Paweł Pacana
Lower Silesian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolPaweł Pacana is a Staff Engineer with 15+ years building and modernizing high‑traffic Rails platforms, specializing in domain-driven design, event sourcing, and pragmatic migrations of legacy monoliths. He leads and maintains the RailsEventStore open‑source project, trains engineers through Arkency’s masterclasses, and regularly speaks at Ruby meetups, combining deep Rails expertise with thoughtful architecture. His work spans backend optimizations, CI and Docker improvements, and frontend apps in Elm, and he’s solved subtle production issues like cache leaks and memory OOMs that eluded others. Comfortable working directly with CTOs and cross-functional teams, he’s delivered zero‑downtime migrations and reliable verification systems that enabled safe product iterations. Based in Lower Silesia, Poland, Paweł pairs hands‑on engineering with mentorship and a knack for turning legacy constraints into scalable, observable systems.
15 years of coding experience
3 years of employment as a software developer
MSc Computer Science, MSc Computer Science at Wrocław University of Science and Technology
Stackoverflow
281reputation
3kreached
6answers
0questions
Github Skills (148)
rspec10
mvc10
hotwire10
coverage10
acceptance-testing10
ruby10
activerecord10
mutant10
ruby-on-rails10
static-analysis10
cqrs10
webmachine10
linux10
code-review10
mutation-testing10
Programming languages (10)
Github contributions (5)
arkency/nanoc-tailwind-starter
Mar 2020 - Feb 2021
Starting na new site with Nanoc? Drop-in this template to have a working setup with latest TailwindCSS tooling — all Ruby!
Contributions:32 commits, 6 PRs, 37 pushes in 11 months
nanocrubytailwindcss
mostlyobvious/webmachine-ruby
Dec 2018 - Jul 2024
Webmachine, the HTTP toolkit (in Ruby)
Contributions:2 pushes, 3 branches in 5 years 7 months
webmachineruby
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