CodesSavvy is a Next.js development agency run as a senior engineering studio. We build production-ready Next.js applications on the App Router with React Server Components, TypeScript, and Vercel deployment. SaaS dashboards, customer portals, internal tools, and AI-powered web apps for startups and businesses in the US, UK, Canada, and Australia. Fixed price. Ships in 4 to 8 weeks.
Next.js Development Agency
for Production Web Apps
We are Next.js specialists — not generalists who happen to know React. App Router, Server Components, edge runtime, RSC streaming. We build Next.js apps that score 95+ on Lighthouse and load in under one second.
We also build multi-tenant SaaS, mobile apps, and AI integrations. This page focuses on our Next.js practice specifically.
The Framework
The 6-Point Next.js Performance Audit
When we inherit a Next.js codebase or build a new one, every project gets run through the same six checkpoints. Each one is a place where most Next.js apps quietly lose performance — and a place we routinely recover 30 to 70 percent of load speed.
Core Web Vitals Baseline
We measure LCP, INP, and CLS against your real production traffic. Most apps we audit start above 2.5 seconds LCP. We bring them under 1.2 seconds — without rewriting the product.
Server vs Client Component Balance
Most Next.js apps marked every component 'use client' out of habit. We refactor to Server Components by default — typically cutting first-load JavaScript by 40 to 60 percent.
Image & Asset Pipeline
next/image with correct sizing, modern formats (AVIF, WebP), and proper priority hints. Most audits we run reveal images that ship 5 to 20 times larger than the rendered size.
Bundle Size & Code Splitting
Route-level code splitting, dynamic imports for heavy components, tree-shaking unused dependencies. Target: first-load JS under 100KB for typical pages.
Edge vs Node Runtime Placement
Route handlers that hit a database stay on Node. Pure transformations and auth checks move to edge runtime — cutting cold start time by 80 percent and TTFB to under 200ms.
Data Fetching Strategy
RSC streaming for data-heavy pages, ISR for content that changes occasionally, client-side fetching reserved for genuinely interactive state. Most apps we inherit do all three wrong.
What We Build with Next.js
Next.js is our default stack for any application with public-facing pages, real production users, or performance demands. The categories below cover roughly 90 percent of the Next.js work we ship.
Multi-Tenant SaaS Dashboards
Customer-facing SaaS with role-based access, usage tracking, Stripe billing, and admin panels. Server Components for fast dashboard loads. Built to scale to thousands of tenants.
Customer & Partner Portals
Self-service portals where users manage accounts, view data, submit requests, and track orders. Reduces support load by 40 to 60 percent.
Internal Tools & Operations Dashboards
CRM systems, inventory management, ops dashboards, and reporting tools. Custom-built to fit your workflow instead of bending your workflow to fit off-the-shelf software.
AI-Powered Web Apps
Next.js apps with embedded AI features — streaming LLM responses via RSC, semantic search, copilots, document intelligence. Pairs with our AI Integration service.
Headless Commerce Frontends
Next.js storefronts backed by Shopify, BigCommerce, or custom commerce APIs. App Router for instant page transitions and SEO-friendly product pages.
Compliance-Ready Applications
HIPAA-compliant healthcare apps, SOC 2 ready fintech tools, GDPR-aware EU products. Audit logging, encrypted data flows, and access controls built in from day one.
Our Performance Standard
The Numbers We Ship Against
Every Next.js app we ship is benchmarked against this table before launch. If we cannot hit these numbers, we do not consider the project ready for production handoff.
Industry averages from HTTP Archive Web Almanac 2025 and Google Core Web Vitals reports.
Our Next.js Stack
We use the same stack on every Next.js project — not because we are inflexible, but because we have shipped enough projects on this stack to know every shortcut, every performance trick, and every gotcha. You benefit from that accumulated knowledge.
Framework & Frontend
- Next.js 14 / 15 (App Router)
- React 19 Server Components
- TypeScript strict mode
- Tailwind CSS + shadcn/ui
- Framer Motion for animations
App Router and Server Components are not optional for new projects in 2026. Pages Router is legacy.
Backend & Data
- Next.js Route Handlers / API Routes
- Prisma ORM with PostgreSQL
- Redis for caching & sessions
- Server Actions for forms
- Edge runtime where it fits
Database queries run in Server Components or Route Handlers — never directly in Client Components.
Infrastructure & Deployment
- Vercel (primary) or AWS
- Preview deployments per PR
- GitHub Actions CI/CD
- Cloudflare R2 / S3 for assets
- Sentry for error tracking
Vercel for most apps. AWS only when you have specific compute or compliance reasons.
Quality & Observability
- Vitest + Playwright for tests
- ESLint strict + Prettier
- Lighthouse CI gates
- Sentry performance traces
- Custom Core Web Vitals dashboards
Lighthouse score is a build gate. We do not ship Next.js apps that score under 95.
Next.js Development by Industry
Next.js is the default stack for these verticals because performance, SEO, and a clean public-facing layer all matter at once. Each industry below has specific patterns we apply.
Next.js Development for SaaS Startups
Multi-tenant SaaS apps where dashboard performance and onboarding speed are the difference between trial-to-paid conversion. Server Components render the dashboard shell instantly while client-side islands handle interactivity.
See our SaaS Development serviceNext.js Development for Healthcare
HIPAA-compliant patient portals, telemedicine platforms, and provider dashboards. Encrypted data flows, audit logging on every action, and session timeouts that match compliance requirements.
Next.js Development for Fintech
Transaction dashboards, real-time data feeds, and SOC 2 ready architectures. Server-side data fetching keeps financial data off the client. Structured logging meets audit requirements.
Next.js for AI-Powered Products
Server Components stream LLM responses cleanly. Edge runtime keeps function-calling latency low. Embedding pipelines run in API routes or background workers without blocking the UI.
See our AI Integration serviceMigrations
Next.js Migration Services
If you are on Create React App, Vite SPA, Gatsby, or Next.js Pages Router, the migration to Next.js App Router is one of the highest-leverage investments you can make. We do it without rewriting your product code from scratch.
3-5 weeks
Most CRA migrations recover 50%+ load time and unlock SEO that was previously impossible.
2-4 weeks
Vite to Next.js is one of the cleaner migrations — shared React patterns, similar tooling philosophy.
4-6 weeks
ISR replaces Gatsby's static build model with on-demand revalidation. Faster builds, fresher content.
3-6 weeks
Incremental migration is possible — App Router and Pages Router can coexist during the transition.
Case Study
Production Next.js We Shipped
DripMap — AI-Powered Location Discovery App ↗
A founder needed a Yelp-style discovery app powered by AI recommendations — and a well-funded competitor was about to launch something similar. An 18-item feature list threatened to push the launch past the window.
We scoped the MVP in week one and cut the feature list from 18 to 6. Built on React and Supabase with Gemini AI powering location-based recommendations. Clean architecture from day one, so the codebase could be handed to an in-house developer post-launch without rework.
Why Founders Pick Us as Their Next.js Development Agency
Next.js Specialists, Not Generalists
Every engineer on the team works in Next.js daily. We know the framework deeply — App Router edge cases, Server Component data fetching patterns, RSC streaming behavior. The gap between a Next.js specialist and a generic React shop shows up in every Lighthouse audit.
Performance Is the Default
We do not build fast Next.js apps and then optimize. Performance is part of the architecture from week one. Lighthouse 95+ is the floor, not the goal. Server-side data fetching where it matters, edge caching, optimized images by default.
Senior Engineers on Every Project
No junior developers. No account managers. The engineers you speak to in the discovery call are the engineers who write your code. Every engineer has 5+ years of production experience on real applications.
Clean Code Your Next Developer Can Read
Every PR goes through code review. We document architecture decisions. When you hand the project to your in-house team, they will not spend three months trying to understand what the previous team built.
Next.js Development — Frequently Asked Questions
Get a Free Next.js Audit
Send us your live Next.js app — staging URL is fine. We send back a written audit covering Core Web Vitals, Server vs Client Component balance, bundle size, and edge runtime opportunities. No sales call required.
Request Your Free Audit