Kacper Rączy
iOS Developer at Comma.ai, Inc.
United States
Summary
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RockstarKacper Rączy is an iOS developer with nine years of hands-on experience building mobile UIs and integrating complex systems, currently based in the United States. He combines mobile engineering with back-end and DevOps know-how, contributing to high-impact open-source projects like commaai’s openpilot—helping extend driver-assistance support across hundreds of cars—and the UTM virtual machine for iOS where he implemented terminal UI and integration. Passionate about computer vision and generative deep learning, he brings that research-minded curiosity to practical engineering challenges. Comfortable moving between Swift UI work and system-level integrations, he has a track record of shipping robust features that bridge user-facing interfaces and low-level process control. Notably, his contributions span both product UX (terminal emulation in UTM) and safety-adjacent systems (ecamera and process whitelisting in openpilot), reflecting a rare blend of polish and systems depth.
8 years of coding experience
English
Github Skills (21)
wkwebview10
ios10
python10
python-multiprocessing10
multi-process10
multiprocessing10
drive9
javascript9
robotics9
git9
objective-c9
sys9
system9
html9
driver9
Programming languages (11)
Github contributions (5)
commaai/openpilot
Sep 2018 - Apr 2025
openpilot is an operating system for robotics. Currently, it upgrades the driver assistance system on 275+ supported cars.
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:104 reviews, 349 PRs, 1127 pushes in 6 years 7 months
Contributions summary:Kacper contributed to the openpilot operating system for robotics, specifically focusing on code improvements related to the ecamera and whitelist-proc features. They implemented support for ecamera, including wideRoadCameraState and modifications to the FrameReader, addressing issues related to use_route_meta. Additionally, they added support for whitelist-procs to control process toggling during regen, along with other code enhancements.
cruise-controlracingopenpilotadaptiveadaptive-cruise-control
utmapp/UTM
Feb 2020 - Mar 2020
Virtual machines for iOS and macOS
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:21 commits, 2 PRs, 1 comment in 28 days
Contributions summary:Kacper primarily focused on building the user interface and integrating the hterm terminal emulator within the UTM virtual machine application. They implemented core components such as `UTMTerminal`, `VMTerminalViewController`, and integrated JavaScript and HTML for the terminal UI. The contributions included handling user input, managing the terminal's communication pipes, and overall enhancements to the console mode experience within the iOS environment.
machinesutmvirtual-machinesqemuemulation
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