Service · Next.js
Next.js consulting for App Router teams
Senior Next.js work for teams moving to the App Router or already there. Architecture, server components, performance and Pages Router migrations, done by engineers who ship Next.js apps for a living.
Next.js shifted the model with the App Router. Server components changed how data flows. The cache layers grew. Streaming, suspense and partial rendering arrived. The old playbook does not always apply, and the new one is still being written in real codebases.
Teams hit similar walls. Too much logic in client components when a server component would do. Cache headers fighting the implicit fetch cache. Layouts that re-render the world when one route segment changes. Pages Router code ported piece by piece without a clear plan, leaving hybrid systems no-one fully owns.
We work with you to make the App Router earn its keep. The first step is reading the code and the data flow. The second is fixing the bottlenecks. The third is leaving the team with patterns they can extend, not a black box only we understand.
What we do
Next.js engagements, four ways
Pick the shape that matches what you need this quarter.
Architecture review
A full read of the App Router layout, the data flow and the boundaries between server and client work. You get a written report with the trade-offs called out and a ranked refactor backlog.
- Server vs client component boundaries
- Layout structure and route segment cost
- Data fetching: RSC, route handlers, server actions
Performance and Core Web Vitals
Real performance work, not a Lighthouse snapshot. RSC streaming, cache tuning, image and font loading, third-party scripts. We measure with real-user data, not synthetic averages.
- RSC streaming and suspense boundaries
- Cache layer audit: fetch cache, route cache, ISR
- next/image, next/font and third-party tuning
Pages Router to App Router migration
A staged migration plan that does not freeze the team. Both routers can coexist, so we move route by route and validate as we go. Server components replace getStaticProps and getServerSideProps where it pays off.
- Incremental adoption with both routers running
- Shared layouts and progressive RSC adoption
- Cutover plan with rollback checkpoints
Hands-on senior delivery
Feature work on Next 14 and 15 with TypeScript. Auth, payments, integrations, and the boring parts that ship product. We work alongside your team, review pull requests and bring patterns the team can keep using.
- Next 14 and 15 with TypeScript and App Router
- Pull request review with written feedback
- Async-friendly, EU/UK/US timezones
How an engagement looks
Short discovery, written scope, then real work. No long sales process.
- 1
Discovery call
A free 30-minute call. You walk us through the codebase, the team and the deadlines. We ask the awkward questions early so the scope is honest.
- 2
Written scope and proposal
Within two business days you get a written scope with deliverables, timeline and a fixed price or weekly rate. Nothing locked in until you sign off.
- 3
Architecture review or sprint kickoff
Audits run for one week of deep reading and a written report. Delivery work starts inside your sprint cadence from day one.
- 4
Weekly delivery and code review
A weekly check-in, async PR reviews and a Slack channel for the day-to-day. You always know what's shipping next.
FAQ
Common questions
App Router or Pages Router for a new project?
App Router for anything new, with one caveat: if the team is small and the app is mostly client-side, the learning curve on RSC can slow the first weeks down. The trade-off is worth it for most projects, but go in with eyes open.
How do you migrate from Pages Router to App Router?
Incrementally. Both routers run side by side, so we move one route segment at a time. High-traffic pages first if performance is the driver, low-risk pages first if learning is. We keep a rollback path on every step.
Vercel, self-hosted or container deployment?
Vercel is the path of least resistance, especially for ISR and edge. Self-hosting on a Node server is fine when you need control or cost predictability. Containers are common in regulated environments. We have shipped all three.
Server components or client components, when do you pick which?
Default to server components. Move to client components when you need state, effects, browser APIs or event handlers. The mistake we see most often is shipping client components everywhere by default, then wondering where the bundle came from.
What about authentication?
NextAuth (Auth.js) for most projects. Clerk when the team wants to outsource the UI entirely. Custom for highly regulated cases. We have built and audited all three patterns, and we can advise based on your compliance and integration needs.
What's your data fetching strategy?
RSC for server-rendered reads, route handlers for client-side queries and mutations, server actions for form-style writes. React Query or SWR layered in for client cache when the app needs optimistic updates. See React: The Road To Enterprise for the broader patterns.
Last updated: 2026-05-20
Next step
Next.js codebase that needs senior eyes?
Tell us about the team, the stack and the timeline. We reply within two business days.