We build digital products, from idea to production
ZubiLabs is a software engineering studio led by a senior engineer. We design, build and ship mobile apps, backends and MVPs for startups and companies that need someone to own the technical side.
- React Native
- Node.js
- .NET
- PostgreSQL
- Shipped to App Store & Google Play
- 9+ years shipping software
- Tech lead experience
- Products live on iOS & Android
- Based in Azpeitia, working worldwide
Story256
A collaborative storytelling app, built from concept to App Store.
Product, design, React Native app, backend, subscriptions, analytics and launch. Everything, by ZubiLabs.
Read the case study →
Client work
Most of our client work is under NDA. We are happy to walk you through it on a call.
What we do
Six ways to work with ZubiLabs. All of them end with something in production.
- 01
Product development
A complete digital product, from the first conversation to real users. Product definition, architecture, mobile or web app, backend, launch and iteration. One engineer owns the whole thing.
For founders and companies launching something new.
- 02
Mobile apps
iOS and Android apps built with React Native and Expo, from architecture to App Store. Offline, payments, push, auth and everything a real app needs to live in production.
For startups and companies whose product lives on the phone.
- 03
MVP development
A working product in weeks, not months. We cut scope to what proves the idea, build it properly and ship it to real users. When it works, it grows instead of getting rewritten.
For founders who need to validate, raise or launch.
- 04
Backend & APIs
The part users never see and everything depends on. APIs, databases, authentication, third-party integrations and cloud infrastructure, designed to be maintained by whoever comes next.
For products that need a solid foundation, or a new one.
- 05
Architecture & technical leadership
Senior technical decisions without a full-time hire. Architecture, stack, roadmap, code reviews and mentoring for teams that need a tech lead in the room.
For teams without a CTO, or with one who needs a hand.
- 06
Product rescue
Inherited an app that nobody can maintain? We audit it, stabilise it and get it moving again. Then we plan where it goes next.
For companies with an existing product that is stuck.
How we work
Five steps. No fifteen-step methodology, no slides about synergy.
- 01
Understand
We start with your business, not your feature list. What the product has to achieve, for whom, and what would make it fail.
- 02
Define
Scope, architecture and a plan you can read. What gets built first, what waits, and why.
- 03
Build
Working software every week. You see progress, you test it, you change your mind early instead of late.
- 04
Ship
App Store, Google Play, production infrastructure, monitoring. Launch is part of the job, not an extra.
- 05
Evolve
Measure, learn, improve. Products are never finished. We stay as long as you need us.
- Direct access. You talk to the engineer building your product. Every time.
- Weekly demos. Working software, not status reports.
- No surprises. Scope, timeline and cost defined before we start. Changes are discussed, not discovered.
Jon Zubizarreta
Founder & Software EngineerI'm a software engineer with [X] years building digital products, most recently as a tech lead. I've spent those years on both sides of the stack: mobile apps with React Native, backends with Node.js and .NET, databases, integrations and the unglamorous work of getting things into production.
I started ZubiLabs to work directly with founders and companies who need someone to own the technical side of a product, not just write parts of it. Story256, our own app, is the proof of what that looks like.
What we build with
We pick the stack that fits the product, not the other way around. This is what we use most.
- React Native
- Expo / EAS
- TypeScript
- Swift / Kotlin*
- Node.js
- .NET / C#
- TypeScript
- REST / GraphQL
- PostgreSQL
- SQL Server
- MongoDB
- MySQL
- Vercel
- AWS / Azure
- GitHub Actions
- Sentry
- RevenueCat
- Stripe
* when native modules are needed
Have a product to build?
Tell us what you want to make. We reply within one working day, and the first call is with the engineer, not a salesperson.
hello@zubilabs.devOr book a 30-minute call →- Based in Azpeitia
- Working with clients in Europe and the US