React Development
Interfaces your usersreturn to.
The browser is where your customers and staff spend their day. We build React applications that are fast to load, reliable under use, and built to age — not to be replaced in two years when the developer who built them moves on.
What we provide
Fast, accessible React interfaces that perform as the product grows.
- Next.js web applications and marketing websites
- Complex data dashboards and interactive visualisations
- Customer portals, booking flows and account management
- Progressive web applications (PWA) with offline support
- Shared component libraries and internal design systems
- CMS integration (headless Contentful, Sanity, Strapi)
- Technical SEO — server-rendering, canonical URLs, sitemaps
- WCAG 2.2 AA accessibility compliance
Why Theerrv
Next.js by default
We build on Next.js for its server-rendering, incremental static regeneration and deployment model. The interface is fast by structure, not by tuning after the fact.
Core Web Vitals and accessibility
Performance and WCAG 2.2 AA accessibility are requirements, not options. We measure both before shipping — Lighthouse, axe and a manual keyboard pass on every release candidate.
TypeScript throughout
Typed components, typed API contracts, typed state. A type error at compile time costs nothing; a runtime error in production costs plenty.
Our approach
Discovery → Architecture → Development → Testing → Deployment → Support
Component and routing design
Information architecture, routing strategy, state management model and component hierarchy agreed before the first commit.
API contract agreement
If we are not building the backend, we agree on API contracts before UI development begins — so the interface is not blocked waiting for endpoints.
Incremental build
Features shipped to staging in fortnightly sprints. You interact with real software on a real URL — not Figma mockups.
Performance and accessibility audit
Lighthouse, axe-core and a manual keyboard and screen-reader pass run before every release candidate. Core Web Vitals are tracked from staging.
Deployment and CDN
Azure Static Web Apps or App Service, CDN configuration, cache headers, error tracking and uptime monitoring from launch day.
Technologies
The stack we use to deliver react development — chosen for longevity and maintainability, not trend.
- React 19
- Next.js 16
- TypeScript
- Tailwind CSS
- Zustand / Jotai
- React Query (TanStack)
- Zod
- Vitest / Testing Library
- Playwright
- Azure Static Web Apps
Industries & use cases
Customer-Facing Portals
- Account dashboards and self-service flows
- Booking and reservation management interfaces
- Document upload and approval portals
Internal Business Tools
- Operations dashboards and KPI displays
- Admin panels and content management interfaces
- Field service and mobile-first tools
Marketing and Corporate Sites
- High-performance marketing sites with SSG
- Product landing pages with A/B testing
- Blog and content platforms with headless CMS
Data Products
- Interactive analytics dashboards
- Real-time monitoring and alerting UIs
- Drill-down reporting interfaces
Common questions
Should we use React or a simpler framework for our website?
React with Next.js is the right choice when the application has meaningful interactivity, personalisation, or complex state — customer portals, dashboards, booking flows. For a primarily static marketing site, Next.js with static generation is still a strong choice. For a simple brochure site with no dynamic content, a lighter framework may be faster and cheaper to maintain. We will recommend the right tool for your actual requirements.
How do you ensure the application performs well?
Performance is built in, not added after. We use Next.js server-side rendering and static generation to reduce client-side JavaScript, optimise images with Next/Image, set correct cache headers, and track Core Web Vitals from staging. Before launch, every page passes a Lighthouse audit with a target LCP under 2.5 seconds on a mid-range device.
Can you build a React app that works on mobile?
All the applications we build are responsive by design — tested on iOS Safari, Chrome Android and desktop across a range of viewport widths. If the application needs to work offline or be installable from the home screen, we build it as a Progressive Web App with a service worker and app manifest.
How do you handle React application maintenance?
React and the broader ecosystem evolve quickly. Under our maintenance arrangement we keep the application's dependencies current, monitor for security advisories, and apply patches on a regular schedule — not reactively when something breaks in production.
Related services
Start here
Tell us what theoperation is costing you.
A first conversation is a conversation, not a pitch. Describe how the work runs today and we will tell you plainly whether software is the right answer — and what it would take.
Or reach us directly at info@theerrv.com