Hire Next.js developers, from $1,500 a month

The page you are reading is a Next.js App Router route that our own team wrote and deployed. Most of this list can be checked from your browser.

• Static prerendering. This route is app/hire-developers/[slug]/page.js. generateStaticParams lists every slug and dynamicParams is false, so each page is built once as static HTML and an unknown slug gets a 404.
• Server-rendered copy, one client component. All the text and the form markup arrive in the first HTML response. A single 'use client' component attaches the behaviour after load: form submission, the modal and the counters.
• Metadata API. The root layout sets a title template, metadataBase and a canonical. Each hire page returns its own title, description, canonical, Open Graph and Twitter fields from generateMetadata.
• JSON-LD. Organization and WebSite blocks on every page. This page adds WebPage, Service with a monthly Offer, FAQPage and BreadcrumbList.
• sitemap.js and robots.js. The sitemap is generated from the same data files as the pages, and each hire page's lastmod is the date its copy changed, not the build date. robots.js and the middleware keep preview deployments out of search.
• Fonts, form and hosting. Montserrat and Public Sans load through next/font/google. The enquiry form posts to a route handler that validates the body with Zod, and it carries a hidden honeypot field that a real visitor never fills in. The site is on Vercel, and its response headers say so.

The unflattering part: the site runs Next.js 14.2 and is written in JavaScript, not TypeScript. The support policy above lists 14.x as unsupported, so we face the same version 16 upgrade the next section describes for clients.

One lesson from this codebase: a Server Component cannot read a string constant exported from a 'use client' file. It receives a client reference, not the value. So the shared markup for these pages lives in a module with no directive, which both sides can import.

1. Where does 'use client' go, and what does putting it at the top of a root layout cost?

Strong: it goes on the smallest interactive piece, such as the search box, not the layout around it. They know every module imported below that line joins the browser bundle. So a provider at the root means more JavaScript to download and hydrate, in files that cannot hold secrets. Their fix is a thin client provider that takes Server Components as children, which stay on the server.

2. How is data cached in the version we run, and how do you invalidate it?

Strong: they ask for your version first. Since version 15, fetch is not cached by default. Version 16 adds use cache, with cacheLife and cacheTag. revalidateTag serves the stale page while it refreshes. updateTag works only in Server Actions and makes the user's own write visible at once.

3. A page throws a hydration error in production only. How do you find it?

Strong: they name causes from the official list: a <div> inside a <p>, typeof window checks or dates in render logic, a browser extension, or a CDN that rewrites HTML. They call suppressHydrationWarning an escape hatch, not a fix.

4. Which of our routes should be static, and which dynamic?

Strong: marketing and catalogue pages prerender through generateStaticParams, with dynamicParams deciding whether unknown paths render on demand or return 404. Anything that reads cookies, headers or search params runs per request. With Cache Components switched on, they isolate those reads behind <Suspense> so the remainder of the page stays static.

5. How do you handle environment variables and secrets?

Strong: only variables prefixed NEXT_PUBLIC_ reach the browser, and their values are inlined at build time. So a Docker image promoted from staging to production keeps the staging values. Secrets are read on the server only.

6. How would you measure LCP and INP on our site?

Strong: from real visitors, at the 75th percentile, split by mobile and desktop. They know a Lighthouse run has no user input and cannot measure INP, and they mention useReportWebVitals for sending field data to your analytics.

7. We self-host in containers. What differs from Vercel?

Strong: four things. A shared cache handler, so every container serves the same pages. Tag invalidation that reaches every instance. One build ID and one Server Actions encryption key across all of them. Proxy buffering off, so streaming works.

Next.js is rarely the whole system. Which of these four shapes you have changes who you need.

• Mostly component work in an existing app. You may not need a Next.js specialist. In the 2025 Stack Overflow Developer Survey, 20.8% of the 23,678 people who answered the web frameworks question listed Next.js, against 44.7% for React. See React developers.
• Next.js in front of a separate API. Route handlers suit a thin layer that serves the web app alone. Once the API has other consumers, such as a mobile app, or runs queues and scheduled jobs, it usually belongs in its own service. See Node.js developers.
• Next.js in front of Python and AI services. This is the shape of our Eatverse build: a Next.js dashboard over Python and LLM agents, monitoring catalog and supply-chain data for 12 food brands.
• The whole product in one pair of hands. When the Next.js app, its route handlers and the database are one person's work, a full-stack developer on the same $1,500 starting rate removes the handoffs. Ask for a Next.js specialist when the framework decisions fill the month on their own: routing, rendering, caching and the build.

If nobody on your side sets priorities or reviews pull requests, you need a project team rather than a contract developer. That is software development, the model behind the three case studies below.