Expertise / React Applications

Frontend Engineering

React applications built for
real operational complexity

Business-critical React fronts: operator dashboards, SaaS, portals and live data. Fast to use, maintainable after the third team. Send the brief. Estimate within 24 hours.

What we build

Frontend capabilities

The applications below share one trait: the interface is the operation, so latency, permissions and correctness are product requirements.

Complex dashboards and real-time interfaces

Live data, layered filters and dense tables in interfaces that stay responsive while the stream keeps arriving. State is designed around the update pattern, not retrofitted to it.

SaaS frontends and admin systems

Product surface and operator surface built together: onboarding, billing screens, feature flags, support tooling and the internal admin that keeps the whole thing running.

Multi-tenant and role-based architecture

Tenant isolation, permission-aware routing and data scoping enforced on the server and reflected in the UI, so a customer never sees a screen they are not entitled to.

Design systems and component libraries

Typed, accessible component primitives with tokens for colour, spacing and typography — the layer that keeps a product consistent as the team grows.

SSR and performance

Server-side rendering with React Router v7 or Next.js, code splitting, asset budgets and Core Web Vitals treated as a release criterion rather than a report.

Multi-language architecture

SSR-safe internationalisation with per-language routing, hreflang and canonical handling. This site runs the same architecture across nine languages.

Approach

How we keep a large React codebase workable

Complexity is unavoidable in operational software. These are the decisions that keep it from compounding.

01

Types at the boundaries

TypeScript across components, state and API contracts. Data shapes are validated where they enter the app, so a backend change surfaces at build time rather than in production.

02

State that matches the domain

Server cache, UI state and domain state are separated deliberately. Redux Toolkit where shared state is genuinely shared, local state everywhere else.

03

Rendering cost is a design input

Memoisation, virtualisation and stable references applied where profiling says they matter, not sprinkled across the codebase as a habit.

04

Accessible by construction

Semantic markup, keyboard paths and focus management built into the component primitives, so accessibility does not depend on the discipline of each feature author.

05

Modernisation without a freeze

Legacy Angular and jQuery front ends replaced route by route behind a stable shell, keeping the product shippable throughout the migration.

06

Maintainable on handover

Documented architecture decisions, consistent module boundaries and a test suite your own team can extend after we step back.

In every frontend project

Peer code review
Unit tests
Integration tests
End-to-end scenarios
CI/CD quality gates
Performance profiling
Accessibility checks
Documentation
Technology

What we work with

React Native is part of our stack for cross-platform work; ask us about current mobile availability before scoping.

Core
  • React 19
  • TypeScript
  • Next.js
  • Vite
State & routing
  • Redux Toolkit
  • React Router v7
  • SSR hydration
  • URL-driven state
Styling
  • SCSS Modules
  • Design tokens
  • Component primitives
  • Responsive layouts
Platform
  • Node.js / Express
  • PostgreSQL
  • Docker
  • CI/CD pipelines
FAQ

React applications in production

Business-critical front ends: operator dashboards, SaaS products, admin tools, customer portals and real-time data interfaces. React 19, TypeScript, SSR and design systems that stay maintainable after a third team touches them.
Yes. Typical work is performance, design-system extraction, SSR, multi-tenant access and making a codebase that has become slow to change ship again.
Language routing, server-rendered HTML, hreflang and structured data are part of the default architecture, not an add-on. The same pattern this site uses.
React 19, TypeScript, Redux Toolkit, React Router v7, SSR, SCSS modules, Node.js. We change that when the domain requires it.

Send the brief. Estimate in 24 hours.

New surface or a codebase that has become slow to change. Send the context. Architecture view and a 24h estimate within one business day.