Olha Bereziuk

is available. ✅

Selbstständig, iOS Developer, DateSense
Leipzig, Germany

Fähigkeiten und Kenntnisse

Swift
SwiftUI
iOS
UIKit
Google Firebase
StoreKit
Swift Package Manager
MVVM
MVVM-C
Git
TestFlight
App Store Connect
Swift Concurrency
Firebase Analytics
SwiftData
Core Data
REST APIs
UIKit to SwiftUI Migration
App Store Release
Production Applications
Dependency Injection

Werdegang

Berufserfahrung von Olha Bereziuk

  • Current 10 months, since Sep 2025

    iOS Developer

    DateSense

    • Built and released an iOS app on the App Store using SwiftUI and SwiftData • Implemented StoreKit subscriptions and Firebase integrations • Used Swift Concurrency (async/await) in production app flows • Focused on maintainability, App Store delivery, and post-release stability

  • Current 2 years and 5 months, since Feb 2024

    iOS Developer

    Onseo Ltd

    • Continue development and maintenance of an existing production iOS application • Implement new features and support ongoing product improvements in a cross-functional team • Contribute to production releases, bug fixing, and application stability • Collaborate remotely with product managers, backend developers, and designers

  • 1 year and 7 months, Jun 2022 - Dec 2023

    iOS Developer

    Appsfactory GmbH

    • Developed and maintained iOS applications for German media products, including an app with more than 2 million users • Migrated legacy UIKit screens and flows to SwiftUI to improve maintainability and reduce UI complexity • Developed a reusable audio player Swift Package used across multiple iOS projects • Collaborated with backend developers, designers, QA engineers, and product managers • Participated in code reviews and ongoing improvements of the iOS codebase

  • 2 years, Jul 2020 - Jun 2022

    iOS Developer

    Onseo Ltd

    • Worked on a production iOS application for Crown Resorts as part of a commercial development team • Implemented Firebase Analytics to support data-driven product improvements • Redesigned and extended application flows and UI screens based on product requirements • Improved onboarding and registration flows to reduce friction for new users • Maintained and improved the existing iOS codebase through bug fixing and feature delivery

  • 8 years and 4 months, Apr 2012 - Jul 2020

    System Administrator

    EPICENTR group of companies

    • Maintained enterprise infrastructure and internal systems • Supported operational stability and technical maintenance processes

Sprachen

  • Deutsch

    B1-B2 (Gute Kenntnisse)

  • English

    C1 (Fließend)

  • Ukrainisch

    C2 (Verhandlungssicher / Muttersprachlich)

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