React & MERN Stack Developer UK — Custom Web Apps Built to Scale
We build fast, scalable React applications and full MERN stack web apps for UK and worldwide clients. Next.js, TypeScript, Node.js APIs, headless WordPress and MongoDB — from £800. Free quote in 24 hours.
Everything We Build with React & MERN
From a simple React frontend to a full-stack MERN application with custom API — our developers build scalable, maintainable web applications for UK and worldwide clients.
React.js Application Development
Custom single-page applications (SPA) built with React.js and TypeScript. Component-based architecture, state management with Redux or Zustand, and seamless API integration for fast, interactive user experiences.
Next.js Development
Server-side rendered (SSR) and statically generated (SSG) Next.js applications. Better SEO than React SPA, faster load times, image optimisation and built-in API routes — our preferred framework for production apps.
Full MERN Stack Development
End-to-end full-stack applications using MongoDB, Express.js, React and Node.js. One JavaScript team handles your entire stack — frontend, backend, database and API — for faster delivery and better communication.
Headless WordPress + React
Blazing-fast headless WordPress with React or Next.js frontend. WordPress handles content management via WPGraphQL or REST API — React delivers a lightning-fast, app-like experience for visitors.
TypeScript Development
All our medium and large projects are built with TypeScript as standard. Type-safe React components, typed API responses and strict TypeScript configurations for maintainable, scalable codebases.
Node.js & Express API Development
Custom RESTful APIs and GraphQL backends built with Node.js and Express. Authentication, authorisation, rate limiting, caching and full API documentation with Swagger included.
MongoDB & Database Design
MongoDB database design and optimisation for MERN applications. Schema design, indexing strategy, aggregation pipelines and MongoDB Atlas cloud setup. PostgreSQL and MySQL also available.
Headless Shopify + React
Custom headless Shopify storefronts using the Storefront API and React or Next.js. Faster than standard Shopify themes, fully custom design and complete control over the shopping experience.
React App Migration & Refactoring
Migrate legacy JavaScript applications to React or TypeScript. Refactor class components to hooks, upgrade dependencies, improve performance and modernise your codebase without rebuilding from scratch.
The MERN Stack Explained
MERN is a full-stack JavaScript framework that lets one team build your entire web application — frontend, backend and database — using a single language.
React Tech Stacks We Build With
We recommend the right stack for your project — not the most trendy one. Here are the combinations we use most.
Next.js + TypeScript Most Popular
The gold standard for production React apps. SSR, SSG, image optimisation, API routes and TypeScript — everything you need for a fast, scalable web application.
MERN Stack Full-Stack
One JavaScript team, one codebase, one language. Perfect for startups and businesses wanting a complete custom web application built fast and efficiently.
Headless CMS + React Content-First
Best of both worlds — powerful content management with blazing-fast React frontend. Ideal for high-traffic sites needing great SEO and developer flexibility.
React + REST API API-First
React frontend consuming your existing or new REST API backend. Perfect for adding a modern frontend to an existing platform or integrating multiple data sources.
What UK Businesses Build with React & MERN
React and MERN are versatile technologies. Here are the most common applications our UK clients build.
SaaS Web Applications
Software-as-a-service platforms with user authentication, subscription billing, dashboards and multi-tenant architecture.
Headless eCommerce
Blazing-fast Shopify or WooCommerce storefronts with React frontend — faster than any traditional theme.
Web Portals & Dashboards
Admin dashboards, client portals, data visualisation tools and internal business applications.
Real-Time Applications
Chat applications, live notifications, real-time collaboration tools and booking systems using Socket.io.
Corporate Websites
High-performance Next.js corporate sites with CMS content management, multiple languages and global CDN delivery.
eLearning Platforms
Course platforms, membership sites, video streaming and student progress tracking built with MERN stack.
Booking & Scheduling Apps
Online booking systems, calendar integrations, availability management and automated confirmation systems.
API Integrations
React frontends that aggregate data from multiple APIs — Stripe, Salesforce, Google, HubSpot and more.
Our React & MERN Development Process
A structured 5-step process — from requirements to a production-ready React or MERN application.
Discovery & Scoping
We understand your requirements, define the tech stack, create a project roadmap and provide a fixed-price quote.
UI/UX Design
We design your application in Figma — component library, user flows and responsive layouts approved before coding begins.
Development Sprints
Development in 2-week agile sprints with regular demos. You see progress throughout — not just at the end.
Testing & QA
Unit testing, integration testing, end-to-end testing and performance auditing before any release to production.
Deploy & Support
We deploy to your chosen platform (Vercel, AWS, DigitalOcean) and provide post-launch support on every project.
React & MERN Development Pricing UK
All prices in GBP. Fixed quotes before work begins.
- React.js or Next.js application
- Up to 10 components / screens
- REST API integration
- TypeScript included
- Responsive, mobile-first design
- Basic authentication (JWT)
- 15 days free post-launch support
- Full MERN stack — frontend + backend
- Custom REST API with documentation
- MongoDB database design
- User authentication & role management
- Admin dashboard included
- TypeScript throughout
- Deployment setup (Vercel / AWS)
- 1 month free post-launch support
- SaaS platform or complex web app
- Multi-tenant architecture
- Stripe / payment integration
- Real-time features (Socket.io)
- Third-party API integrations
- Dedicated project manager
- Full test coverage
- 45 days priority post-launch support
💡 Headless WordPress + React from £1,200 · Monthly maintenance from £150/month
Why UK Businesses Choose Us for React & MERN
We are not a generalist agency that dabbles in React. It is one of our core specialisms.
TypeScript as Standard
We use TypeScript on all significant React and Next.js projects — fewer bugs, better maintainability and easier for future developers to work with.
Full-Stack JavaScript Team
One team handles React frontend and Node.js backend. No handoff delays, no communication gaps between frontend and backend teams.
Performance-Obsessed
We build for performance from day one — code splitting, lazy loading, image optimisation and Core Web Vitals compliance on every project.
Tested Code Only
We write unit tests, integration tests and end-to-end tests using Jest, React Testing Library and Cypress. No shipping untested code to production.
Agile with Transparency
2-week sprints with demos after each one. You see your application being built — not just receive a finished product 3 months later.
UK Registered, Global Team
Registered in Swindon, UK with a remote team across UK, USA and India. UK accountability, global expertise, competitive pricing.
React & MERN Technologies We Use
Every technology in our stack is production-tested, well-maintained and chosen for your project's specific needs.
What Our Clients Say
5.0 stars on Google. Real reviews from real clients across the UK and USA.
"I had the privilege of working with TeamsFreelancer, specifically Shiwani, and the quality of work was amazing. The company has a very high standard, competitive pricing, and a well outlined expectation of work. All preferences incorporated seamlessly."
"A huge thanks to TeamsFreelancer for flawlessly updating our complex, heavy website. Their deep technical knowledge, professionalism, and attention to detail truly impressed us. Results were beyond expectations."
"TeamsFreelancer delivered our React application on time and on budget. The code quality was excellent and the team was communicative throughout. The sprints approach meant we always knew where things stood."
Frequently Asked Questions
Everything UK businesses ask before starting a React or MERN project.
You May Also Need
Complement your React or MERN application with these related services from our team.
Ready to Build Your React or MERN Application?
Tell us what you need and we will send you a free, fixed-price proposal within 24 hours. No obligation, no pressure.
🌍 UK Registered · Remote team UK, USA & India · Serving clients worldwide · Response within 24 hours