a reply.
Building a Node.js API layer for a headless commerce platform is different from building a generic REST API. Our background in Shopify and Magento means our Node.js developers understand what eCommerce data structures and order flows actually require.
Most Node.js agencies build applications that work. Fewer build applications that stay performant under real traffic, remain maintainable as the team changes, and avoid the production issues that appear when event loop blocking, unhandled rejections, and connection pool exhaustion go unchecked at the architecture stage.
Our senior Node.js developers address those things before a line of code is written. For enterprise backends and microservices, we use NestJS; its TypeScript-first, modular structure makes large codebases significantly easier to maintain over time than the equivalent Express application that has grown without discipline. For REST APIs and lighter backends, Express or Fastify is the right call, and we make that choice based on the project's needs.
We also bring eCommerce domain knowledge to Node.js projects. Our background in Shopify, Magento, and headless commerce means our developers understand product catalogue structures, order state management, and payment gateway integration patterns knowledge that shapes better architecture decisions than a backend team encountering eCommerce for the first time.
Discuss Your Project2+ Experience Years
Builds Node.js features to clear specifications under senior oversight. Understands Express.js routing, REST principles, and basic database interactions. Suited for well-defined additions to an established codebase where architecture is already in place and scope is clearly bounded.
5+ Experience Years
Designs and builds complete API endpoints and service layers independently. Proficient in Express.js or NestJS, TypeScript, JWT and OAuth authentication, query optimisation, and Redis. Writes tests for code produced. Works independently on mid-complexity Node.js APIs and integrations.
5+ Experience Years
Architects Node.js backends for production scale. Deep in event loop behaviour, async error patterns, NestJS module architecture, database performance, Redis, message queues, and Docker. Makes the architecture decisions that determine whether a Node.js backend holds up long-term.
3+ Experience Years
Specialist in REST and GraphQL APIs on Node.js. Handles API versioning, rate limiting, JWT authentication, Swagger documentation, and performance optimisation for high-traffic endpoints. Right when the API is the primary deliverable serving a mobile app, web frontend, or third-party integrations.
5+ Experience Years
For enterprise backends where architecture complexity needs specialist input. Designs NestJS module structures, defines microservice boundaries, implements CQRS where appropriate, and makes the governance decisions that prevent large Node.js codebases from degrading as they grow.
7+ Mixed levels
For larger Node.js projects needing a coordinated team. We cover API development, database work, real-time features, DevOps, and technical leadership. For agencies, the team operates fully under your brand, client calls, deliverables, and code with no reference to KiwiCommerce.
REST APIs using Express.js, NestJS, or Fastify resource routing, input validation, JWT and OAuth authentication, rate limiting, and Swagger documentation. Built to handle real traffic, not just pass a basic functional test in a staging environment.
Modular, TypeScript-based microservices using NestJS. Designed for independent deployment, service boundary clarity, and long-term maintainability. The right architecture for enterprise backends that need to scale without the codebase becoming unmanageable.
WebSocket and Socket.IO backends for live order tracking, chat systems, collaborative tools, auction platforms, and any application requiring real-time data pushed to connected clients. Tested for stability under sustained concurrent user loads, not just in development.
Node.js API layers connecting React or Next.js storefronts to Shopify, Magento, or custom commerce backends. Built with product catalogue data structures, order state management, and payment gateway reliability in mind not assembled generically.
Upgrades from Node.js 18 (EOL April 2025) or earlier to Node.js 22 or 24 LTS. Includes dependency compatibility audit, breaking change resolution, and test coverage validation before the upgraded version reaches your production environment.
A dedicated Node.js developer assigned to your application on a monthly retainer. Builds codebase knowledge over time, delivers new features faster as the engagement progresses, and is available within your working hours not shared across a client pool.
UK-based, senior-reviewed, production-ready. Those are not three separate selling points. They are the same standard applied to every Node.js backend we deliver project work, retainer, or white-label.
A Node.js application that looks fine in staging can fail under production traffic when event loop blocking, unhandled promise rejections, and connection pool limits go unmanaged. Our developers address these at the architecture stage not as emergency fixes after a live incident.
Every project has senior developer involvement from the start. Architecture decisions, framework selection, database design, and code review all sit under that oversight. Junior and mid-level developers work within a defined structure not independently on problems that need senior judgement
Production incidents do not wait for convenient time zones. Our Node.js developers are UK-based and available during your working day. When an API fails at 9am or a deployment breaks mid-afternoon, someone is there not picking up your message the following morning.
Connecting a Node.js API to Shopify or Magento is not the same as building a generic REST API. Product catalogues, order state machines, inventory sync, and payment reliability have specific requirements. Our eCommerce background means our Node.js developers already understand them.
NestJS is the right framework for large Node.js backends. Its TypeScript module system and dependency injection make complex codebases easier to maintain. Most agencies default to Express regardless. We recommend NestJS when the project scale warrants it and deliver it properly
We work as the Node.js team behind a number of UK agencies. The team operates under your brand client calls, deliverables, and code with no reference to KiwiCommerce. Your clients see your standard. We write the backend.
KIWI Commerce redeveloped my entire website, exactly to my requirements. They worked exactly along with my timeframe and were fantastic to work with. I would highly recommend this company. Thank you Sam and the team!
Great response to tickets. We feel our website is in safe hands with Kiwi. Any issues are fixed very quickly. Great value for money. We have been working with Kiwi for a couple of years now and find them very helpful and easy to get along with. Would highly recommend.
Working with Kiwi Commerce has been a very smooth experience. Their team is responsive, knowledgeable, and always willing to go the extra mile. From development to ongoing support, everything is handled efficiently and with great attention to detail. Highly recommended.
We’ve been working with Kiwi Commerce for ongoing website improvements and support, and the experience has been consistently positive. They are proactive, easy to work with, and quick to respond whenever we need assistance. Great team and great service.
Your questions answered.
Cannot find what you are looking for? Contact our team.
Node.js suits REST APIs, real-time applications, microservices, and headless eCommerce API layers. Its non-blocking model handles concurrent I/O well. For CPU-intensive work, Python or Go are better choices. We will give you an honest recommendation before you commit to a direction.
Express.js is minimal ight for APIs where full control matters. NestJS is TypeScript-first and modular best for large backends and microservices. Smaller APIs: Express is usually correct. Enterprise backends with growing teams: NestJS is the better long-term choice.
Yes. Our seniors have 5+ years of production experience event loop optimisation, NestJS microservices, database performance, Redis, Docker. For architecture-stage projects, they assess requirements before code starts and define a structure that scales correctly.
Remote as standard but UK-based. All our Node.js developers work remotely and are based in the UK. Same timezone as your team, same working hours, and available for calls, production issues, and code reviews without an overnight gap between your message and a response.
Yes, and our eCommerce background is a genuine advantage. Building a Node.js API for headless commerce needs more than REST API skills it needs knowledge of product catalogue structures, order state machines, and payment gateway patterns. Our developers bring both.
Node.js 24 LTS and Node.js 22 LTS are the current production recommendations. Node.js 18 reached end of life in April 2025 and carries unpatched vulnerabilities. If your application is on Node.js 18 or earlier, a version upgrade should be treated as a priority task.
Yes. We work as the Node.js team behind a number of UK agencies. The team operates under your brand, client calls, deliverables, and code with no reference to KiwiCommerce. Your clients see your standard. We write Node.js.
A focused REST API build typically takes two to six weeks. A NestJS microservices project runs two to five months depending on services and integrations. Real-time backends vary by scope. We give you a fixed timeline with defined milestones before development begins.
Our UK-based Node.js development team is ready to look at your project. Whether you need a dedicated Node.js developer on a monthly retainer, a senior Node.js architect for a complex backend, a Node.js development team for a full API build, or expert Node.js development services for an eCommerce backend, get in touch today. We respond within one business day.
Get In Touch