Michał Kołodziejski
Computing Engineer (Staff) at CERN
Łódź Voivodeship, Poland
Summary
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Top SchoolMichał Kołodziejski is a full-stack software engineer with 12 years of experience building web applications and cloud-native systems, comfortable across Python, Go, and JavaScript. He has a long-standing relationship with CERN, contributing to and improving Indico—CERN’s widely used open-source event management system—where he focused on backend features, report generation, and frontend static filters. His background spans telecom and call-center systems, Elixir microservices, and database migrations, reflecting a strong hands-on foundation in PostgreSQL and pragmatic system evolution. At STX Next and through multiple CERN roles he has balanced shipping production features with maintaining and modernizing legacy stacks. Michał’s work shows a blend of backend rigor and frontend fluency (React/Redux), plus an appetite for cloud-native tooling and cross-disciplinary collaboration in international teams. He is based in Łódź Voivodeship, Poland, and brings both academic depth and practical curiosity to complex engineering problems.
12 years of coding experience
5 years of employment as a software developer
Secondary Education, Computer Science, 4.5, Secondary Education, Computer Science, 4.5 at Stefan Żeromski 2nd General/Comprehensive Secondary School in Tomaszów MazowieckiBachelor's degree, Computer Science, 5, Bachelor's degree, Computer Science, 5 at Lodz University of Technology
German, English, French
Stackoverflow
8,110reputation
665kreached
206answers
20questions
macos-sierra
top-1%
ssh
top-1%
macos
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python
top-5%
Github Skills (16)
ssh10
macos10
python10
macos-sierra10
flask9
flask-ask9
sqlalchemy9
javascript9
html8
templating8
database-design7
java6
pip6
jquery6
regex6
Programming languages (17)
Github contributions (5)
indico/indico
Jun 2015 - May 2020
Indico - A feature-rich event management system, made @ CERN, the place where the Web was born.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1299 commits, 312 PRs, 117 pushes in 5 years
Contributions summary:Michał contributed to the Indico event management system by implementing features related to user contributions and generating reports. The user modified existing templates and created new ones for displaying contributions and contributed to the creation of a new module for static filters in JavaScript. The user also updated the code base to accommodate changes in the time table serialization process.
management-systemevent-management-systemeventspythoncern
mic4ael/indico-plugins-cern
Nov 2017 - Nov 2019
CERN-specific Indico plugins
Contributions:130 pushes, 20 branches in 2 years
indicocern
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