Madrid, Spain · open to senior & staff mobile roles
I build production apps for iOS and Android, and I spend most of my time on the parts that are hard to get right. Performance, animation, architecture. Lately I've been building the agentic tooling that makes teams faster at all of it.
ScrollCrypto wallets, live sports streaming, insurance, dating, running clubs. Always the mobile side, usually the hard part of it.
Performance, motion and agentic tooling inside a decade-old crypto wallet shipping 50-100 commits a day.
Nov 2025 – Jul 2026
Sole engineer and technical co-founder of a marketplace connecting runners with clubs across Spain.
Feb 2025 – Present
The mobile app's technical expert as one of only two developers on the project.
Feb 2023 – Aug 2025
Authored three courses in Meta's official Coursera certificates, now taken by well over 100K engineers.
Aug 2022 – Jan 2023
Founder-side experience. Owning the product, the platform and the release train, not just a ticket queue.
Running marketplace · Spain
A marketplace connecting runners with training sessions and events from local running clubs in Spain. I am the sole engineer and technical co-founder, so the apps, marketing site, backend, infrastructure and the release cycle on both stores are all mine.
Creator marketplace · London
Co-founded and led as CTO. A one-stop shop to arrange photo shoots in London, connecting creators with brands looking to grow their online presence. Zero to live on both stores, with a paid tier inside six months.
Events discovery · Wrocław
A mobile application for leisure seekers to discover unique events and activities in their city with a few taps. My first product built end to end, alongside a full-time engineering job.
Animation, gestures, offline support, native bridges. Problems I hit at work, extracted and maintained in public.
react-native-offline
One of the most popular libraries for managing offline mode in React Native, with redux integration via middleware. ~40K average downloads per month.
react-native-scroll-bottom-sheet
Cross-platform scrollable bottom sheet with virtualisation support and native animations at 60 FPS. Top trending on GitHub, Reddit and Hacker News.
react-native-chatgpt
A React Native wrapper around ChatGPT that handles authentication, streamed responses and conversation state without a backend of your own.
timer-live-activity
Seamless integration of iOS Live Activities into React Native, with two-way communication between the app and the Dynamic Island.
react-native-animated-stopwatch-timer
Stopwatch and timer component that smoothly animates the digit changes, with every layout animation running on the UI thread.
reanimated-collapsible-navbar
Declarative implementation of a collapsible navigation bar with snapping in React Native, built on Reanimated.
Authored for the Meta Front-End Developer and React Native certificates on Coursera, plus 3 conference talks and 3 workshops across Europe.
Coursera / October 2022
Creator of the Advanced React course for the Meta Front-End Developer Professional Certificate in Coursera, with an average rating of 4.7 ⭐ and 65K+ students enrolled. The course examines different types of React components, its various characteristics and when to use them, custom hooks, building forms with React, component composition, Higher Order Components, Render Props, data fetching, external libraries and testing techniques.
View courseCoursera / December 2022
Co-creator of Working With Data course for the Meta Front-End Developer Professional Certificate in Coursera, with an average rating of 4.9 ⭐ and 5K+ students enrolled. This course will prepare you to make more informed decisions about how you access, store, retrieve and present data within your React Native applications.
View courseCoursera / January 2023
Creator of the Capstone course for the Meta Front-End Developer Professional Certificate in Coursera, enabling students to solve an authentic real-world problem using the skills they learned in the program. It averages 4.8 ⭐ and has more than 4K students enrolled. The course Capstone project will test your knowledge and understanding in mobile development using React Native.
View courseMy long-form work is published at React Native University, the educational site I run.
Design systems
A minimalistic Stack component that sets the foundation for doing layout well, and the one rule that makes a design system far easier to live with: spacing belongs to the parent.
iOS / Live Activities
Incorporate buttons into Live Activities for a new level of control. Syncing timers between JavaScript and Swift, native pause controls, and two-way communication with the app.
iOS / Live Activities
Bridge Live Activities into your React Native app with a custom native module. Native module setup, the SwiftUI interface and the JavaScript integration behind a Dynamic Island timer.
Get in touch
Whether you are hiring, stuck on something gnarly, or just want to talk shop about React Native, my inbox is open. I reply to everything.
