Олег

OLEH TYSHCHENKO
IOS/MACOS DEVELOPER
CONTACTS [відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») Telegram
LinkedIn GitHub Dnipro, Ukraine

SUMMARY iOS/macOS Developer with 4 years of experience building scalable applications using Swift,
SwiftUI, and system-level APIs. Strong understanding of MVVM, Clean Architecture, SOLID
principles, multithreading, and networking (URLSession, WebSocket). Experienced in
maintaining mixed-codebase applications with Swift, Objective-C, C, and C++, integrating
RESTful APIs, working with JSON and native storage solutions, and ensuring production
stability. Improved app stability by reducing crashes by 30% and optimized workflows,
reducing manual effort by 30–40%. Confident in code review, Git workflows, and maintaining
clean, well-structured codebases focused on long-term product quality.
EXPERIENCE Software Developer, Apriorit SEPTEMBER 2021 - MAY 2025

I worked on projects related to macOS system events, Keychain access, macOS application data
and interfaces, and the implementation of passwordless authentication.
Key Achievements:
Optimized core functionality, reducing application crashes by 30% and significantly
increasing UI responsiveness.
Automated developer workflows by building a custom macOS tool, which cut manual task
time by 40% for the entire team.
Engineered a passwordless authentication flow using hardware security keys (YubiKey),
enhancing security compliance and UX.
Integrated Endpoint Security API and low-level C/C++ modules into Swift, providing deep
system monitoring with minimal CPU overhead.
Developed modern SwiftUI interfaces, focusing on modular architecture and scalability for
future iOS/macOS features.
Reduced post-release bugs by 20% through proactive debugging, automated testing, and
close collaboration with QA teams.
SKILLS Programming Languages: Swift, Objective-C, C++
Frameworks & Libraries: Foundation, SwiftUI, LocalAuthentication, Security Framework,
URLSession, Structured Concurrency, Combine, SwiftData
Networking & System Integration: Endpoint Security API (process and event monitoring),
System Events Handling (Process Monitoring, Event Taps), Keychain Services (credentials
management), FIDO2/WebAuthn (libdo2, YubiKey SDK), URLSession, REST API, JSON
UI Development: SwiftUI, Interface Builder, Storyboards
Development & Debugging Tools: Xcode (Instruments, Debugger), LLDB, GDB, Clang,
LLVM
Development Practices: OOP, SOLID, Test-Driven Development, Dependency Injection,
MVVM
Testing & Automation: Google Test (gtest), Google Mock (gmock), Fake Implementation
Version Control: Git, GitHub, Bitbucket, SourceTree
Project Management & Collaboration: Agile, Scrum, Jira, Confluence
Languages: English - Intermediate (B1), Ukrainian - Native (C2)

EDUCATION OLES HONCHAR DNIPRO NATIONAL UNIVERSITY, BACHELOR'S DEGREE IN
COMPUTER SCIENCE
SEPTEMBER 2018 - JUNE 2022

OLES HONCHAR DNIPRO NATIONAL UNIVERSITY, MASTER'S DEGREE IN
COMPUTER SCIENCE
SEPTEMBER 2022 - JANUARY 2024

COURSES 3D MODELLING, AMC BRIDGE
OCTOBER 2019 - FEBRUARY 2020

LOW-LEVEL PROGRAMMING, APRIORIT
JUNE 2021 - AUGUST 2021