Senior Mobile Developer · iOS first · Warsaw, remote
I build mobile apps that ship
Native iOS first, plus Android when the product needs it. I've built apps from scratch as the sole developer, and delivered key features in startup, scale-up and enterprise teams across large, multinational environments
Selected client projects
Apps for two of Europe's largest banks, used by millions of customers
A top-3 yoga app with tens of millions of downloads
The match-day app for staff at Europe's biggest football tournaments
3+ betting apps, with live scores and odds, identity checks and payments built in
A government-approved ID wallet, accepted wherever a physical document would be
An app that runs building projects from a phone, down to plans the crew can mark up on site
A tracking app for delivery drivers and the orders they carry
An app that manages a company's mail, documents and orders
A Chinese-learning app: a 125,000-word dictionary, stroke-by-stroke writing practice checked as you write, and flashcards built on the new HSK 3.0 word lists.
It runs on a freemium model I designed and built: free-tier limits tuned remotely without a release, a paywall with a free trial, and monthly, yearly and lifetime plans through RevenueCat.
Designed and built on my own — native iOS (Swift, SwiftUI) and native Android (Kotlin, Compose), analytics and the website.
hanzee.appHave a mobile app to build, rescue or grow? Write to me