Simo Kinnunen
Principal Software Engineer at Checkly
Greater Tokyo Area Japan
Summary
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RockstarSimo Kinnunen is a Principal Software Engineer with 17 years of experience, currently based in the Greater Tokyo Area and focusing on scalable backend and mobile systems. He has a track record of leadership roles across startups and scale-ups—most recently at HeadSpin and now Checkly—where he combines deep hands-on engineering with architectural oversight. Simo is a seasoned Android systems contributor, notable for code in high-impact open-source projects like openstf/minicap and minitouch where he implemented virtual display capture and resilient multitouch input handling. Comfortable working close to the platform layer, he blends C/C++ and Java/Android expertise with a pragmatic approach to logging, diagnostics, and device management. Colleagues rely on him for solving low-level, hard-to-reproduce problems and for turning device- and performance-sensitive requirements into production-ready solutions.
17 years of coding experience
16 years of employment as a software developer
English, Finnish, Japanese, Swedish, German
Stackoverflow
5,697reputation
544kreached
7answers
1question
android
top-5%
adb
top-5%
json
top-1%
jq
top-5%
shell
top-5%
android-ndk
top-5%
Github Skills (31)
json10
javascript10
c-language10
mobile-development10
back-end-development10
c1110
android-development10
java10
mobile-application10
c1710
javas10
low-level-programming10
android10
logging10
nodejs10
Programming languages (15)
Github contributions (5)
openstf/STFService.apk
Feb 2014 - Jul 2018
Monitor and perform various actions on your Android device. Not meant for actual user devices.
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:165 commits, 2 PRs, 16 pushes in 4 years 6 months
Contributions summary:Simo primarily contributed to the Android mobile application by implementing various features. They focused on providing methods for managing the system's rotation settings. The user also added functionality to provide features regarding the volume and added a means to check and change the clipboard.
kotlinmonitorandroid-deviceandroid
openstf/minicap
Nov 2014 - Sep 2019
Stream real-time screen capture data out of Android devices.
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:175 commits, 6 PRs, 39 pushes in 4 years 10 months
Contributions summary:Simo contributed to the minicap project by implementing support for a virtual display capture method on Android devices, which involved direct interactions with the SurfaceComposerClient and related display management APIs. Their work focused on modifying the capture pipeline to provide screen captures compatible with various Android SDK versions and handling display size configurations. The user's work also included incorporating JPEG encoding using turbojpeg for image compression.
android-sdkandroid-devicesandroidkotlindata-capture
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