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Viachaslau Holikau

@viachaslauholikau

Senior iOS Engineer at Self-Employed building iOS applications end to end, from architecture and StoreKit monetization to App Store release.

Belarus

Message

At Self-Employed, I own the development of my iOS applications from product architecture and feature design through implementation, StoreKit monetization, and App Store publication. I also maintain and evolve the applications after release.

At ITREX Group, I developed production features across social networking, healthtech, and gaming, including Stories functionality and subscription upsell flows. I introduced Swift Concurrency on a production project and took on technical leadership responsibilities, coordinating two iOS Engineers and mentoring a Junior iOS Engineer.

Experience

Work history, roles, and key accomplishments

Current

Senior iOS Engineer

Current

Self-Employed

Jan 2026 - Present (8 months)

Own the end-to-end development of iOS applications, including product architecture, feature design, UI/UX, implementation, monetization, release preparation, App Store publication, ongoing maintenance, and product evolution.

Swift UIKit Swift Concurrency StoreKit 2 PencilKit GitHub Co Pilot Git Notion Figma XCode

Senior iOS Engineer

ITREX Group

Nov 2020 - Dec 2025 (5 years 1 month)

Developed new and core product features, custom views, animations, backend-driven UI, and multimedia functionality. Took on iOS technical leadership responsibilities, coordinated two iOS Engineers, and mentored a Junior iOS Engineer.

iOS Engineer

Self-Employed

Aug 2020 - Oct 2020 (2 months)

Independently designed the application architecture and UI and implemented product features from concept to production. Handled debugging, refactoring, ongoing application maintenance, and App Store release.

Swift UIKit Cocoapods Git Trello XCode

iOS Engineer

NEKLO LLC

Aug 2018 - Jul 2020 (1 year 11 months)

Developed and maintained production features, including dark mode, networking, persistence, StoreKit functionality, and accessibility improvements using Dynamic Type. Migrated functionality from Objective-C to Swift and wrote XCTest unit tests.