Component architecture
Small components with clear props, custom hooks for shared logic and state kept close to where it is used, so new screens reuse rather than copy.
React development company · UK
React Development Company in the UK
Work with a UK-focused React development company for faster interfaces, cleaner component systems, and conversion-ready product screens. 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
React capabilities we bring to your product.
We screen React developers on the decisions that matter as an app grows: how components are split, where state lives and what re-renders when.
State that stays predictable
Server data in TanStack Query, shared client state in Redux Toolkit or Zustand, form state in React Hook Form — and no more prop drilling.
React 19 where it helps
Actions, useOptimistic and use() for forms and data loading, and the React Compiler in place of hand-written memoisation.
Performance and bundle size
Profiling wasted re-renders, virtualising long lists, splitting code by route and removing dependencies that bloat the bundle.
Accessible by default
Semantic HTML, keyboard support and focus management in modals and menus, checked against WCAG 2.2 AA in every pull request.
Tests that survive refactors
React Testing Library tests written around user behaviour, Playwright for critical journeys and Storybook to review components in isolation.
What we build
What we build with React.
Most React requests from UK teams fall into one of these — from a first design system to a codebase that has become hard to change.
Data-heavy product screens
Tables with server-side filtering and sorting, bulk actions, charts and role-based views that stay responsive as the data grows.
Design system components
A shared component library built on accessible primitives, themed from your design tokens and documented in Storybook.
Long forms and applications
Multi-step quotes, applications and onboarding flows with saved progress, conditional questions and error messages people understand.
Live operational screens
Dispatch boards, order queues and chat updated over WebSockets, with optimistic updates that reconcile cleanly with the server.
Front ends for your API
React clients for Node.js, Django or FastAPI services, with typed API calls, proper session handling, and loading and error states designed in.
Legacy React modernisation
Class components, Enzyme tests and Create React App builds moved to hooks, React Testing Library and Vite, one module at a time.
Technology stack
Technology stack.
The tools that usually sit around React in the projects we join. We fit into your stack — this is where we are most at home.
Foundations
React 19TypeScriptViteReact Router
State, data and forms
TanStack QueryRedux ToolkitZustandReact Hook Form and Zod
UI and design systems
Tailwind CSSRadix UIMUIStorybook
Testing and accessibility
Vitest or JestReact Testing LibraryPlaywrightaxe accessibility checks
APIs we connect to
Node.jsDjango and FastAPILaravelFirebase
Build and deploy
Next.js for server renderingVercelAWSGitHub Actions
Pricing
React development pricing.
Start with discovery, move to a fixed-price build, or run a dedicated team for a longer roadmap.
React 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 React 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 React 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 React 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 React 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 React 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 React 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 React 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
React projects from our case studies.
Client work where React 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 studyEducation · SaaS
University Management
University management system replacing spreadsheet enrolment and timetabling.
ReactNode.jsPostgreSQLAWS
Read the case studyHospitality · SaaS
Teppe
Restaurant operations platform: QR ordering, kitchen displays and loyalty.
ReactNode.jsStripeFirebase
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 React development company do?
A React development company plans, designs, builds, tests, deploys, and supports React 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 React 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 React development cost?
React 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 React product, not just provide developers?
Yes. You can use Techsleight Labs as a full React 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 React application?
Yes. We often join existing React 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 React 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 React 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 React project?
Tell us what you are building with React. 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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