React applications built for
real operational complexity
Business-critical front ends: complex dashboards, SaaS platforms, internal tools, client portals and real-time data interfaces. Fast to use, and still maintainable after the third team has touched them.
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.
How we keep a large React codebase workable
Complexity is unavoidable in operational software. These are the decisions that keep it from compounding.
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.
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.
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.
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.
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.
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
What we work with
React Native is part of our stack for cross-platform work; ask us about current mobile availability before scoping.
- React 19
- TypeScript
- Next.js
- Vite
- Redux Toolkit
- React Router v7
- SSR hydration
- URL-driven state
- SCSS Modules
- Design tokens
- Component primitives
- Responsive layouts
- Node.js / Express
- PostgreSQL
- Docker
- CI/CD pipelines
Building or rescuing a React application?
Whether it is a new product surface or a codebase that has become slow to change, send us the context. We will come back with an architecture view and a realistic plan within 24 hours.