Johan Euphrosine
Chiyoda, Japan
Summary
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RockstarJohan Euphrosine is a versatile software engineer with 18 years of hands-on experience spanning embedded systems, backend services, and DevOps, based in Chiyoda, Japan. He contributes to prominent open-source projects—ranging from Android Things hardware drivers and Firebase Arduino samples to OpenROAD/OpenLane flow automation and Google Cloud client libraries—demonstrating a rare blend of low-level hardware integration and high-level infrastructure work. Johan’s strengths include automating build-and-test flows, improving Python and Node.js tooling, and writing reliable networked code and codecs, often adding tests and tightening error handling. Notably, he repeatedly bridges hardware and cloud, shipping device drivers and IoT samples while also shaping cloud SDKs and CI/container tooling, reflecting a pragmatic full-stack mindset. Colleagues would describe him as detail-oriented and curious, comfortable fixing subtle protocol bugs as well as streamlining complex release pipelines.
18 years of coding experience
French, English, Japanese
Stackoverflow
10,485reputation
424kreached
215answers
12questions
google-cloud-datastore
top-1%
go
top-5%
google-app-engine
top-1%
java
top-5%
subdomain
top-5%
python
top-5%
Github Skills (125)
verilog10
expressjs10
flow-control10
python10
testing10
http10
javas10
automation10
device-driver10
google-cloud10
build-automation10
pwm10
embedded10
rest-api10
firebase10
Programming languages (30)
Github contributions (5)
googlesamples/assistant-sdk-python
Feb 2017 - Feb 2020
Samples and bindings for the Google Assistant API
Role in this project:
Back-end Developer
Back-end DeveloperContributions:12 releases, 256 commits, 58 PRs in 3 years
Contributions summary:Johan primarily contributed to the project by importing code samples and samples from internal repositories, indicating a focus on integrating and utilizing existing functionalities within the Google Assistant SDK for Python. The commits also involved modifications to the protocol buffer files, specifically related to the assistant and its embedded API. This suggests a role in the development or integration of the core back-end logic and related APIs.
google-assistant-apiassistantprotocol-bufferspython
androidthings/sample-googleassistant
Apr 2017 - Sep 2018
Google Assistant API sample for Android Things
Role in this project:Full-stack Developer (Android)
Full-stack Developer (Android)Contributions:40 commits, 19 PRs, 18 pushes in 1 year 5 months
Contributions summary:Johan contributed to an Android Things project utilizing the Google Assistant API. Their work involved implementing voice recognition functionality by streaming pre-recorded audio and handling responses, including the handling of audio output. They also added support for various hardware boards by modifying the board defaults, and updating the project to use the new proto definitions and related API changes.
android-thingsgoogle-assistant-apiaiyprojects
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