Case Studies

Results that speak for themselves.

Detailed breakdowns of past engagements — the problems, the approach, and the measurable outcomes. Most engagements arrived through fractional CTO or Android development work; the cases below show what shipped.

Journey Rewards

Journey Rewards — Stepping In Mid-Flight

Joined as Head of Mobile to take over a cross-platform rewards app from the previous external team. Led 7 contractors across Android and iOS, built internal management from scratch, and gradually handed autonomy back to the engineers while delivering features on both platforms.

AndroidiOSKMMKotlinJetpack ComposeLeadershipCross-Platform

HBO (WarnerMedia)

HBO GO Android — Architecture Modernisation & Performance

Led architecture modernisation and Kotlin migration for HBO GO's Android app, serving 10M+ users across Central and Eastern Europe. Reduced crash rate by 40%, improved UI smoothness from 45 to 58 fps average, and cut build times by 35%.

AndroidKotlinMVVMPerformanceArchitecture

40%

Crash rate reduction

45 → 58 fps

UI frame rate improvement

Yahoo (Verizon Media)

Yahoo Daily Fantasy — Android Architecture Refactor

Contributed to the Yahoo Daily Fantasy Sports Android app as an engineer focused on architectural improvements — migrating legacy patterns to MVVM to make the codebase easier to extend and test.

AndroidKotlinMVVMArchitecture

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