Two senior experts building high-performance applications.

We are a technical consultancy duo specializing in modern web development with React and Next.js. No agency overhead. No meetings marathon. Just strategic expertise and clean execution to maximize efficiency.

How we complement each other

As two experts who've worked together for over a decade, we provide complete full-stack development capability. From scalable architecture to pixel-perfect UI. No handoffs, no miscommunication.

Marcel Fetten

Marcel Fetten
Next.js Performance & Architecture Expert

Learn more about Marcel
Stefan Momm

Stefan Momm
Senior Frontend Developer & CSS Expert

Learn more about Stefan

Trusted by Forward-Thinking Companies

  • Coop
  • DHL
  • Engel & Völkers
  • Disney
  • IBM
  • KPMG
  • LEGO
  • Nintendo
  • RTL Group

The Case for JavaScript Directives

Why "use cache", "use workflow", and "use step" are the right approach to infrastructure boundaries in JavaScript. The case for directives over wrapper functions, and why different infrastructure should mean different syntax.

How to Measure Core Web Vitals in Next.js

Next.js has built-in support for reporting Core Web Vitals from real user sessions. How to set up the useReportWebVitals hook and send metrics to your analytics endpoint or Google Analytics.

I Stopped Self-Managing Infrastructure

How a Black Friday flash sale handled 3.2 million requests at 900/sec with a 0% error rate for $18 on Vercel. Why self-managed Kubernetes costs more than the invoice shows, and what actually absorbed the traffic.

Image Optimization in Next.js

How next/image handles format conversion, responsive sizing, lazy loading, and preloading. Why the sizes prop matters more than most teams think, and how browser primitives have changed image optimization.

Building E-Commerce Storefronts with Next.js

What seven years of building enterprise e-commerce storefronts with Next.js taught me about static generation, caching, images, and the patterns that actually matter for performance and revenue.

Core Web Vitals Explained

Core Web Vitals measure real-world user experience: loading speed, interactivity, and visual stability. What each metric means, what the thresholds are, and why TTFB matters too.