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 (85)
cocoa10
apple-tv10
swiftui10
rxcocoa10
swift10
apple-watch10
splashscreen10
feedback-loop10
tvos10
uislider10
iphone10
watchos10
objective-c10
ios10
ipad10
Programming languages (4)
Github contributions (5)
elpassion/DropColour-iOS
Sep 2015 - Jul 2017
DropColour - Open-Source Arcade Game for iOS
Contributions:460 commits, 4 PRs, 33 pushes in 1 year 10 months
iosswift
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
swiftuislideriossliderslidercontroller
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