React.js Development

Interactive interfaces for data-heavy products

React applications and component libraries for dashboards, GIS viewers, back-offices and design systems. TypeScript, modern state management and thorough testing — whether as a Vite single-page app, embedded in an existing site or as the foundation for Next.js and React Native.

React 19
concurrent rendering
TypeScript
typed components
Vite
sub-second dev builds
LayerPanel.tsxTSX
1import { useLayers } from "@/store/layers";
2import { Switch } from "@/ui/Switch";
3
4export function LayerPanel() {
5 const { layers, toggle, reorder } = useLayers(); // Zustand store
6
7 return (
8 <aside aria-label="Map layers" className="panel">
9 {layers.map((layer, i) => (
10 <div key={layer.id} className="row" draggable
11 onDragEnd={(e) => reorder(i, e)}>
12 <Switch
13 checked={layer.visible}
14 onChange={() => toggle(layer.id)}
15 label={layer.title}
16 />
17 <span className="mono">{layer.featureCount.toLocaleString()}</span>
18 </div>
19 ))}
20 </aside>
21 );
22}

Representative React.js code from our projects

01Why React.js

What React.js does better than the alternatives

01

Component model that scales

Small, typed components compose into large applications without the codebase becoming unmanageable.

02

Best-in-class ecosystem

TanStack Query and Table, Zustand, React Hook Form, Radix, Storybook and Testing Library cover every product need.

03

Straight path to mobile and SSR

The same skills and often the same code move to React Native and Next.js when the product grows.

04

Map-friendly

Mapbox GL JS, MapLibre, deck.gl, Leaflet and the ArcGIS Maps SDK all have mature React bindings.

Choose React.js when

  • Complex, stateful UIs — dashboards, editors, map viewers, back-offices
  • A reusable component library or design system shared across products
  • Embedding interactive widgets into an existing site or portal
  • Teams planning to extend into Next.js (web) or React Native (mobile)

Not sure it fits? Compare with the alternatives below or ask us — recommendations are part of every consultation.

React.js vs. alternatives

02What we build with it

React.js in production

GIS viewers and editors

Layer management, drawing, querying and printing on ArcGIS, Mapbox or MapLibre.

Operational dashboards

Real-time KPIs, charts, tables and alerts for control rooms and managers.

Admin and back-office tools

CRUD-heavy internal apps with role-based access and audit trails.

Design systems

Token-driven component libraries with Storybook documentation.

Embedded widgets

Booking, calculator, map or configurator widgets dropped into any site.

Data-entry applications

Multi-step forms with validation, autosave and offline tolerance.

03How we work with React.js

6 ways we deliver on React.js

From greenfield builds to rescues and migrations — each engagement is scoped, estimated and delivered by engineers who work in React.js daily.

01

Single-page applications

Vite + React + TypeScript with file-based or TanStack Router, code splitting, environment configs and deploy pipelines to any static host or container.

  • Vite
  • TanStack Router
  • React Router
  • TypeScript

02

State & data layer

Server state with TanStack Query, client state with Zustand or Redux Toolkit, forms with React Hook Form and Zod — chosen for the app's complexity, not by habit.

  • TanStack Query
  • Zustand
  • Redux Toolkit
  • React Hook Form

03

Component libraries & design systems

Accessible components on Radix or Headless UI, design tokens, theming (light/dark), Storybook docs and visual regression tests.

  • Radix UI
  • Tailwind CSS
  • Storybook
  • Chromatic

04

Maps & data visualisation

react-map-gl, deck.gl, ArcGIS Maps SDK components, Recharts/Visx and virtualised tables for large datasets.

  • react-map-gl
  • deck.gl
  • ArcGIS Maps SDK
  • Recharts
  • TanStack Table

05

Testing & quality

Vitest and Testing Library for components, Playwright for end-to-end flows, ESLint/TypeScript strictness and CI gates on every pull request.

  • Vitest
  • Testing Library
  • Playwright
  • ESLint

06

Upgrades & legacy migration

Class-to-hooks migrations, Create React App to Vite, AngularJS/jQuery to React, and React 19 upgrades with codemods and incremental rollout.

  • Codemods
  • Vite
  • React 19

04Where it sits

React.js in a complete stack

No technology ships alone. This is the reference architecture we start from on React.js projects — the highlighted layer is where React.js lives; the rest is chosen to fit your data, hosting and team.

Ecosystem we use daily

  • React
  • TypeScript
  • Vite
  • TanStack Query
  • TanStack Table
  • Zustand
  • Redux Toolkit
  • React Hook Form
  • Zod
  • Radix UI
  • Tailwind CSS
  • Storybook
  • react-map-gl
  • deck.gl
  • Vitest
  • Playwright

Reference architectureReact.js layer

  1. 01 · UI
    • React components
    • Design system
    • Maps / charts
  2. 02 · State
    • TanStack Query
    • Zustand / RTK
    • Forms (RHF + Zod)
  3. 03 · Build & routing
    • Vite
    • TanStack / React Router
    • Code splitting
  4. 04 · APIs
    • REST / GraphQL
    • ArcGIS services
    • WebSocket
  5. 05 · Hosting
    • CDN / static
    • Docker
    • Next.js (SSR)

05Honest comparison

React.js or something else?

React.js vs Next.js

Choose plain React for internal tools and embedded widgets; choose Next.js when SEO, server rendering or first-load performance matter.

React.js vs Angular

Choose React for flexibility and ecosystem breadth; Angular suits organisations already standardised on it — we maintain both.

Still undecided? The web technology guide walks through when we recommend each option.

All web technologies

06FAQ

React.js questions

Looking for the full service? React.js work is delivered under our Web Development practice.

Yes. React is our default recommendation, but we maintain Angular (including Ionic apps) and Vue projects for clients who have standardised on them.

Start a project

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