Mateusz Szklarek
Senior IOS Engineer, Lumo (LLM-powered Assistant) at Proton
Zurich, Zurich, Switzerland
Summary
👤
Senior🎓
Top SchoolMateusz Szklarek is a Senior iOS Engineer with 11 years of experience building secure, high-performance apps and SDKs across the Apple ecosystem, currently working on Proton’s Lumo LLM-powered assistant. He has led mobile-first API design, modularized large codebases, and driven CI/CD and test automation that cut deployment time by 40% and sped UI test pipelines 2.5x. A strong advocate and practitioner of TDD/BDD, he has embedded testing culture into teams and shipped projects with very high coverage and reliability. His cryptography experience is hands-on — implementing AES-256, ECC-25519 and RSA in production to protect user data at scale for privacy-first mail and calendar products used by millions. Mateusz also mentors engineers, runs knowledge-sharing sessions on Combine, TDD and cryptography, and has a background in biomedical engineering that informs his pragmatic, safety-conscious approach to system design. He combines deep iOS expertise with security-first thinking and a track record of making complex features maintainable and performant.
11 years of coding experience
7 years of employment as a software developer
Master's Degree Specialization: Biomechatronics and Medical Equipment, Biomedical/Medical Engineering, Master's Degree Specialization: Biomechatronics and Medical Equipment, Biomedical/Medical Engineering at The Silesian University of Technology
Polish, English
Stackoverflow
31reputation
343reached
1answer
2questions
Github Skills (106)
cocoa10
apple-tv10
swiftui10
podfile10
rxcocoa10
xctest10
swift10
apple-watch10
arcade10
feedback-loop10
xcode10
tvos10
widgetkit10
macos10
iphone10
Programming languages (4)
Github contributions (5)
mateuszszklarek/MSTwitterSplashScreen
Apr 2015 - Feb 2016
Contributions:64 commits, 1 PR, 37 pushes in 9 months
mateuszszklarek/SliderController
Jul 2017 - Sep 2017
Customized UISlider subclass managed by SliderController written in Swift
Contributions:6 releases, 117 commits, 14 PRs in 1 month
customizeduisliderswiftiosswiftui
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