Open to opportunities

Oleh Bysaha

@olehbysaha

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Senior software engineer specializing in mobile and frontend systems, delivering scalable, user-focused apps.

Poland

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What I'm looking for

I’m seeking a senior mobile/frontend engineering role where I can own product initiatives, ship production apps, mentor teams, and build scalable end-to-end solutions.

I am a Senior Software Engineer with 10+ years of experience building mobile and web products, owning end-to-end mobile initiatives, and improving performance and reliability across platforms. I ship production iOS/Android apps, design architectures, integrate backend services (push, auth, deep links), and set up CI/CD and release operations.

I’ve led frontend teams, contributed to product decisions, and delivered measurable impact—apps with high App Store ratings, strong retention, crash-free releases, and reduced operational costs. I continuously expand backend expertise to create comprehensive, scalable solutions and mentor hiring processes and technical growth.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Venue.ink

Feb 2025 - Jun 2025 (4 months)

Owned and delivered the mobile initiative, shipping production iOS/Android apps in under 4 months and driving >50% adoption among active artists; integrated push, deep links, auth flows, web/BE parity endpoints, and CI/CD to reduce messaging costs by shifting SMS to push notifications.

TypeScript React Native Firebase APNS tRPC PostgreSQL CI CD

Senior Software Engineer

Moneyworld

Sep 2021 - Aug 2024 (2 years 11 months)

Led frontend development of a gamified savings app achieving a 4.3 App Store rating, 99.97% crash-free releases, and high engagement (users visiting up to 25x/day) while reducing CAC to $40.

React Native Expo TypeScript NodeJS PostgreSQL AWS Real Time Systems

Senior Software Engineer

ITMAGINATION

Nov 2020 - May 2021 (6 months)

Built the eCredits cryptocurrency wallet mobile app from scratch, improving blockchain sync and app readiness by ~60% and adding secure QR-based transaction features to boost engagement.

React Native TypeScript Cryptography

Senior Software Engineer

AZinec LLC

May 2019 - Nov 2020 (1 year 6 months)

Led frontend team and internship program while delivering projects that reduced TTI by 30%, halved app launch times, and cut TV memory usage ~35% for video streaming products.

ReactJS React Native TypeScript GraphQL NodeJS Google Cloud Platform AWS HLS Performance Optimization

Software Engineer

AZinec LLC

Jan 2015 - May 2019 (4 years 4 months)

Contributed to multiple white-label and consumer products, improving UI/UX to increase engagement ~15% and reducing page load time by 3 seconds to boost retention and SEO.

ReactJS Cordova TypeScript Reanimated CSS UI UX

Education

Degrees, certifications, and relevant coursework

Uzhhorod National University

Master, Computer Science

2016 - 2018

Completed a Master in Computer Science at Uzhhorod National University, focusing on advanced topics in software development and systems.

Uzhhorod National University

Bachelor, Software Development

2014 - 2016

Completed a Bachelor program in Software Development at Uzhhorod National University with coursework on software engineering and application development.

College at Uzhhorod National University

Junior Specialist, Software Development

2010 - 2014

Completed a Junior Specialist program in Software Development at the college affiliated with Uzhhorod National University, covering foundational programming and systems topics.