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Web Development / 01 — Next.js engineering practice

The framework for the web, engineered like a production system.

We've shipped Next.js into production since the Pages Router. App Router, React Server Components, Server Actions, edge middleware, ISR — we treat the framework as infrastructure, not a website builder.

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01 — In numbers

Six years of
shipping Next.js
at production scale.

0+
Next.js apps in production
0ms
P50 TTFB · edge runtime
0%
Lighthouse perf · avg
0★
SPA-only handoffs
02 — Capabilities

A full Next.js practice.

Every layer the framework gives us — architecture, data, runtime, rendering — used deliberately, not by default.

app/
/ 01

App Router &
file conventions.

Routing as architecture. Layouts, loading and error boundaries, parallel and intercepting routes — built around the way your product actually flows.

  • ↳ Nested layouts & templates
  • ↳ Parallel + intercepting routes
  • ↳ Streaming with Suspense boundaries
  • ↳ Route groups & private folders
'use server'
/ 02

React Server Components.

Render on the server, stream HTML, keep the client bundle lean. We use RSC where it earns its place — and never where it doesn't.

  • ↳ Server-default by design
  • ↳ Strategic 'use client' islands
  • ↳ Suspense + streaming UI
  • ↳ Zero waterfalls policy
action()
/ 03

Server Actions.

Mutations as functions, not endpoints. Form submits, optimistic updates, revalidation — all without writing a single API route.

  • ↳ Type-safe mutations
  • ↳ Optimistic UI w/ useOptimistic
  • ↳ Granular cache revalidation
  • ↳ Progressive enhancement
runtime: edge
/ 04

Edge runtime.

Code that runs at the closest POP. Auth checks, A/B routing, geolocation, personalization — at sub-50ms TTFB, globally.

  • ↳ Middleware on every request
  • ↳ Geo & locale-aware rewrites
  • ↳ Edge config & KV state
  • ↳ Vercel · Cloudflare · Netlify
revalidate: 60
/ 05

ISR & caching.

Static where it can be, dynamic where it must be, regenerated on demand. Cache tags, revalidation, stale-while-revalidate — surgical.

  • ↳ On-demand revalidation
  • ↳ Cache tags & granular invalidation
  • ↳ SWR + edge cache headers
  • ↳ Partial Prerendering (PPR)
middleware.ts
/ 06

Middleware & auth.

Every request, before it lands. Auth gating, rewrites, headers, bot defense — composed at the edge in TypeScript.

  • ↳ NextAuth · Clerk · Auth0 · Supabase
  • ↳ RBAC + session forwarding
  • ↳ Rate-limit & bot defense
  • ↳ A/B + feature flags
03 — Rendering

Pick the right
render mode
for the job.

There's no "best" rendering mode. There's the right one for this route, this user, this freshness budget. Drag the dial — watch the page rebuild.

● ACTIVE MODE SSR

↻ drag the handle

Server-side rendering DYNAMIC

Renders fresh HTML on every request. Best for personalized, auth-gated, or rapidly-changing content.

TTFB120ms
LCP1.4s
Cacheno-store
Freshnessreal-time
app/dashboard/page.tsx tsx 
export default async function Page() {
  const user = await getUser()       // per-request
  const data = await fetchData(user, { cache: 'no-store' })
  return <Dashboard user={user} data={data} />
}
REQUEST PATH
04 — Build pipeline

From git push
to global edge
in 47 seconds.

/ 01 · git

Push to branch

main, preview, or PR — every push spawns a deploy.

git push origin feat/edge-mw
/ 02 · build

Turbopack compile

Type-check, route map, RSC graph, bundle split.

next build · 12.4s
/ 03 · ssg

Pre-render static

Static routes generated, RSC payloads cached.

142 routes · 1.8s
/ 04 · edge

Replicate globally

Pushed to 18 edge regions, middleware live.

iad1 · sfo1 · fra1 · sin1 · gru1
/ 05 · live

Promoted to prod

Atomic swap. Roll back in one click.

deploy: ready · 47s total
05 — Architecture

An edge-first
architecture.

Compute lives close to the user. Data lives where it must. Caching mediates between them. Hover any node — see what flows through it.

06 — Pairings

The stack we
pair Next.js with.

Battle-tested combinations. Not a checklist — a set of choices that compose well in production.

/ HOSTING Vercel Edge · Functions · Analytics / HOSTING Cloudflare Workers · Pages · KV · D1 / DATA Prisma Type-safe ORM · migrations / DATA Drizzle SQL-first · edge-friendly / API tRPC End-to-end typesafe RPC / CMS Sanity Structured · live preview / CMS Contentful Headless · enterprise / AUTH NextAuth Sessions · OAuth · creds / AUTH Clerk Hosted · orgs · MFA / PAYMENTS Stripe Subscriptions · webhooks / UI shadcn/ui Radix + Tailwind primitives / STATE Zustand Lean client store
07 — Migrations

Already shipped
on something else?

We've migrated a lot of apps onto Next.js — without freezing the roadmap. Pick your starting point.

FROM

Create React App

A SPA with react-scripts, no SSR, client-side routing, and a slowing build.

    TO · Next.js 15

    App Router · RSC · Edge

      08 — Engagement

      Five weeks to
      shipped — typical.

      / WEEK 01

      Audit & scope

      Codebase walkthrough, stakeholder interviews, success metrics. Out: architecture doc, route map, risk register.

      / WEEK 02

      Foundations

      App Router scaffold, design system wiring, CI/CD, preview environments, telemetry. First deploy lands by Friday.

      / WEEK 03 — 04

      Build

      Routes, RSC components, server actions, integrations. Demo every Friday. Working software, not slides.

      / WEEK 05

      Harden & ship

      Performance budgets, accessibility audit, load tests, rollback drills. Promote to prod with confidence.

      09 — FAQs

      Common questions
      before kickoff.

      For greenfield, App Router. For mature Pages Router apps, we migrate route-by-route — never a freeze. Some apps stay on Pages Router for years; that's fine.

      No. Next.js runs anywhere — Cloudflare Pages, AWS (with adapters or self-hosted Node), Netlify, your own Kubernetes. We pick based on your team's ops posture, not the brand.

      Streaming HTML is still HTML — crawlers see it. We pair structured data, sitemap generation, OG image routes, and Lighthouse budgets in CI. SEO improves, not regresses.

      Yes — with discipline. We treat them like API endpoints: zod validation, auth guards, rate limits, audit logs. Magic disappears once you write the boring stuff.

      Two to four senior engineers, a designer, and a tech lead. No juniors learning on your dime. No ten-person retainer.

      — Ready when you are

      Let's ship
      something fast.

      Tell us the route map. We'll send back an architecture, a timeline, and a fixed bid — usually within 72 hours.

      Start a project → hello@stackinnovations.com