Web Development
Next.js & React Development
The stack this site is built on. Fast by default when used properly, and easy to make slow when it is not.
Next.js and React development produces applications that render on the server, load quickly and stay maintainable as they grow. The Nexclick builds with server components by default, ships as little client JavaScript as the job allows, and documents the architecture so another team could continue it.
Is this you?
What usually prompts the call
- Your React app renders in the browser and search engines index almost none of it.
- The JavaScript bundle has grown past a megabyte and nobody knows what is in it.
- You need genuine interactivity and genuine search visibility at the same time.
- Your current framework choice was made three years ago and is now the constraint.
What we do
The actual deliverables
Things that appear on an invoice, not adjectives.
- Rendering strategy decided per route
- Static generation, server rendering or client rendering, chosen per page rather than applied uniformly. Most sites need mostly static with a few dynamic islands.
- Server components by default
- Client components only where interactivity genuinely requires them. This is what keeps the shipped JavaScript small, and it is a discipline rather than a setting.
- Bundle budgets enforced in CI
- A per-route JavaScript budget that fails the build when exceeded. Without it, bundles grow monotonically and nobody notices until the site is slow.
- Typed data layer
- TypeScript throughout with validated boundaries, so a change to an API contract becomes a build error rather than a runtime failure.
- Accessibility at component level
- Focus management, keyboard behaviour and labelling correct in shared components, so every use inherits it instead of each developer solving it again.
- Caching and revalidation strategy
- What is cached, for how long, and how it invalidates. Getting this wrong produces either stale content or a site that rebuilds constantly.
- Documented architecture
- Written for a developer who has never seen it. Modern React has many valid approaches, and an undocumented one is a liability regardless of quality.
Checklist
How to tell a Next.js build was done properly
Modern React has many valid approaches and several common mistakes that only surface later. Run this against any Next.js codebase you own or are being handed — most failures show up in the first six items.
- 01View source on a content page — is the text in the HTML, or assembled by JavaScript?
- 02Is "use client" the exception rather than the default at the top of most files?
- 03Is there a per-route JavaScript budget enforced in CI, or just a hope?
- 04Are images using next/image with explicit dimensions and a priority hint on the hero?
- 05Are fonts self-hosted through next/font rather than loaded from a third party?
- 06Is the caching and revalidation strategy written down anywhere?
- 07Does TypeScript run in strict mode, with no suppressed errors at the boundaries?
- 08Are API responses validated at runtime, not just typed at compile time?
- 09Do shared components handle focus, keyboard and labelling, or does each usage redo it?
- 10Is there a preview deployment per branch?
- 11Do automated tests cover the critical journeys?
- 12Is there error monitoring in production?
- 13Is the architecture documented for someone who has never seen it?
- 14Could you deploy this without the agency that built it?
How it works
Step by step, with timeframes
Timeframes are typical rather than guaranteed, and they assume we get account access and approvals when we ask.
- 01Week 1–2
Architecture and scope
Rendering strategy, data sources, caching and deployment decided and written down before code. These are expensive to change once features exist.
- 02Week 2–4
Foundations
Component primitives, design tokens, typed data layer, CI pipeline and budgets. Slower to start, much faster from week five.
- 03Week 4–12
Build features
In increments with a preview deployment per branch, so anyone can look at a change before it merges.
- 04Week 12–14
Optimise and hand over
Performance verified on field data, accessibility audited, documentation written, and a walkthrough for whoever maintains it.
What you get
Reporting and ownership
- Preview deployments per branch, so review happens on a real URL rather than a screenshot.
- JavaScript budgets enforced in CI, so performance cannot regress unnoticed.
- Type safety across data boundaries, turning contract changes into build errors.
- Architecture documentation written for a developer who has never seen the codebase.
- Full repository ownership, with no dependency on us to deploy or maintain.
Tools and platforms
- Next.js (App Router)
- React & TypeScript
- Tailwind CSS
- Vitest & Playwright
- Lighthouse CI
- Vercel or Cloudflare
- Sentry
Timeline
How long this actually takes
Twelve to fourteen weeks for a substantial application, of which the first three weeks produce comparatively little visible output — foundations, typing and CI. That trade is deliberate and it is where the maintainability comes from. One honest note about this stack: React is not the right choice for every site. A content site with light interactivity is often better served by WordPress or Webflow, cheaper to build and far easier to find a developer for. We use Next.js where interactivity, performance and search visibility all genuinely matter at once.
Pricing model
Project, then retainer
Fixed price against a specification for a defined build, or a monthly team rate for ongoing product development alongside your own developers.
Questions
Next.js & React Development questions
Is Next.js good for SEO?
When it renders on the server or generates statically, yes — pages are fully crawlable and fast. When it renders only in the browser, no, and that is a common misconfiguration rather than a property of the framework. The framework enables both; the implementation decides which you get.
Should our marketing site be built in React?
Often not. A content site with light interactivity is usually better on WordPress or Webflow — cheaper to build, easier for your team to edit and far easier to find a developer for. React earns its cost where interactivity, performance and search all matter simultaneously.
What is the difference between server and client components?
Server components render on the server and ship no JavaScript to the browser. Client components ship their code so they can be interactive. Using client components by default is the single most common cause of a slow Next.js site, and it is a discipline problem rather than a technical one.
Are we tied to Vercel?
No. Next.js runs on Cloudflare, AWS, Netlify or a self-hosted Node server. Vercel is the smoothest option and some features are easier there. We will tell you which capabilities depend on the host so the choice is informed rather than assumed.
How do we stop the bundle growing over time?
Budgets enforced in CI that fail the build when exceeded. Without them, bundles grow with every feature and nobody notices until the site is measurably slow. This is one of the few performance problems that is genuinely solved by automation.
Can our existing team maintain it?
If they know React, largely yes — with a handover session on the architectural decisions. Modern Next.js has several valid patterns, so the documentation matters more than usual. That is why it is part of the deliverable rather than something offered afterwards.
Last reviewed 28 July 2026.
Tell us what you are trying to fix
A 20-minute call, no pitch deck. The Nexclick will tell you what we would do, roughly what it costs, and whether we are the right people for it.