Олег

Oleh Rozkvas
iOS Mobile Developer

Contact Summary
Phone Mobile Engineer with 8+ years of experience in building complex,
[открыть контакты](см. выше в блоке «контактная информация») cross-platform, high-performance mobile applications using
Email MAUI/Xamarin. Expert in mobile architecture (MVVM, Clean
[открыть контакты](см. выше в блоке «контактная информация») Architecture) and UI development. Hands-on experience leading
Location teams, mentoring developers, and delivering scalable solutions.
Lviv, Ukraine

Actively transitioning into native iOS development with a focus on
Swift/SwiftUI. Designing and developing responsive, scalable iOS
applications.

Skills Key Achievements
iOS Development ➤ Architecture improvements
Swift, UIKit, SwiftUI, Combine,
Async/Await, iOS SDK. Generated and adjusted architecture in projects for long-term
maintenance
Cross-platform ➤ Enhanced Application Stability
.NET MAUI, Xamarin.Forms,
C#, .NET. Reduced bug reports through proactive testing and debugging.
Improved performance of components
Architecture
➤ Mentoring People
MVVM, Clean Architecture,
SOLID, Design Patterns, Mentored Trainees and Juniors
Dependency Injection.
➤ Team Lead
Management
Jira, Confluence, Azure Led a team in developing a .NET MAUI application, ensuring high
DevOps code quality, architectural decisions, and cross-platform
performance optimization
Version Control
➤ MAUI migration
GIT, Bitbucket, GitHub, GitLab
Successfully migrated projects from Xamarin Forms to MAUI
CI/CD
Jenkins
Experience
Languages Self-Employed
English 10/2025 - present
Upper Intermediate iOS Developer
Developed an iOS application for a dance school, enabling users to manage
Ukrainian
Native subscriptions, track personal data, and view class schedules. Contributed across the full
development lifecycle, including architecture design and implementation.
Implemented an MVVM architecture, integrated RESTful APIs, and modularized the
codebase to improve scalability and maintainability. Gained hands-on experience with
Server-Sent Events (SSE) for real-time updates and MongoDB query filters. Additionally,
built a customizable Design System and implemented runtime localization.
Stack technologies: Swift, SwiftUI, Combine, async/await, GitHub, REST API.
Education Edvantis
05/2025 - 01/2026

Computer Sciences, Master Senior .NET MAUI Developer
Degree Developed a mobile application for hospital surgeons to manage patient status and
Lviv Polytechnic National University monitor treatment progress in real time. Led performance optimisations by resolving
09/2018 - 12/2019 critical bottlenecks and improving overall responsiveness. Delivered core features such
as real-time chat, patient status tracking, and team coordination. Gained experience
Computer Sciences, Bachelor
Degree with Couchbase Capella for data storage and synchronisation, SignalR for real-time
Lviv Polytechnic National University communication, and OneSignal for cross-platform push notifications.
09/2014 - 06/2018 Stack technologies: MAUI, .NET, SignalR, Couchbase Capella, OneSignal, Azure
DevOps, Gitlab
Information technologies
specialization
Drohobych Pedagogical Lyceum GlobalLogic
09/2012 - 06/2014 11/2018 – 05/2025
Senior MAUI Developer / Team Lead (01/2024 – 05/2025)
Senior Xamarin Developer (07/2022 – 01/2024)
Middle Xamarin Developer (11/2018 – 06/2022)
Led development of two related mobile applications for elevator and escalator
maintenance and commissioning. Established a shared core architecture, extracting
common functionality into reusable modules and NuGet packages to enable scalability
and long-term maintainability. Designed and implemented multi-protocol
communication with industrial controllers over BLE, TCP, and Redpark cable, unifying
data transfer through a stream-based abstraction. Architected flexible build
configurations, allowing dynamic inclusion/exclusion of control components based on
target environments. Refactored and generalized components to support both
elevator and escalator use cases. Drove the migration from Xamarin to .NET MAUI,
modernizing the codebase and improving development velocity. Led and mentored a
team of 5 developers, supporting knowledge sharing and onboarding of junior
engineers. Implemented native integrations, including creating .NET bindings for C
libraries (Redpark) and handling low-level BLE communication pipelines.
Utilized TinyIoC for dependency injection.
Stack technologies: MAUI, Xamarin Forms, .NET, BLE, Redpark, TCP, SignalR, Jira,
Confluence, Bitbucket, Jenkins, Figma

Lvivity
11/2017 – 11/2018
Junior Xamarin Developer
Developed a Xamarin Native mobile application for convenience store network
auditing. I delivered features and fixed bugs.
Stack technologies: Xamarin Native, .NET, Jira, Confluence, Bitbucket, Jenkins

Conceptarea
06/2017 – 11/2017
Trainee WPF Developer
Developed a WPF desktop application for data reading and analysis from the SCT
device, which collects motor analytics. Analyzed and fixed software issues. Used
Synfusion and SciChart high-performance packages for making charts and other
widgets
Stack technologies: WPF, .NET, Jira, Bitbucket, Syncfusion