Łukasz Mróz
Staff IOS Engineer at SonderMind
Wroclaw Metropolitan Area Poland
Summary
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Rockstar🎓
Top SchoolŁukasz Mróz is a Staff iOS Engineer based in Wrocław with 10 years of experience building reliable, user-focused mobile applications and libraries. He has progressed through senior engineering roles at mobile-first companies and currently leads iOS efforts at SonderMind, bringing deep expertise in Swift, reactive patterns (RxSwift), and networking abstractions. A consistent open-source contributor, Łukasz has improved widely used Swift projects—contributing to Moya, Quick, Danger (both JS and Swift), and utility libraries like SwiftyUserDefaults and Permission—often focusing on robust API design, SPM compatibility, and test automation. He combines hands-on UX enhancements (e.g., Gifski video trimming and Quick Look) with backend-focused improvements such as endpoint and download handling, showing comfort across full-stack iOS concerns. Known for careful refactors and pragmatic Linux/macOS workarounds, he brings attention to cross-platform edge cases that many mobile engineers miss. Trained in computer science at Wrocław University of Science and Technology, he pairs academic fundamentals with a decade of production mobile engineering.
10 years of coding experience
10 years of employment as a software developer
Informatyka, Informatyka at Wrocław University of Science and Technology
Stackoverflow
4,834reputation
598kreached
196answers
0questions
php
top-5%
swift
top-5%
ios
top-5%
Github Skills (59)
test-automation10
unit-testing10
json10
javascript10
ios10
rxswift10
mobile-development10
apidoc10
testing10
video-processing10
permission10
nsuserdefaults10
linux10
swiftui-app10
wget10
Programming languages (10)
Github contributions (5)
DroidsOnRoids/RxSwiftExamples
Feb 2016 - Sep 2017
Examples and resources for RxSwift.
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:140 commits, 7 PRs, 106 pushes in 1 year 7 months
Contributions summary:Łukasz primarily contributed to an iOS application utilizing RxSwift for reactive programming. Their work involved implementing UI components, integrating search functionality with a table view, and managing user interface elements within the app. The user also refactored the codebase, made enhancements related to the user interface and overall application structure, and integrated the use of RxAlamofire. The user also implemented UI interactions using RxCocoa.
rxswiftswiftiosreactivecocoa
sunshinejr/SwiftyUserDefaults
Feb 2018 - Aug 2021
Modern Swift API for NSUserDefaults
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:16 releases, 5 reviews, 426 commits in 3 years 7 months
Contributions summary:Łukasz appears to be primarily focused on refactoring and improving the architecture of a Swift library for handling `UserDefaults`. The contributions involve upgrading the project's Swift Package Manager (SPM) dependencies, implementing new protocols, and refactoring the code base by introducing property wrappers. Several commits involve enhancing the core functionality of the library, including adding support for custom types. The user also commented out and refactored array and custom types to accommodate the architectural changes.
apiswift4nsuserdefaultsiosswift
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