Stein Janssen
Engineering Manager at Flatiron Health
Minato, Japan
Summary
👤
Senior🎓
Top SchoolStein Janssen is an engineering manager with 11 years of experience building scalable, secure backend systems and leading teams through domain-driven design and microservices adoption. Currently at Flatiron Health after managing safety-focused engineering and ML teams at Booking.com, he blends hands-on backend craft with roadmap ownership, on-call practices, and SLA-driven reliability. He has deep experience migrating monoliths to message-based microservices, maintaining Protobuf contracts, and fostering engineering growth through mentoring and hiring. Based in Minato, Japan, Stein is equally comfortable in architecture guilds and code reviews, and quietly extends his impact by improving service health processes and aligning technical and product roadmaps.
11 years of coding experience
10 years of employment as a software developer
Computer Science, Computer Science at Alfa College
Dutch, English, japans
Stackoverflow
4,100reputation
405kreached
30answers
13questions
php
top-1%
laravel
top-1%
Github Skills (63)
laravel10
php10
gulp9
socket9
woff8
google-fonts8
svg-font8
font-awesome8
logos8
css8
fonts8
platform-agnostic8
vorlon8
iconic8
admin7
Programming languages (5)
Github contributions (5)
stein189/Simple-PHP-Router
Feb 2017 - Oct 2017
Contributions:6 releases, 17 commits, 48 PRs in 8 months
routerphpphp-routingrouting
stein189/YesNoDialog
May 2015 - Feb 2016
Contributions:20 PRs, 46 pushes, 10 branches in 9 months
javascriptdialogyesjquery
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