Next.js development company
Krapton plans and builds Next.js products where rendering, caching and hosting are decided route by route: Server Components for data-heavy pages, client components only where interaction needs them, and a host chosen for your traffic.
- Senior engineers · IST + EST overlap
- NDA on day 1
- 24-hour reply
- Projects shipped
- 50+
- Code ownership
- 100%
- Client rating
- 4.8/5
- First reply
- 24h
Next.js decisions that are expensive to reverse
As a Next.js development company, Krapton designs, builds and modernizes applications on the App Router, React Server Components and Server Actions, and keeps older Pages Router code working while it moves. Most of the cost in a Next.js project sits in a few early choices: which routes render statically, which stream from the server, where the use client directive draws the client boundary, and how cached data is invalidated when content changes. Get those wrong and you pay later in stale pages, oversized client bundles or a hosting bill that climbs with every request. Our Next.js development services start by writing those choices down per route, then implementing them with typed data access, tag-based revalidation and tests that run against a production build. We deploy to Vercel when its preview and edge features earn their price, or self-host with standalone output in containers or OpenNext on AWS when control and cost predictability matter more.
Next.js development services
App Router product builds
New Next.js applications on the App Router with Server Components, streaming through Suspense, Route Handlers for public APIs and Server Actions for mutations, typed end to end with TypeScript and Zod.
Pages Router migration
Incremental moves from the Pages Router to the App Router, one route at a time, replacing getServerSideProps and getStaticProps with server-side data fetching while both routers run in the same app.
Caching and revalidation design
Explicit cache rules per route, tag-based invalidation wired to CMS or database webhooks, and a shared cache handler when several self-hosted instances must serve identical data.
Headless commerce and content
Storefronts and content sites backed by Shopify, Sanity, Contentful or Payload, with Draft Mode previews for editors and generateMetadata producing correct titles, canonical URLs and Open Graph tags.
Vercel, AWS or containers
Production setups on Vercel, on AWS through OpenNext, or as standalone Node.js containers behind a CDN, with image optimization, secrets and preview environments configured for the chosen target.
Core Web Vitals work
Bundle analysis, moving client-only libraries out of shared layouts, next/image and next/font tuning, and real-user field data to fix LCP, INP and layout shift where they actually occur.
Why teams choose Krapton for Next.js
Senior engineers, fixed scope, and code you own — the things agencies promise and rarely deliver.
Rendering chosen per route
We document whether each route is static, dynamic or partially prerendered, and why, so later contributors know which pages can serve from cache and which must reach the database.
Authorization below the middleware
Since the 2025 middleware bypass advisory, request middleware cannot be the only access check; our engineers repeat session and role checks inside Server Actions, Route Handlers and the data layer.
Hosting without lock-in
Code is written against Next.js APIs that also run outside Vercel, and the standalone build is tested early, so moving between Vercel, AWS or containers stays a deployment change.
Tests against production builds
Playwright runs against next build output rather than the dev server, because caching, prefetching and Server Component behavior differ between the two; Vitest covers client-side logic.
How a Next.js project runs with Krapton
01
Route inventory
We list every route with its data sources, freshness needs, auth rules and search value, then mark the rendering mode and cache lifetime each one needs.
02
Vertical slice first
One feature goes through the whole stack before the rest: server data fetch, Server Action mutation, revalidation, deployment and monitoring on your chosen host.
03
Feature sprints
Features ship behind pull requests with preview deployments, bundle-size diffs and Playwright runs, so you review working pages rather than screenshots or status notes.
04
Launch and observe
Redirect maps, sitemap and robots files, OpenTelemetry tracing through instrumentation.ts and error alerts go live together, followed by tuning against real traffic.
The Next.js stack we build with
Next.js development: questions answered
What does a Next.js development company do that a React agency might not?
It makes server-side decisions, not only component ones. A Next.js development company decides which routes prerender, how data is cached and revalidated, where Server Actions handle mutations, and how the app is hosted and observed. Those choices drive page speed, infrastructure cost and search visibility more than component code does. A team that only knows client-side React tends to mark everything as a client component and lose what the server offers.
When is Next.js the wrong choice?
Next.js is a poor fit for a logged-in dashboard with no search traffic and no server logic, where a Vite single-page app is simpler to build and host. It is also heavy for a mostly static content site, where Astro ships less JavaScript. And if your backend already lives in Python or Go, keep business logic there and use Next.js as a thin front end rather than a second backend.
Can you move a Create React App or Pages Router project to the App Router?
Yes, and it is done incrementally rather than as a rewrite. A Create React App project first moves its build to Next.js with client components, so routes keep working unchanged; data-heavy pages then become Server Components. A Pages Router app runs both routers side by side, so routes are ported one at a time and getServerSideProps disappears page by page until the old router is empty.
Why is our Next.js app slow or expensive to host?
Usually because too much renders dynamically or too much JavaScript reaches the browser. Typical causes are a cookies() or headers() call that makes a whole layout dynamic, fetches left uncached after Next.js 15 changed its defaults, large client libraries imported into shared layouts, and image optimization running for every size variant. We profile with build output, the bundle analyzer and server traces before changing code.
How do you handle Next.js upgrades and long-term maintenance?
Upgrades are planned, not left for emergencies. Each major release starts with the official codemods from @next/codemod, then a review of changed defaults such as async request APIs and caching behavior, a production build and a Playwright run on a preview deployment. Security fixes for Next.js and React Server Components go out as soon as they are published, because the framework sits directly on your request path.
Ready to build? Tell us what you have in mind.
Send a short brief and a senior engineer will reply within one business day with next steps — no sales fluff.