Олександр

Oleksandr Oliynyk CV.2026

iOS Engineer Contacts
iOS Engineer with 4+ years of commercial experience building user-facing apps and owning features Telegram
end-to-end to App Store release. Strong in Swift, UIKit/SwiftUI, Combine & async/await, and REST API Gmail
integrations, with experience across multiple architectures, code reviews, and CI/CD to improve stability,
performance, and delivery cadence. L inkedin
[open contact info](look above in the "contact info" section)

Experience Ukraine, Kyiv

Cap emini - iOS Engineer
g May 2025 - e en Pr s t L an ua es
g g

B uilt and shipped features for a large-scale production product, collaborating across multiple teams Ukrainian - Native
and roles to deliver end-to-end from planning to release. English - B2

Worked in a multi-architecture codebase, contributing across modules while maintaining

kills
consistency, and performed refactoring/tech-debt cleanup.
Owned quality workflows through code reviews and active participation in bug triage and fixes. S

Implemented family plan subscription functionality in existing large subscription model.
Swift
Freelance - iOS Engineer Jul 2024 - e en
Pr s t
UIKit / SwiftUI
Combine
B uilt a real-time chat iOS app with and group conversations using WebSockets, supporting
1:1
M M-C / modulization / DI
message delivery states and typing indicators.
VV

XCTest, mocking, lint/format
Delivered multiple client pro jects end-to-end (requirements, estimates, implementation, TestFlight).
URLSession / WebSockets
Developed an iOS app integrating Apple RoomPlan for room capture and floor-plan generation. Firebase

Codble - Lead iOS Engineer May 2024 - June 2025 Sentry / Datadog
A Foundation
V

Took full responsibility for architectural design, feature prioritization, and code quality, ensuring CoreData / Keychain
alignment with best practices and efficient performance throughout development.
SPM / CocoaPods / Carthage
Worked hand-in-hand with product managers, designers, and QA teams to refine and optimize Xcode Cloud / itrise / App Center
features, directly contributing to user engagement.
B

CD / ARC / async/await
Implemented modularized SwiftUI components and leveraged M M patterns.
G

it / itHub / itLab
VV
G G G

Accentico - OS D i eveloper Jun 202 - e 2024
3 S p Push Notifications / APNs
In-App Purchases / StoreKit / Apple Pay
Participated in feature planning and prioritization, leading each release from planning ot publishing, TestFlight / signing/provisioning
leveraged tools like ira and it for efficient task tracking and code reviews.
J G

Toolkit
Adapted to diverse cultural perspectives and remote collaboration tools, enhancing productivity and
fostering a cohesive team environment.
Created sophisticated UI elements and seamless transitions, balancing UIKit and SwiftUI for optimal
performance and aesthetic coherence across various screen sizes and orientations. Xcode
Figma
4K-Soft - OS D i eveloper Jul 2022 - Jun 202 3 Postman / Swagger
Integrated and improved In-App Purchases and Push Notifications, driving measurable growth in Notion
engagement and revenue, instituted code review standards, maintained adherence to SOLID. Sourcetree
Established a streamlined development workflow, facilitating clear communication between design Jira / Trello
and backend teams.

Education
Kyiv Polytechnic Institute Computer Science Jul 2022 - Jun 2025
Strong foundation in software engineering, including data structures & algorithms, operating
systems, databases, computer networks, distributed systems, and web application design.
Hands-on development using C# and Python: built Web APIs (ASP.NET), explored machine learning,
LLM training, data encryption.