Andrzej Krzywda
CEO, Rails Developer at Arkency
Wroclaw Metropolitan Area Poland
Summary
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Rockstar🎓
Top SchoolAndrzej Krzywda is a seasoned Ruby on Rails engineer and CEO with 17 years building web and desktop database applications, leading Arkency since 2007 on consulting, training and ecommerce/CRM/CMS projects. He blends hands-on development with agile and XP practices, treating languages like tools—comfortable across Ruby, Java, PHP and C#. A regular contributor to Rails ecosystem tooling, he has implemented and refactored core event-store features (publish/subscribe, repository simplification) in notable projects such as rails_event_store. Based in Wroclaw, Poland, Andrzej pairs practical architectural judgement with a focus on maintainable, test-driven design, and often surfaces non-obvious tradeoffs by simplifying complex event workflows.
17 years of coding experience
9 years of employment as a software developer
M Sc, Computer Science, M Sc, Computer Science at University of Wroclaw
Stackoverflow
181reputation
7kreached
10answers
0questions
Github Skills (15)
activerecord10
cqrs10
event-sourcing10
domain-driven-design10
ruby10
rspec9
rails8
ruby-rails8
event-driven-architecture8
oop6
singleton6
export-to-excel6
sql6
database6
ruby-on-rails6
Programming languages (3)
Github contributions (5)
RailsEventStore/rails_event_store
Apr 2015 - Oct 2021
A Ruby implementation of an Event Store based on Active Record
Role in this project:
Back-end Developer
Back-end DeveloperContributions:111 commits, 3 PRs, 40 pushes in 6 years 6 months
Contributions summary:Andrzej focused on implementing and refactoring core features of an event store based on Active Record. Their contributions included adding a story-like test for the invoicing application, along with new event classes. They also introduced and refined the publish/subscribe mechanism for handling events, modifying the client and broker classes. Further, they worked on removing and refactoring several features for the event repository to streamline the code base, reducing its complexity.
dddevent-sourcingrailsaggregate-rootcqrs-es
hexagonaljs/hello-world
Dec 2012 - Mar 2014
Contributions:12 commits in 1 year 3 months
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