Volodymyr Kosynets

Development of an offline-first enterprise-grade facility management mobile application used by global clients, along with smaller satellite applications. Led the transition from Views/Fragments, AsyncTasks, and massive singletons to Jetpack Compose, MVI, and a modular Clean Architecture, combined with a Java-to-Kotlin migration and cross-platform code sharing using Kotlin Multiplatform (KMP), extending to Compose Multiplatform.

• Owned and delivered the largest (~35 distinct screens) greenfield feature in the application end-to-end
• Implemented medium-sized features using Kotlin Multiplatform for both Android and iOS apps
• Optimized application build times in the CI pipeline (dropped median build duration from 52 mins to 32 mins), refactored GitHub Actions workflows to improve reliability
• Automated release branch creation to eliminate mistakes caused by human error
• Migrated several medium-sized features to Clean Architecture
• Resolved numerous production incidents of varying scale, providing RCA and including ongoing communication with stakeholders, both independently and during pair programming sessions
• Reduced ANR occurrences caused by improper refactoring from ~10k per day to 10–30 per day both in foreground and background, unblocking many affected users
• Leveraged Datadog analytics to investigate production incidents and support data-informed feature decisions
• Onboarded new engineers following the acquisition of Corrigo Inc., contributing to a 10-developer distributed platform team (EU, Asia)
• Designed and implemented multiple complex features end-to-end, including a modular dashboard with dynamic widgets and user-configurable state synchronized across devices via backend services.

Development of an offline-first enterprise-grade facility management mobile application within a team of three engineers per mobile platform and approximately 100 people overall.

• Delivered numerous features for work order and facility management workflows, including GPS location tracking and actions geofencing, NFC tag scanning, QR code scanning with ZXing, a local encrypted data storage for attachments and content providers for secure data access
• Maintained and refactored legacy components, performed API level migrations, improved application stability, and investigated production incidents
• Collaborated closely with backend teams on API design and with product teams on UX and feature design in an agile environment
• Evolved the mobile architecture over the long term, supporting Android versions (2.x and above) prior to company acquisition.

• Volunteered to transition from LAMP stack to Android Java development
• Contributed to early versions of Corrigo mobile applications for Android

As a full-stack software engineer specializing on LAMP stack developed MVP for SaaS platforms for medical and driving school domains.

End-to-end development of a real estate platform for commercial real estate market.

End-to-end development of a custom Windows-based hosting control panel (cPanel-like system) in a team of 2 developers.

Led a team of 10 developers producing frontend applications for a PSD-to-XHTML conversion service and contributed to short term PHP and JavaScript projects.

Developed and maintained e-commerce websites using in-house CMS solution.