Timur Puzan

Litres - The #1 book reading app in the GooglePlay. Over 10 million of customers.

As a team member - have implemented new features and refactored old code and legacy.

• Server-driven UI integration for subscription service.
• Refactoring of the reader, both PDF and FB2.
• Implemented a mini-player, which gave a 5% increase in retention on the seventh day, as well as an increase in content consumption.
• A wide range of work with analytic services: native and AppsFlyer. Conducted over 10 ab tests.
• Refactoring a big feature - My books. It gave a 7% increase of consumption e-book and gross revenue 2.8%
• Created by my self as a member of the feature team new feature - "Read goal", which allows user to set read goal and spend more time in the app.
• Update gradle plugin from 7 to 8.
• Bug fixing, crash fixing. In current time crash free is 99.5%
• Migration to Result API.
• Work according to OKR, before that there were KPI.
• Conducted more than 20 technical interviews.
• Code Review.

Stack: Java, Kotlin, Kotlin Coroutines, Flow, RxJava2, Retrofit, ORMLite, Glide, Kotest, Mockito, MVVM/ The elm architecture, Koin, Delegate adapter

Banking app. Under NDA

• Creation interface based on UI/UX. Such as a completely customized view for a bank card.
• Integration new features.
• Bug fixing, crash fixing. Crash free on level - 99.8 %
• Onboarding new team members.
• Code review, refactoring

Stack: Kotlin, Kotlin Coroutines, Flow, Dagger 2, Retrofit, Room, Coil, MVVM, Gradle, JUnit, Mockk

Customer: BssGroup

• Developed new features from scratch with MVVM architecture.
• Writing tests.
• Refactoring legacy code from java into kotlin.
• Client-server development.
• Code review, refactoring.

Stack: Java, Kotlin, Live Data, Dagger 2, Retrofit, Room, Glide, MVVM, JUnit, Mockito.