Tolga Erbaş

Develop and maintain critical features for Garanti BBVA Mobile Banking, a digital banking platform serving 50M+ users. Engineer secure Android functionality using Kotlin, Jetpack Compose, Coroutines, Flow, and modular architecture in a regulated banking environment.

Delivered customer-facing Android features for quick-commerce products serving 10M+ users using Kotlin, Java, Jetpack, MVVM, and Clean Architecture. Refactored legacy VIPER flows into MVVM and Clean Architecture, improving separation of concerns, testability, and long-term maintainability.

Enhanced the Marti Mobility Super App, serving 1M+ users, and shipped features across mobility and transportation journeys. Increased crash-free sessions from 98.55% to 99.75%, reducing crash-affected sessions by approximately 83%.

Built and maintained two production Android applications, Karshare and BoyaDyo, using Kotlin, Jetpack, Apollo GraphQL, Retrofit, MVVM, and Clean Architecture. Designed scalable feature modules and reusable UI components, improving consistency and long-term maintainability.

Built client Android applications using Kotlin and Java; integrated Firebase and Google Maps API; supported requirements through release.

Supported the Financial Technology Loyalty Solutions team in an enterprise fintech environment.

BSc in Computer Science and Engineering from Marmara University, completed in 2021.