React & Next.js agency for production-ready web and mobile apps
You need a team that runs React and Next.js in production every day, not one still reading the docs. Olio builds fast, scalable applications with Server Components, the App Router, and a clean TypeScript architecture - from prototype to launch in 4 to 12 weeks. Boutique agency based in Mönchengladbach, working remotely across Germany, Austria, Switzerland, and the wider EU.
What we build with React and Next.js
We build web apps, SaaS products, dashboards, and customer portals with Next.js and React - and the same codebase extends into native iOS and Android apps through React Native. Server Components and the App Router keep bundles small, while SSR and ISR give you fast first loads and strong rankings. PostgreSQL handles the data layer; Tailwind CSS and shadcn/ui keep the interface consistent and maintainable.
How we work
We build what matters first - the features your product depends on. Every week you get a working demo, a clear view of progress, and no surprises. Performance budgets, end-to-end type safety, and automated tests are part of the process, not a cleanup phase at the end. At handoff you get documented, maintainable code that your team or ours can carry forward.
The tech stack
TypeScript from the database to the frontend, Next.js with the App Router and React Server Components, React for interactive UI, and React Native for mobile. Tailwind CSS and shadcn/ui power the design system, with PostgreSQL as the data layer. Deployment and hosting run on Docker and Kubernetes, EU-sovereign on Hetzner, GCP EU regions, or AWS Frankfurt - with no vendor lock-in.
Why Olio
You work directly with senior engineers, not a layer of project managers relaying messages. As a boutique agency we take on few projects at a time and go deep on each: clean code, real testing, and a clear architecture. Instead of an expensive senior hire, you get a team that ships production-ready work - transparently, and built for long-term maintainability.
What you get
- A production-ready React and Next.js app in 4 to 12 weeks, not a year
- Fast load times from Server Components, SSR/ISR, and defined performance budgets
- One codebase for web and mobile - Next.js plus React Native, with React at the core
- End-to-end type safety with TypeScript and automated tests from day one
- EU-sovereign, GDPR-compliant hosting on Hetzner, GCP EU, or AWS Frankfurt - no vendor lock-in
- Weekly demos and documented, maintainable code for a clean handoff
Core Technologies
Let's build your app
Frequently asked questions
How much does a React and Next.js app cost?
A simple MVP runs between €25,000 and €40,000. A full SaaS MVP with AI features ranges from €50,000 to €120,000. After a free consultation you get a transparent estimate for your specific scope.
How long does the build take?
Simple apps are production-ready in 4 to 6 weeks. Larger SaaS products with auth, payments, dashboards, and a mobile app typically take 8 to 12 weeks. You see a working demo every week.
What does working with you look like?
We start lean with the core features, ship a working version each week, and adjust scope together. You work directly with the senior engineers who write the code - no middle layer and no surprises.
Which technologies do you use?
TypeScript, Next.js with the App Router and Server Components, React and React Native, Tailwind CSS, and PostgreSQL. For deployment we use Docker and Kubernetes on Hetzner, GCP, or AWS.
Do you host in the EU under GDPR?
Yes. We host EU-sovereign on Hetzner, in GCP EU regions, or in AWS Frankfurt - GDPR-compliant and without vendor lock-in. You keep full control over your code and infrastructure.
Let's Talk
