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Oleh Romenskyi

@olehromenskyi

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Senior Android Engineer at Umico, where I improved UI rendering performance by 20% and reduced memory usage by 15%.

Poland

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At Umico, I integrate AI-assisted engineering workflows into Android development and build features with Kotlin and Jetpack Compose. I improved UI rendering performance by 20% and reduced memory usage by 15%.

At BetterMe: Health & Fitness Apps, I led development of a BLE-based wearable module. I also helped reduce the application crash rate by 30% through architectural improvements and stability enhancements.

Earlier, I delivered Android solutions at EPAM Systems, redesigned an in-house retail application at GlobalLogic, and delivered 10+ projects at Onix-Systems. I work with modern Android architecture, performance optimization, and AI-assisted development using Claude Code and GitHub Copilot.

Experience

Work history, roles, and key accomplishments

Current

Senior Android Engineer

Current

Umico

Feb 2024 - Present (2 years 7 months)

Integrates AI-assisted engineering workflows into the development lifecycle and designs scalable Android features using Kotlin and Jetpack Compose. Improved UI rendering performance by 20% and reduced memory usage by 15%.

Kotlin Jetpack Compose MVI MVVM Coroutines Kotlin Flow Claude Code GitHub Co Pilot Performance Optimization Code Review Agile Scrum

Senior Android Engineer

BetterMe: Health & Fitness Apps

Jul 2021 - Dec 2023 (2 years 5 months)

Designed and delivered Android features for a leading Health and Fitness application serving millions of users worldwide. Led development of a BLE-based module for wearable devices and reduced crash rate by 30%.

Kotlin Java Jetpack Compose BLE Hardware Integration Architecture Coroutines Kotlin Flow REST Firebase Hilt Koin Unit Testing Code Review

Senior Android Engineer

EPAM Systems

Jun 2019 - Jul 2021 (2 years 1 month)

Delivered Android solutions for multiple enterprise clients across diverse business domains and technical environments. Participated in technical interviews, presales activities, and onboarding initiatives to support engineering team growth.

Kotlin Java Android Architecture Code Review Mentorship Technical Interviews Pre Sales Agile Scrum

Android Engineer

GlobalLogic

Jul 2018 - Jun 2019 (11 months)

Served as the sole Android developer on a small team for an in-house retail project. Redesigned the application and migrated it to a new technical stack, reducing crash rate by 35%.

Kotlin Java Android Architecture Performance Optimization Refactoring

Mobile Developer (Android)

Onix-Systems

Feb 2015 - Jun 2018 (3 years 4 months)

Developed and maintained Android applications of varying complexity across team sizes, building projects from scratch and enhancing existing architectures. Delivered 10+ projects from conception to production.

Kotlin Java Android Architecture Performance Optimization Refactoring