Grzegorz Andrejczyn
Lead Software Engineer at ZEN.COM
Cracow Metropolitan Area Poland
Summary
👤
Senior🎓
Top SchoolGrzegorz Andrejczyn is a Lead Software Engineer based in the Cracow metropolitan area with over a decade of hands-on experience building backend systems, leading teams, and shaping product-focused architecture. He has progressed through technical and managerial roles at Allegro and merXu and now leads engineering at ZEN.COM, combining deep backend expertise with a strong attention to frontend UX. Known for advocating minimal, measurable changes, he prioritizes outcomes and data-driven learning to ensure solutions deliver clear business value. Grzegorz fosters autonomy-driven teams that maximize contribution and engagement, pairing technical rigor with pragmatic leadership. His background in robotics and automation gives him a systems-oriented mindset that informs scalable, maintainable designs.
12 years of coding experience
15 years of employment as a software developer
Engineer's degree Robotics Technology/Technician, Engineer's degree Robotics Technology/Technician at Wrocław University of Science and Technology
Github Skills (44)
guzzle10
http-header9
gradle9
php9
curl9
extensible8
kotlin8
groovy8
http-client8
varnish8
psr-78
java8
rest7
newrelic7
gradle-plugin7
Programming languages (6)
Github contributions (5)
allegro/toper
Mar 2014 - Aug 2015
PHP Rest client based on popular Guzzle Rest Client.
Contributions:64 commits, 3 PRs, 5 pushes in 1 year 5 months
guzzlephprest-phprest-clientrest
allegro/newrelic-gradle-plugin
May 2015 - Feb 2016
Newrelic Gradle plugin.
Contributions:7 commits, 4 PRs, 6 pushes in 9 months
newrelicgradlegradle-plugin
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