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MATVIY DEMKO
Senior iOS Engineer

100+ Apps Shipped | Swift | SwiftUI | Team Leadership

PROFESSIONAL SUMMARY WORK EXPERIENCE

Senior iOS Engineer with 5+ years of experience building and Lead iOS Engineer
shipping 100+ mobile applications from concept to App Store release. OXOIX | Apr 2025 – Apr 2026
Led and mentored a team of 3 iOS developers, designing scalable
Led a team of 3 iOS developers, mentoring and coordinating
mobile architecture, and delivering consumer applications using
development processes.
Swift and SwiftUI. Strong background in full product ownership,
Designed scalable application architecture and reusable
performance optimization, and mentoring engineering teams.
components.
Reduced development effort through reusable project templates
CONTACTS and optimized workflows.
Managed App Store release process and third-party integrations.
Built applications using Swift, SwiftUI, WebKit, and performance
optimization techniques.
Email: [open contact info](look above in the "contact info" section)
Phone: [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)
Location: Ukraine | Open to Remote / US / Europe Opportunities iOS Engineer
UPSTARS | Nov 2023 – Apr 2025
Developed and maintained iOS applications using Swift and
SKILLS & TECHNOLOGIES
SwiftUI.
Designed and implemented new features and functionality.
Improved application performance and user experience.
• Swift Collaborated with designers and backend teams.
• SwiftUI Integrated Firebase and external APIs.
• UIKit Built interactive mobile experiences using SpriteKit.
• Combine
• Swift Concurrency
• MVVM iOS Engineer
• WebKit Belmar Marketing | Feb 2023 – Oct 2023
• REST APIs Worked on corporate iOS applications.
• Firebase Integrated AI APIs and external services.
• CoreData Implemented new product functionality.
• Push Notifications
• CI/CD
Junior iOS Engineer
CORE EXPERTISE Davydson Consulting | Apr 2022 – Jan 2023
Worked with REST APIs, Firebase, MapKit, and Notifications.
Participated in development and maintenance of mobile
• Team Leadership applications.
• App Architecture
• Product Ownership Intern iOS Developer
• Performance Optimization
IT Parostok | Jan 2021 – Mar 2022
• Mobile Development
Worked in startup environment.
Collaborated with development teams.
KEY ACHIEVEMENTS Gained experience with Swift, Xcode, Git, and team workflows.

✔ Built and shipped 100+ mobile applications SELECTED PROJECT HIGHLIGHTS
✔ Led a team of 3 iOS developers
✔ Managed full application lifecycle from concept to App Store 100+ Mobile Apps
release
✔ 5+ years of iOS development experience Full product lifecycle ownership
App Store releases
SwiftUI architecture
Analytics integrations
EDUCATION Performance optimization

Mini-games / Interactive Apps
Bachelor's Degree SwiftUI
Donetsk National University SpriteKit
Custom animations
Reusable UI components