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I'm Marek Truszkowski, Staff / Senior iOS Engineer with over 10 years of experience architecting high-scale mobile applications and frameworks. I combine deep expertise in low-level system internals with an aesthetic sense for pixel-perfect UI. I enjoy turning complex problems into elegant, robust solutions. I'm passionate about curiosity-driven side projects to stay current with iOS/SwiftUI trends and adjacent technologies, and I love mentoring others and sharing knowledge to improve team quality and impact.…I'm Marek Truszkowski, Staff / Senior iOS Engineer with over 10 years of experience architecting high-scale mobile applications and frameworks. I combine deep expertise in low-level system internals with an aesthetic sense for pixel-perfect UI. I enjoy turning complex problems into elegant, robust solutions. I'm passionate about curiosity-driven side projects to stay current with iOS/SwiftUI trends and adjacent technologies, and I love mentoring others and sharing knowledge to improve team quality and impact.

Marek Truszkowski

App Developer, Web Developer, Full Stack Developer, +2

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I'm Marek Truszkowski, Staff / Senior iOS Engineer with over 10 years of experience architecting high-scale mobile applications and frameworks. I combine deep expertise in low-level system internals with an aesthetic sense for pixel-perfect UI. I enjoy turning complex problems into elegant, robust solutions. I'm passionate about curiosity-driven side projects to stay current with iOS/SwiftUI trends and adjacent technologies, and I love mentoring others and sharing knowledge to improve team quality and impact.…I'm Marek Truszkowski, Staff / Senior iOS Engineer with over 10 years of experience architecting high-scale mobile applications and frameworks. I combine deep expertise in low-level system internals with an aesthetic sense for pixel-perfect UI. I enjoy turning complex problems into elegant, robust solutions. I'm passionate about curiosity-driven side projects to stay current with iOS/SwiftUI trends and adjacent technologies, and I love mentoring others and sharing knowledge to improve team quality and impact.

Available to hire

I’m Marek Truszkowski, Staff / Senior iOS Engineer with over 10 years of experience architecting high-scale mobile applications and frameworks. I combine deep expertise in low-level system internals with an aesthetic sense for pixel-perfect UI. I enjoy turning complex problems into elegant, robust solutions.

I’m passionate about curiosity-driven side projects to stay current with iOS/SwiftUI trends and adjacent technologies, and I love mentoring others and sharing knowledge to improve team quality and impact.

Skills

Swift

Objective-C

Kotlin

Experience Level

Swift

Expert

Objective-C

Expert

Kotlin

Intermediate

Language

Polish

Fluent

English

Advanced

Spanish; Castilian

Beginner

Work Experience

Staff iOS Engineer (L6) at Nethone (acquired by Mangopay)

January 1, 2019 - Present

High-Performance SDK Architect: Designed the Profiler SDK (secure anti-fraud framework) from scratch to production, ensuring zero impact on critical paths in apps. Processing billions of sessions per day. Supports ReactNative, Flutter, and Unity. Security Engineering: Implemented compromised-device detection vectors and a custom networking stack. Led Mobile iOS Profiling R&D team, translating business goals into concrete initiatives. Architecture & Streaming: Led iOS development for WP Pilot (TV streaming app). UI/UX: Delivered pixel-perfect UIs for flagship apps. Reactive Programming: Engineered scalable architectures using RxSwift. Mentorship: Established code quality and testing standards. Anti-Fraud Innovation: Profiler SDK recognized as top-tier against reverse engineering. Awards: Best B2C Mobile Application (2017) for WP Pilot, Honorable Mention at Allegro Hackathon (2015).

Senior iOS Developer at Wirtualna Polska

January 1, 2016 - January 1, 2019

Contributed to iOS applications within WP portfolio, implementing features, performance optimizations, and UI enhancements.

Freelance iOS Dev at Self-employed

January 1, 2015 - January 1, 2016

End-to-end delivery of commercial iOS apps with custom UI for diverse clients.

Junior iOS Dev at LOOKSOFT

January 1, 2014 - January 1, 2015

Development for diverse enterprise and institutional clients.