Jakub Kosiński
Software Developer at Jakub Kosiński
Lower Silesian Voivodeship, Poland
Summary
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Rockstar🎓
Top SchoolJakub Kosiński is a seasoned full-stack software developer with 17 years of experience building high-throughput web systems using Ruby on Rails and JavaScript/React. He blends hands-on engineering with domain-driven design, regularly applying RailsEventStore in production and contributing back to its ecosystem by improving metadata handling and test matchers. At Arkency and through his consultancy he tackles legacy modernization, complex e-commerce integrations, payment gateways and CRM/CMS projects while shaping product and architecture decisions. Based in Lower Silesia, Poland, he pairs practical implementation skills with a knack for turning ambiguous business problems into maintainable software solutions.
17 years of coding experience
Licencjat (Lic.), Computer Science, Licencjat (Lic.), Computer Science at Uniwersytet Wrocławski
Stackoverflow
899reputation
115kreached
24answers
1question
Github Skills (15)
rspec10
ruby-rails10
rails10
cqrs10
event-sourcing10
ruby10
domain-driven-design9
mysql6
redux6
rails-api6
activerecord6
javascript6
postgresql6
ruby-on-rails6
react6
Programming languages (4)
Github contributions (5)
RailsEventStore/rails_event_store
Apr 2018 - Jun 2018
A Ruby implementation of an Event Store based on Active Record
Role in this project:
Backend Developer
Backend DeveloperContributions:17 commits, 7 PRs, 13 pushes in 1 month
Contributions summary:Jakub focused on enhancing the Ruby Event Store library by introducing new functionalities and improving existing ones. They implemented a `with_metadata` method to dynamically set event metadata, enabling more flexible handling of event context within the application. Additionally, they added a publish matcher for RSpec, providing a testing tool to verify the publication of events within specific blocks of code, and deprecated the `metadata_proc` to guide users to the new `with_metadata` functionality. This demonstrates a focus on improving the library's core functionality and testability.
dddevent-sourcingrailsaggregate-rootcqrs-es
jakubkosinski/wiwizi
Mar 2009 - Apr 2009
Contributions:18 commits in 1 month
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