Tomasz Wojcik

Tomasz is a Krakow-based iOS engineer with 11 years of Swift experience. He spent four years at Revolut on the Wealth team, where he rewrote the trading charts in SwiftUI and shaved 40% off cold-start time by lazy-loading the analytics SDK. Before Revolut he was at Allegro, Poland's largest e-commerce platform, on the Seller Center iOS team. His specialty is iOS performance work: Instruments deep-dives, memory-graph debugging, and figuring out why your scroll view drops frames only on iPhone SE 2nd-gen. He has contributed patches to swift-syntax and writes a quarterly newsletter for iOS engineers that covers under-discussed APIs like BackgroundTasks and NSFileCoordinator. Tomasz holds the iOS App Development with Swift certification from Apple and occasionally runs paid workshops on Swift concurrency for in-house engineering teams in Europe.