Doświadczenie zawodowe:
I am a Middle Android / Mobile Software Engineer with 3.5+ years of commercial experience in mobile development. I started my career at Effective Mobile, where I worked as an Android Developer from February 2023 to February 2024, developing applications with Kotlin, Jetpack Compose, Coroutines, Flow, Retrofit, Room, MVVM, and Clean Architecture. I worked with maps, geolocation, routing, recommendation systems, UI optimization, and legacy code refactoring. From February 2024 to January 2026, I worked at Rendez-vous as an Android Developer on a large enterprise application using Kotlin, Jetpack Compose, Coroutines and Flow, Room, gRPC, Ktor, MVI, Clean Architecture, multi-module architecture, and KMP. I developed new features and reusable UI components, worked with network and database layers, fixed critical bugs, refactored legacy Java/XML code, participated in Code Reviews, CI/CD, and KMP migration. I also focused on performance optimization, improving camera and barcode scanner performance by around 30%, reducing unnecessary UI recompositions by 45–50%, and creating reusable components that reduced typical screen development time by 20–25%. Since January 2026, I have been working at Huawei as a Mobile Software Developer, developing applications and Atomic Services for HarmonyOS NEXT. My responsibilities include requirements analysis, architecture design, implementation, API and SDK integration, Code Review, CI/CD, technical documentation, and AppGallery releases. I also collaborate with international R&D teams and support partner developers, and I have successfully delivered 4+ Atomic Services for major partner companies to production. Overall, my experience covers modern Android development, mobile architecture, networking, databases, asynchronous programming, performance optimization, legacy modernization, CI/CD, Code Review, KMP, and HarmonyOS NEXT.
Umiejętności zawodowe i inne:
Multi-module Architecture, MVI, MVVM, KMP, XML, Java, CI/CD, Git, Jira, Confluence
Kotlin
Coroutines
Flow
Jetpack Compose
Android SDK
Gradle
Ktor
Retrofit
gRPC
Room
SQLite
Hilt
Dagger 2
Koin
Clean Architecture
Dodatkowo:
Android developer with over 3 years’ experience in commercial development. I am familiar with and actively use Kotlin for development. I have experience working in a distributed international team. I keep up to date with developments in the Android and Harmony OS Next ecosystems. What I value most in my work is the team I work with.
Telegram: https://t.me/JJagoR
