Jonah Stiennon
Senior Manager - ML Integration
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolJonah Stiennon is a senior software leader with 14 years of experience building reliable, production-grade systems and teams from embedded firmware to cloud ML integrations. Currently leading ML integration at Workday, he has a track record of shipping IoT and SaaS products—most notably heading software at Origin through a successful $100M acquisition by Stratasys. Jonah pairs hands-on engineering chops (deep mobile automation and Appium contributions, plus iOS/Android driver work) with operational rigor from roles running infra, SRE, and dev teams at fast-moving startups like Eaze and Sauce Labs. He’s comfortable across the stack—firmware, backend, web, and test automation—and has repeatedly turned chaotic codebases into stable, team-scalable platforms. Outside work he invents hardware-driven experiences (E-ink playing cards) and has co-founded a GPT-powered knowledge product, showing both product curiosity and maker instincts. Based in San Francisco with a CS degree from Michigan Tech, he blends pragmatic leadership with sustained open-source impact in mobile testing ecosystems.
14 years of coding experience
9 years of employment as a software developer
BS Computer Science Computer Science, BS Computer Science Computer Science at Michigan Technological University
English, Japanese
Stackoverflow
5,325reputation
1.3mreached
42answers
5questions
Github Skills (36)
objective-c10
selenium-webdriver10
javascript10
ios10
android-adb10
webdriver10
selenium10
testing10
safari10
selenium-ide10
java10
javas10
android10
ui-automation10
appium10
Programming languages (18)
Github contributions (5)
appium/java-client
Apr 2014 - Jan 2016
Java language binding for writing Appium Tests, conforms to W3C WebDriver Protocol
Role in this project:
Mobile Developer (Android/iOS)
Mobile Developer (Android/iOS)Contributions:5 releases, 199 commits, 39 PRs in 1 year 9 months
Contributions summary:Jonah's contributions centered on adding and enhancing features related to context management and UI automation for Appium's Java client. They introduced the ability to switch between application contexts and retrieve context handles. They also implemented the iOS and Android UI automation locator strategies, along with convenience methods for gestures such as tapping, zooming and pinching. Furthermore, the user added methods for common mobile device actions like key event handling, getting and setting network connection settings, and setting app settings, demonstrating a focus on expanding the client's functionality.
bindingselenium-javawindowsappium-testsappium
appium/appium-android-driver
Jul 2015 - Feb 2019
Common methods collection used by Android drivers
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:37 commits, 15 PRs, 19 pushes in 3 years 6 months
Contributions summary:Jonah focused on developing the Android driver for the Appium project. They implemented unit tests, added functionalities for device initialization, including ADB setup and app installation, and integrated UI automation using UiAutomator. The contributions also involved adding and modifying commands, and refactoring code for better functionality. The user addressed bugs and improved the overall flow of the Android driver.
androidappium
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