CoolStar
Software Engineer
San Francisco, California, United States
Summary
🤩
RockstarCoolStar is a seasoned software engineer with 13 years of experience building low-level and cross-platform systems, based in San Francisco. They specialize in iOS, Windows, and Linux development including kernel drivers, with notable contributions to coreboot and the Linux kernel. Their open-source work includes maintaining jailbreak tooling for iOS (Electra) and enhancing theos to build on Windows and support clang, reflecting deep expertise in build systems and platform compatibility. They’ve developed macOS drivers for Intel I2C controllers and touch devices, demonstrating hands-on proficiency in hardware interfacing, interrupt handling, and power management. Equally comfortable in userland and kernel contexts, they bridge system architecture and practical tooling to solve platform-specific challenges. A less obvious strength is their knack for porting and adapting code across OS boundaries, turning niche low-level problems into robust cross-platform solutions.
13 years of coding experience
Github Skills (32)
objective-c10
hid10
ios10
c-language10
multiplatform10
windows10
build-system10
cross-platform10
c-programming10
makefile10
i2c10
device-driver10
driver10
kernel-mode10
cygwin10
Programming languages (20)
Github contributions (5)
coolstar/electra1131
Jun 2018 - Jan 2019
Electra for iOS 11.0 - 11.3.1
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:62 commits, 5 PRs, 6 pushes in 7 months
Contributions summary:CoolStar primarily contributed to the Electra jailbreak for iOS 11.0-11.3.1 by implementing various features and utilities. They added functionality for listing APFS snapshots and interacting with them. Furthermore, the user worked on remounting the root filesystem, incorporating the rootfs remount based on the provided documentation, and updating the main application.
backportcydiaswiftioselectra
VoodooI2C/VoodooI2C
Dec 2015 - Jun 2019
Intel I2C controller and slave device drivers for macOS
Role in this project:Back-end Developer
Back-end DeveloperContributions:111 commits, 17 PRs, 45 pushes in 3 years 6 months
Contributions summary:CoolStar's primary contribution involves developing drivers for Intel I2C controllers and slave devices for macOS. They focused on implementing and refining drivers for trackpads, specifically the Cypress Gen3 and Elan models, and also added support for Atmel touch screen devices. The code changes include modifications to device initialization, interrupt handling, and the creation of a custom HID wrapper. The user appears to be porting code from other platforms, and making changes to existing drivers to improve functionality, including power management and support for the settings pane.
driverscontrolleri2cintelslave
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.