Martín Zangl

Senior Android Engineer, 13+ years. At Swift Medical I took crash-free users from 70% to 99.6% in Crashlytics on an offline-first clinical app, by rebuilding how it synchronized rather than by chasing individual crashes. I work mainly in Kotlin, Jetpack Compose and Coroutines. The work I am best at is the production failure that looks like a bug and turns out to be a design problem: data that never syncs, or memory that degrades over a long session until the app dies. The roles below carry the detail. Two things run through them. I end up owning delivery as well as the code, and the tooling I build for other engineers gets picked up and used. Payment SDKs at Checkout.com, Savings and Credits at PayPal, virtual credit card at Mercado Libre. Android is the core — I cross into iOS, Flutter, React Native or the Java services behind a feature when that is what the work needs. I have worked remotely or hybrid since 2020: Swift Medical and PayPal fully remote, Mercado Libre hybrid. My contract at Checkout.com completed in July 2026, so I am available immediately. Valencia, EU citizen, open to roles in Spain and remote-first European teams.