React Frontends That Feel Fast and Work Properly
React and Next.js development at Sentinel Infotech is built around three things that most projects compromise on: speed on first load, accessibility for all users, and code that the next developer can actually maintain. We care about the details that most developers skip: keyboard navigation, loading states, error boundaries, and performance on real devices rather than a developer machine.
- Single-page apps, SSR, and static sites with Next.js
- Headless WordPress frontends with React or Next.js
- Data dashboards and interactive admin interfaces
- Reusable component libraries with Storybook documentation
React and Next.js Projects We Deliver
From a complex single-page application to a headless WordPress frontend. Here is what we build and the approach we take with each type.
Single-Page Applications
React SPAs are the right choice for applications where the user interface needs to feel instant and responsive after the initial load. Internal tools, dashboards, booking flows, and applications behind a login are all well-suited to this approach.
- Client-side routing with React Router
- REST API or GraphQL data layer
- Authentication with JWT or session tokens
Next.js Web Applications
Next.js gives you control over how each page is rendered: server-side at request time, statically at build time, or a mix of both. That flexibility matters when you are building a site that needs both good SEO and a fast, dynamic user experience in the same application.
- App Router with SSR, SSG and ISR
- Optimised images, fonts, and scripts
- SEO-friendly page and metadata management
Headless WordPress Frontends
Your content team keeps the WordPress editor they already know. The website gets a React or Next.js frontend that is faster, more flexible, and completely decoupled from WordPress's template system. We connect the two via the WordPress REST API or WPGraphQL depending on the project requirements.
- REST API or WPGraphQL data layer
- Preview mode for content editors
- Static generation with incremental revalidation
Data Dashboards and Admin Interfaces
Complex data presented clearly, updated in real time, and usable without a manual. We build dashboards and admin interfaces with charting, filtering, role-based views, and export capabilities. The kind of interface that makes the person using it look competent rather than the kind that makes them call IT.
- Recharts, Chart.js, and D3.js visualisations
- Real-time data with polling or WebSockets
- Filterable tables with CSV and PDF export
Component Libraries
Design systems and component libraries that give your engineering team a shared set of building blocks. Every component is documented, tested, and built to be composed rather than copy-pasted. Storybook provides a living style guide that stays current with the code rather than drifting out of date.
- Storybook documentation with live examples
- TypeScript typed component props
- NPM package publishing for reuse across projects
E-Commerce Frontends
React frontends for WooCommerce or custom e-commerce backends. Faster product pages, better filtering, smoother cart interactions, and checkout flows that do not feel like they were designed in 2012. We keep WooCommerce handling orders and payments while React handles the shopping experience.
- Fast product filtering and search
- Persistent cart state across sessions
- WooCommerce REST API integration
React or Next.js — Which Is Right for Your Project?
Both are excellent tools. The right choice depends on your specific requirements, not a personal preference for one over the other.
React SPA
A React single-page application loads once, then handles all subsequent navigation on the client. After the first load, navigation feels instant.
- Internal tools and applications behind a login
- Data dashboards with frequent updates
- Multi-step forms and booking flows
- Projects where SEO is not a priority
Next.js
Next.js adds server-side rendering and static generation on top of React. Pages arrive already rendered, which is better for SEO and for users on slower connections.
- Public-facing websites where SEO matters
- E-commerce product pages and category listings
- Headless CMS or WordPress frontends
- Content-heavy sites that need fast first-load times
The React Ecosystem We Work In
We pick tools based on what the project actually needs rather than defaulting to the most popular option at the time. The list below reflects what we use on a regular basis in production.
How We Write React Code
Fast, accessible, maintainable. The three things that matter most and the three things most React projects compromise on somewhere.
Performance by Default
We use code splitting, lazy loading, and memoisation where they make a measurable difference rather than where they look clever. We measure before and after every significant optimisation. React DevTools profiler and Lighthouse are open throughout development, not just at launch.
Accessibility as Standard
WCAG 2.1 compliance is built in from the start. Proper semantic HTML, ARIA labels where needed, keyboard navigation, focus management in modals and menus, and sufficient colour contrast. We use automated accessibility testing in CI as well as manual keyboard testing during development.
TypeScript Throughout
We write TypeScript on all new projects. It catches a category of bugs at compile time that would otherwise appear in production, and it makes the codebase significantly easier to work with as it grows. Types are not just documentation — they are a safety net that works automatically.
Component Architecture
We separate presentational components from data-fetching logic, keep components focused on one job, and use custom hooks to encapsulate reusable behaviour. Components should be easy to read in isolation. If you need to trace through five files to understand what a button does, something has gone wrong.
React Projects We Build Most Often
React handles a wide variety of use cases. Here are the project types we deliver most regularly.
SaaS Frontends
Multi-page application frontends for SaaS products with complex state and role-based views.
Analytics Dashboards
Business intelligence dashboards with live data, filterable charts, and exportable reports.
E-Commerce Frontends
Fast, modern storefronts backed by WooCommerce or a custom commerce backend.
Headless CMS Sites
Next.js frontends consuming content from WordPress, Contentful, Sanity, or Strapi.
Booking and Scheduling
Multi-step booking flows with availability calendars, slot selection, and confirmation flows.
Client Portals
Secure self-service portals for clients to view documents, track progress, and manage their account.
Design Systems
Reusable component libraries with Storybook documentation, used across multiple products or teams.
Interactive Form Flows
Complex multi-step forms with conditional logic, validation, progress saving, and API submission.
We needed a Next.js frontend for our headless WordPress setup and Sentinel Infotech delivered something genuinely impressive. The Lighthouse scores were in the 90s on first delivery, the codebase was clean, and the handover documentation was thorough. Exactly what you want.
Questions About Our React Service
Straight answers to what clients ask us most before starting a React or Next.js project.
When should I use Next.js instead of plain React?
If SEO matters to your project, or if you need pages to load fast on first visit for users on slower connections, Next.js is usually the better choice. It handles server-side rendering and static generation in ways that plain React cannot. For internal tools, dashboards, or apps behind a login where SEO is irrelevant, a standard React SPA often works just as well. For applications dealing with large datasets, pairing Next.js with proper MySQL database optimization ensures the backend keeps up with the frontend's performance.
Can you build a React frontend for our existing WordPress site?
Yes. This is one of the most common patterns we work with. Your custom WordPress development project handles content management and exposes data via its REST API or WPGraphQL. The React or Next.js frontend consumes that data and handles the presentation layer. You keep the familiar WordPress editing experience and gain a much faster, more flexible frontend.
How do you handle state management in React applications?
The right approach depends on the complexity of the application. For most projects, React Context and built-in hooks are sufficient. For more complex state requirements we use Zustand or Redux Toolkit. We avoid over-engineering state management for simple applications because unnecessary complexity creates maintenance problems down the line.
Do your React applications work well on mobile?
Yes. We build responsive React applications as standard. Mobile layout, touch interactions, and performance on slower mobile connections are all considered during development, not retrofitted at the end. We test on real devices, not just browser emulators.
Can you migrate an existing React codebase to Next.js?
Yes. We assess the existing React application, identify what the migration would involve, and provide a clear plan before starting any work. The migration is done incrementally where possible to avoid rewriting a working application from scratch. We confirm the scope and timeline before anything begins.
Do you provide React component documentation?
Yes. For component library projects and larger applications, we document components using Storybook. This gives your team a live reference for every component including its props, variants, and usage examples. For smaller projects, we provide written documentation as part of the project handover. For projects combining React with WordPress, our WordPress maintenance services keep the CMS layer secure, updated and running cleanly alongside the React frontend.