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Artsiom Mudrak

@artsiommudrak

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Senior Android Developer who cut live trading chart latency by 40% for a finance app serving 50K+ active users.

Poland

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At PLAYSDEV, I worked on a finance application where I delivered broker trading, lending, and insurance features, including a dividend calendar and real-time market charts used by 50K+ active users. I optimized WebSocket data delivery, reducing chart latency by 40%, and added 240 tests to help increase coverage by 29%.

At H2B Group, I delivered a loyalty program and personalized shopping calendar for Homla, contributing to higher repeat purchases and promotional conversion. Earlier, I worked on courier features for InDrive. Rides with fair fares and several Android applications at PLAYSDEV, spanning finance, social networking, navigation, and video.

Experience

Work history, roles, and key accomplishments

Senior Android Developer

PLAYSDEV

Mar 2026 - Aug 2026 (5 months)

Directed development of key broker trading, lending, and insurance features, including a dividend calendar and real-time market/price charts used by 50K+ active users. Refactored UIKit module, optimized WebSocket data delivery, streamlined Gradle configuration, and coached 3 middle developers.

Kotlin MVVM MVI Coroutines Flow Koin Junit Espresso Compose Navigation WebSockets Gradle Clean Architecture

Senior Android Developer

H2B Group

Sep 2025 - Mar 2026 (6 months)

Designed and delivered a loyalty program system with personalized discounts and promotional mechanics, contributing to a 20% increase in repeat purchases. Rolled out an event-based shopping calendar, driving a 15% growth in conversion for promotional campaigns.

Android Developer

Andersen

Nov 2024 - Sep 2025 (10 months)

Architected and delivered innovative courier flow features, seamlessly integrating with existing modules. Spearheaded feature integration across distributed codebases, resulting in a 50% increase in courier onboarding conversion rates.

Android Developer

PLAYSDEV

Feb 2021 - Nov 2024 (3 years 9 months)

Developed multiple Android applications including a finance application, social network, advertisement SDK, indoor navigation, crypto widgets, video games application, and bet tips application. Utilized various tech stacks and architectures to deliver user-focused features.