Sofia Kowalczyk

Sofia is a mobile platform engineer with seven years of React Native experience, focused on developer tooling and CI/CD for mobile teams. She spent three years at Shopify on the Point of Sale app, where she helped move the team off Bitrise onto a custom EAS Build setup and wrote much of the internal testing harness for Detox flake reduction. Before Shopify she was at a Berlin-based scooter startup where she was the second mobile hire and shipped the first RN version of the rider app to roughly 40 cities. She runs a small consultancy now, mostly helping Series A and B startups untangle their Fastlane lanes and set up over-the-air update strategies that don't violate App Store guidelines. Her writing leans toward the unglamorous middle of the stack: provisioning profiles, monorepo setups with Nx, and why your bundle size keeps creeping up.