Олександр

Oleksandr Oliinyk
iOS Engineer
Kyiv, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

Summary
iOS Engineer with 5+ years building and shipping production apps end-to-end. Strong in Swift, UIKit/SwiftUI,
concurrency, architecture, and API integrations, with experience in large-scale subscription products, technical
leadership, and App Store delivery.

Experience
Capgemini iOS Engineer MAY 2025 - PRESENT
• Reduced runtime by 15% by driving refactoring and tech-debt reduction across a multi-architecture codebase,
improving maintainability and consistency across modules.
• Owned feature delivery end-to-end, from technical scoping and implementation through analytics, release, and
post-launch validation.
• Built and standardized analytics tracking across the iOS app, improving event reliability and providing cleaner
data for A/B testing and product decisions.
• Shipped family-plan functionality for a multi-product subscription platform serving 12M+ subscribers, expanding
the product’s monetization capabilities.

Freelance iOS Engineer JUL 2024 - PRESENT
• Built a production-ready real-time chat app with one-to-one and group messaging using WebSockets, including
delivery states and typing indicators.
• Designed and developed a room-capture and floor-plan app, validating the approach for a larger interior/real-
estate product.
• Delivered 5+ client projects end-to-end, from requirements and estimates through implementation and
TestFlight delivery.

Codble Lead iOS Engineer MAY 2024 - JUN 2025
• Led iOS development for a 3-engineer team, owning architecture, technical direction, feature scoping,
estimation, and delivery planning.
• Partnered with product leadership to shape MVP scope and roadmap priorities, translating business
requirements into actionable technical plans.
• Owned releases from planning through App Store delivery, coordinating engineering priorities across product,
design, and QA.

Accentiko iOS Engineer JUN 2023 - SEP 2024
• Shipped and maintained production UIKit/SwiftUI features end-to-end, from scoping through App Store release,
collaborating with design, backend, and QA while handling ongoing feature development and production fixes.

4K-Soft iOS Engineer JUL 2021 - JUN 2023
• Improved In-App Purchase and push notification flows while collaborating with design and backend teams to
strengthen monetization, engagement, and delivery quality.

Skills
Core iOS Swift, UIKit, SwiftUI, Combine, async/await, GCD
Networking REST APIs, URLSession, WebSockets
Architecture MVVM, Coordinators, Modularization, Dependency Injection
Apple StoreKit, In-App Purchases, APNs, Core Data, Keychain, AVFoundation, RoomPlan
CI/CD Bitrise, Xcode Cloud, App Center, TestFlight, App Store Delivery
Monitoring Firebase, Sentry, Datadog, Analytics Tracking, A/B Testing
Testing XCTest, Mocking, Code Reviews, Linting
Tools Git, GitHub, GitLab, SPM, CocoaPods, Postman

Education Igor Sikorsky Kyiv Polytechnic Institute · BSc in Information Systems and Technologies · 2021–2025