Jacek Królikowski
Senior Software Engineer at Grain
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolJacek Królikowski is a senior backend engineer with 13 years of experience building pragmatic, resilient systems across startups and large organisations. He combines deep functional-programming and Elixir expertise with hands-on architecture work—designing event-sourced backends, migration tools, and high-availability services while keeping developer velocity in mind. As an engineering lead at Fresha he guided company-wide architectural changes and improved developer experience for a 50+ engineer organisation, and more recently drives backend work at Grain. He founded Moving Pieces to deliver a hardware-software kinetic sculpture, demonstrating rapid prototyping, embedded C++ and cross-platform mobile skills beyond typical backend work. Comfortable with the full delivery lifecycle, he favors making or adapting the right tool for the job and mentoring teams to adopt stronger practices. Based in Warsaw, he’s open to consulting or contract roles that leverage his blend of systems design, pragmatic engineering and product-minded craftsmanship.
13 years of coding experience
9 years of employment as a software developer
Warsaw University of TechnologyBachelor's, Bachelor's at University of Warsaw
Polish, German, English
Stackoverflow
8,927reputation
859kreached
59answers
35questions
database
top-1%
elixir
top-5%
rest
top-5%
http
top-5%
insert
top-1%
mysql
top-1%
Github Skills (200)
genstage10
vim10
spacemacs10
esp3210
bootstrap-theme10
thin10
melpa10
emacs-lsp10
api10
emacs10
sql10
html10
database10
hidden10
platformio10
Programming languages (13)
Github contributions (5)
nietaki/erlangEditor
Apr 2016 - May 2016
Contributions:70 commits, 27 pushes, 1 branch in 24 days
nietaki/faceSwapper
Nov 2013 - Dec 2016
Contributions:9 commits, 1 push in 3 years 1 month
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