DesignKompanie

Next.js development company

Next.js engineering, architected for speed.

We build modern, scalable web applications with Next.js 15 and React Server Components. Sub-second page loads, zero client-side waterfalls, and clean enterprise TypeScript architectures.

Next.js 15React 19TypeScriptTailwind CSSVercelPostgreSQL
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Next.js 15 development code and architecture

N° 01Server-first architecture

App Router & React 19. Zero waterfall latency

Traditional single-page React apps ship megabytes of JavaScript to the browser, resulting in sluggish mobile rendering, layout shift, and poor search engine crawl efficiency. Next.js 15 App Router fundamentally inverts this paradigm.

We architect systems using React Server Components (RSC) where data fetching happens directly on the server next to the database. The client only downloads lightweight, interactive islands of state. Zero client-side waterfalls, instant First Contentful Paint, and perfect 100/100 Core Web Vitals scores.

N° 02Edge data & caching

Sub-50ms data mutations. Global edge delivery

01

Server Actions & Optimistic UI

Mutate database records securely without boilerplate REST endpoints. Immediate optimistic updates give users a native desktop feel even on weak cellular networks.

02

Granular Cache Tagging

Precision cache invalidation via revalidateTag and revalidatePath. Content updates propagate instantly across the globe without busting stale cache for unaffected pages.

03

Streaming with Suspense

Never block page rendering on slow third-party APIs. Fast shell loads immediately while heavy analytics and background queries stream in progressively.

04

Dynamic Image Optimization

Automatic AVIF and WebP generation on demand, responsive sizing, and zero cumulative layout shift (CLS) for visual fidelity across all screen sizes.

N° 03Type safety & reliability

End-to-end TypeScript. Compile-time guarantees

We enforce strict end-to-end type safety from the PostgreSQL database column definitions through to the React UI component props. If a database schema changes, the TypeScript compiler catches regressions immediately.

Automated unit testing with Vitest and browser integration testing with Playwright run in CI on every push, ensuring your application deploys with complete confidence.

N° 04Search & metadata engine

Programmatic SEO. Architected to rank

Next.js is the gold standard for web applications that need search engine authority. We build dynamic OpenGraph image generation, automated XML sitemaps, JSON-LD Schema graphs, and canonical link trees directly into the metadata lifecycle.

Whether you are scaling thousands of programmatic landing pages or building a content-rich knowledge hub, Google and AI answer engines ingest your site with flawless semantic precision.

Selected work

Shipped, not theorised.

Hauloport Next.js admin dashboard showing live logistics data
Hauloport multi-carrier shipping interface
Hauloport Next.js marketing site

01

Hauloport

Logistics · multi-tenant SaaS

A high-performance Next.js 15 web platform and multi-tenant portal for North American freight logistics. Role-aware dashboards for shippers, carriers, drivers, and administrators with real-time rate comparison and digital bills of lading.

Engineered with React Server Components, server actions, PostgreSQL row-level security, and BullMQ background processing on a sub-50ms edge infrastructure.

What we built

  • Next.js 15 App Router with granular streaming Suspense boundaries
  • Strict end-to-end TypeScript and Prisma ORM data modeling
  • Dynamic PDF rendering for shipping labels and customs documentation
  • Stripe Connect custom payout engine with double-entry accounting ledger
  • 100/100 Core Web Vitals across mobile and desktop viewports
Next.js 15React 19TypeScriptPostgreSQLPrismaStripeAuth.jsTailwind CSSVercel
Visit hauloport.comOpen the product demo
AdmitPortfolio Next.js application
AdmitPortfolio multi-role authentication demo

02

AdmitPortfolio

EdTech · white-label agency platform

A Next.js 15 admissions mentoring platform engineered for international education agencies. Features three isolated authenticated environments (admin, counselor, student) with dynamic subdomain routing and white-label branding.

Delivers server-rendered public portfolio pages with sub-second TTFB, custom privacy gating, and granular file evidence uploads.

What we built

  • Next.js 15 App Router with multi-tenant custom domain routing
  • Server-enforced role access control across 13 portfolio modules
  • Instant optimistic feedback on student essay draft submissions
  • Edge-cached public candidate profiles with zero hydration mismatch
Visit admitportfolio.comOpen the live demo

Investment

Fixed scope. No drift.

From $18,000 — Next.js architecture & full-stack build.

  • Next.js 15 App Router architecture with React Server Components
  • Strict end-to-end TypeScript typing and clean modular code
  • Responsive Tailwind CSS UI components with high accessibility (a11y)
  • Server Actions & optimistic UI state handling
  • Automated Core Web Vitals optimization (100/100 target)
  • Automated XML sitemaps, OpenGraph image generation, and JSON-LD schema
  • Production deployment pipeline on Vercel or AWS
  • 30-day post-launch defect warranty
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Questions

The answers we give most often.

Why choose Next.js 15 over legacy React or Vue SPAs?
Next.js 15 combines the developer ergonomics of React with server-side rendering, streaming, and edge caching. It eliminates client-side bundle bloat, delivers unbeatable search engine indexability, and provides sub-second page loads that directly lift conversion rates.
Can you migrate our existing React or WordPress site to Next.js?
Yes. We frequently migrate legacy React client-only apps (Create React App, Vite SPAs) or slow WordPress setups into high-performance Next.js 15 platforms. We preserve your existing URLs, canonical structures, and SEO equity while radically improving performance.
Do you build custom web apps or just marketing websites in Next.js?
Both. We specialize in complex, authenticated full-stack applications: multi-tenant SaaS dashboards, custom portals, marketplace platforms, and high-conversion marketing engines.
What hosting environment do you recommend for Next.js?
Vercel is the native platform for Next.js, offering instant preview deployments, global edge middleware, and zero-configuration serverless scaling. We also deploy Next.js in containerized Docker environments on AWS ECS, GCP Cloud Run, or Railway when compliance requires private VPC infrastructure.
How much does a Next.js development project cost?
Custom Next.js engineering engagements start at $18,000 for high-performance marketing engines or web app modules. Full-scale SaaS applications with authentication, billing, and admin consoles start at $28,000.
How long does delivery take?
Focused Next.js web applications or migration sprints typically take 4 to 8 weeks. Full v1 SaaS builds run 8 to 12 weeks.

Start here

Tell us about your Next.js project.

Whether you need a new web application built from scratch or an existing React/WordPress stack migrated to Next.js 15, we'll review your requirements and provide a detailed technical architecture proposal.

Or email hello@designkompanie.com

Reply within two business days.

Related services

SaaS developmentMVP development servicesAI application developmentWeb app development

Next step

Build your next application on Next.js 15.

Send us your requirements or Figma design. We'll respond with a scope, fixed quote, and delivery date.

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Next.js Development Company: App Router & RSC