Matt Rajca
iOS Developer
Chicago, Illinois, United States
Summary
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RockstarMatt Rajca is an experienced iOS and macOS software engineer based in Chicago with 16 years of hands-on development across mobile and system-level projects. He blends a practical engineering focus with interests in design and music, often bringing thoughtful UX touches to security-sensitive features like his Touch ID integration for a sudo fork. Matt has contributed to core open-source projects—expanding test coverage in Swift’s Foundation corelibs and refactoring components in the Parrot VM—demonstrating a knack for quality, tooling, and maintainable code. Comfortable across QA, test automation, backend refactoring, and native mobile work, he delivers reliable, well-tested solutions that bridge user-facing apps and low-level libraries. Colleagues would describe him as a curious generalist who values learning, travel, and the occasional pancake-fueled late-night coding session.
16 years of coding experience
Github Skills (16)
c1710
objective-c10
swift10
ios10
parrot10
virtual-machine10
c1110
xctest10
foundation10
test-automation10
dynamic-linking9
strings9
c-string9
api8
security8
Programming languages (8)
Github contributions (5)
mattrajca/sudo-touchid
Oct 2016 - Nov 2016
A fork of `sudo` with Touch ID support.
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:16 commits, 1 PR, 25 pushes in 29 days
Contributions summary:Matt contributed to the `sudo-touchid` repository by adding support for Touch ID authentication. They introduced code to integrate the LocalAuthentication framework, enabling users to authenticate privileged operations using biometric authentication. The changes included implementing setup and verification functions for Touch ID, handling potential errors, and updating the user prompt for authentication. This work significantly enhances the security of the sudo command by adding biometric authentication.
rusttouchtouchbarsudotouch-id
swiftlang/swift-corelibs-foundation
Dec 2015 - Jan 2018
The Foundation Project, providing core utilities, internationalization, and OS independence
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:17 commits, 19 PRs, 25 comments in 2 years 2 months
Contributions summary:Matt focused on implementing and expanding the test suite for the `swift-corelibs-foundation` repository. Their contributions included adding new tests for `NSAffineTransform`, `NSScanner`, `NSData`, `FileManager`, and `XMLDocument`. They also modified existing test cases to ensure thorough coverage of various functionalities within the Foundation framework. This work was crucial for maintaining the quality and stability of the core Swift libraries.
tvostranslationinternationalizationfoundationindependence
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