Michał Młoźniak
Lead Engineer (Special Projects) at Ogrodowisko
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolMichał Młoźniak is a pragmatic engineering leader with 13+ years of experience building scalable web platforms and currently leading AI engineering at Circle, focused on making LLM agents and copilots reliable in production. A Ruby and Rails veteran of 18 years who is language-agnostic, he combines deep hands-on debugging of model-tool interactions with product-minded delivery and team growth. He founded and personally developed Ogrodowisko, a Polish gardening site that reached millions of users and demonstrated his ability to own product, scale, and maintenance. As a former CTO and VP of Technology, he has scaled engineering teams, instituted delivery best practices, and driven platform stability and developer productivity. He contributes to open-source (notably work on the Errbit Airbrake-compatible error catcher) and pursues unconventional learning projects—currently rewriting PostgreSQL in Ruby—to gain system-level insight. Known for shipping usable products, mentoring engineers, and thriving on ambiguous, messy problems, he bridges research, production, and people.
13 years of coding experience
12 years of employment as a software developer
Master of Science (MSc), Computer Science, Master of Science (MSc), Computer Science at Warsaw University of Technology
English, Japanese, Polish
Stackoverflow
5,516reputation
181kreached
166answers
5questions
ruby
top-5%
heroku
top-1%
ruby-on-rails
top-5%
Github Skills (24)
json-parser10
json10
apidoc10
rspec10
jsonp10
ruby10
api10
parsing10
heroku10
error-handling10
api-design9
restful-api9
api-rest9
airbrake9
ruby-on-rails9
Programming languages (4)
Github contributions (5)
errbit/errbit
Jan 2015 - Feb 2015
The open source error catcher that's Airbrake API compliant
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 3 PRs, 8 comments in 24 days
Contributions summary:Michał primarily focused on implementing and refining the API for the Errbit error-catching platform. They added support for a new version of the Airbrake API (V3), including parsing JSON payloads and handling errors. The user also restructured the code to accommodate the new API version and created controller specifications. Additionally, the user fixed an issue related to parsing API notices without a backtrace.
apicatchererror-monitoringcompliantairbrake
visualitypl/juggler
Dec 2015 - Aug 2016
Contributions:40 PRs, 75 pushes, 42 branches in 7 months
online-toolcode-reviews
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