When React is the right foundation
React suits highly interactive interfaces: dashboards, admin panels, booking flows, collaborative tools and customer portals. Its component model, large ecosystem and hiring pool make it a low-risk choice for products that will be maintained for years by changing teams.
React itself is a UI library, not a full framework. Whether to pair it with Vite as a client-rendered single-page app or with a framework such as Next.js depends on SEO, first-load speed and how much server logic sits close to the UI.
| Setup | Good fit | Not a good fit |
|---|---|---|
| React + Vite (SPA) | Logged-in dashboards, internal tools, embedded widgets | Public pages that need search visibility |
| React + Next.js | Marketing sites, SaaS products, content and commerce | Very small static widgets with no routing |
| React Native | iOS and Android apps sharing logic with the web | Web-only products |
React 19 features we use in production
- Server Components to fetch data on the server and send less JavaScript to the browser, available through frameworks such as Next.js.
- Actions and useActionState for form submissions with built-in pending and error states.
- useOptimistic to show instant feedback for likes, edits and status changes while the server confirms.
- The use API to read promises and context inside Suspense boundaries.
- The React Compiler to apply memoization automatically, which removes most hand-written useMemo and useCallback calls.
We adopt these features where they reduce complexity, and keep client-side patterns such as TanStack Query for dashboards that poll or stream frequently changing data.
Architecture and state management
Most state problems in React apps come from treating server data as client state. We keep a clear split: server data through Server Components or TanStack Query, URL state in the router, form state in the form library, and only genuinely global UI state in a small store such as Zustand.
Components are organized by feature, not by type, and shared building blocks live in a versioned design system documented in Storybook. When a product has both a web app and a mobile app, we share TypeScript types, validation schemas and API clients with the React Native codebase to keep behavior consistent.
Testing and accessibility
- Vitest for logic and hooks, with React Testing Library for components queried by role and label, the way users find them.
- Playwright for end-to-end flows across Chromium, Firefox and WebKit, including mobile viewports.
- Storybook interaction and visual regression tests for design system components.
- Automated accessibility checks with axe in component and browser tests, plus manual keyboard and screen reader review of key flows.
Accessible markup is not only a legal consideration under the ADA; it also improves usability and test stability, because tests that query by role break less often than tests tied to CSS classes.
Performance tuning for React apps
We measure Core Web Vitals, especially Interaction to Next Paint, using real-user monitoring rather than lab scores alone. Common improvements include code splitting by route, virtualizing long tables, deferring third-party scripts, and moving data fetching to the server so the browser parses less JavaScript.
The React DevTools Profiler and browser performance panels show which components re-render and why. With the compiler handling routine memoization, remaining issues are usually large context values, heavy synchronous work in event handlers, or oversized dependencies in the bundle.
Forms, data fetching and error handling
Forms are where most business apps spend their complexity. We pair React Hook Form or native Actions with Zod schemas shared with the backend, so the browser and the server validate with exactly the same rules and error messages stay consistent.
Every data-driven view has explicit loading, empty and error states. Error boundaries contain failures to the widget that broke instead of blanking the page, and errors are reported with enough context, such as route, user role and release version, to reproduce them quickly.
Modernizing older React codebases
Many teams run React apps built on class components, Create React App or older state libraries. We move them to Vite or Next.js, current React and strict TypeScript in stages, adding tests around critical flows before each change so releases continue while the codebase improves.
- Audit dependencies and remove abandoned packages first, because they usually block React upgrades.
- Swap the build tool and test runner, then upgrade React itself.
- Convert high-change components to function components and hooks, leaving stable screens until they need work.
- Enable the React Compiler and stricter lint rules once the code follows the Rules of React.
Larger rewrites and platform migrations are covered by our app modernization services.
How React fits our stack and services
Public-facing products usually run React inside Next.js with the App Router for server rendering and SEO, while logged-in tools often run as a Vite SPA. Both connect to typed backends on Node.js and share validation logic with the API.
Our web app development service covers discovery, design and delivery for React projects, and products that need offline support or home-screen install can be built as a progressive web app. Interface work is paired with our UI and UX design team, so design tokens map directly to React components.