Open to opportunities

Yaromyr Oleksyshyn

@yaromyroleksyshyn

Message

Senior iOS Engineer delivering high-impact features and optimized performance for large-scale apps.

Ukraine

Message

What I'm looking for

I’m looking for a senior iOS role where I can lead complex architecture, deliver high-impact features, and continuously optimize performance and user experience in a scalable product environment.

I’m a Senior iOS Engineer focused on shipping high-impact product features while optimizing key areas of the codebase to enhance user experience and maintain seamless app performance. At SVITLASYSTEMS, I rejoined a project I previously contributed to and now oversee core feature development for an app with over 1.2 million active weekly users.

I also served as a Senior iOS Developer at VIBER RAKUTEN, INC., where I was responsible for iOS SDK development that serves advertisements to more than 1.3 billion users—supporting significant company revenue growth. I integrated new advertising providers, and designed architectural solutions for fundamental operations while tackling intricate optimization challenges.

Previously at SVITLASYSTEMS (United States, Remote), I helped deliver regular quarterly app releases for an app with over 930k+ active users per week. I represented the iOS team in annual Hackathons and contributed to features that led to a 1st-place victory, and I resolved critical deep-links issues that drove a 15% increase in daily active users.

Earlier roles strengthened my engineering fundamentals and delivery mindset: I contributed to robust architectures, mentored developers, gathered and relayed requirements, and improved integrations like CarPlay and Ford auto. From Swift migrations to Bluetooth Low Energy testing and pixel-perfect UI with business logic, I consistently focus on reliable execution, clean architecture, and measurable user outcomes.

Experience

Work history, roles, and key accomplishments

Current

Senior iOS Engineer

Current

Svitla Systems

Sep 2024 - Present (1 year 9 months)

Rejoined the project as a Senior iOS Engineer, overseeing core feature development for an app with 1.2M+ active weekly users. Optimized critical parts of the codebase and led complex architectural work to improve core functionality and app performance.

Swift SwiftUI UIKit IOS Architectures Performance Optimization Debugging

Senior iOS Developer

Viber Rakuten, Inc.

Oct 2023 - Sep 2024 (11 months)

Built and owned iOS SDK development for ads delivered to 1.3B+ users, contributing to revenue growth. Integrated new advertising providers and designed architectural solutions for core operations and performance optimization.

Swift IOS SDK IOS Architectures Performance Optimization Debugging Design Patterns

Senior iOS Developer

Svitla Systems

Jun 2021 - Oct 2023 (2 years 4 months)

Delivered quarterly iOS app releases for a product with 930K+ active users per week and represented the iOS team in annual hackathons. Resolved deep-linking issues, improving daily active users by 15%, and shipped multiple high-priority features.

Swift SwiftUI UIKit Deep Linking IOS Release Engineering Performance Optimization Unit Testing

iOS Developer

GlobalLogic

Mar 2019 - Jun 2021 (2 years 3 months)

Developed core application functionality and architecture to enable 9 iOS team members to build efficiently. Mentored 4 developers, stabilized CarPlay/Ford integration for a Top 10 App Store music app, and helped speed up development by 15% through technical knowledge sharing.

Swift Requirements Gathering Mentorship Code Quality Design Patterns

iOS Developer

Scopic Software

Sep 2018 - Feb 2019 (5 months)

Implemented unit test coverage for 80% of a Bluetooth Low Energy interaction library. Gathered requirements from a client, delivered order flows 20% faster, and helped build scalable, pixel-perfect UI and business logic in a 4-developer project.

Swift Bluetooth Low Energy Unit Testing XCTest Pixel Perfect UI Business Logic Implementation Git

iOS Developer

Vakoms

Sep 2017 - Sep 2018 (1 year)

Migrated an iOS app from Swift 2.2 to Swift 4.0, fixing 2000+ errors and warnings. Built a proof of concept that led to project acquisition and created 300+ dialog windows for a HIPAA-compliant medical clinics application.

Swift UIKit Requirements Analysis Proof of Concept Code Refactoring Debugging

iOS Developer

Uniqatech

Feb 2017 - Sep 2017 (7 months)

Fixed 100+ bugs to improve user experience and completed projects up to 30% ahead of schedule through sustained delivery focus. Implemented pixel-perfect UI and geolocation-based business logic for an application delivered 3 months early.

Swift Geolocation Pixel Perfect UI UI Business Logic Engineering Performance Tuning