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Andrzej Krzywda

person 23 connections

Arkency founder, wroclove.rb organizer, and frequent speaker. Former Java developer from the agile-code-quality wing of the Java community who switched to Ruby around 2004 after Rails appeared. Teaches the Rails Architect Master Class, which seeded Arkency's internal 'aggregates' repository. Author of influential Arkency blog posts that helped newcomers adopt DDD.

role
speaker
talk Functional Programming as Naming Lightning Talk
about
Andrzej Krzywda person
Refers to 'andre' — Andrzej Krzywda — as one of the speakers whose ideas and concepts the audience should extract essences from.
person Andrzej Krzywda
attended
wroclove.rb 2019 event
Co-organizer and speaker at the conference.
role: organizer
person Andrzej Krzywda
authored
Typical DDDomains In Rails Apps talk
Delivered the talk at wroclove.rb 2022.
person Andrzej Krzywda
authored
Business logic in Ruby talk
Krzywda introduces himself as both organizer and speaker and delivers this talk.
person Andrzej Krzywda
authored
Enterprise Rails Panel talk
Panelist representing rails_event_store / Arkency.
person Andrzej Krzywda
authored
Event-Driven Rails Discussion Panel talk
Arkency moderator who introduced the panel and steered the questions.
role: moderator
person Andrzej Krzywda
has_skill
Java tool
Former Java developer in the agile/code-quality wing of the community before moving to Ruby.
level: expert
person Andrzej Krzywda
recommends
Event Sourcing Enables Distribution takeaway
Describes event sourcing as the natural path from monolith to distributed system.
person Andrzej Krzywda
recommends
Domain-Driven Design concept
Arkency adopted DDD and refers to business-logic classes as aggregates.
person Andrzej Krzywda
recommends
Plain Old Java Object concept
Holds up the POJO ideal — business classes free of framework imports — as the standard to aspire to in Ruby.
person Andrzej Krzywda
recommends
State Machine concept
Argues most business logic is a state machine and should be implemented as such without libraries.
person Andrzej Krzywda
recommends
aggregates repository project
Invites the audience to explore and contribute to the newly public repository.
person Andrzej Krzywda
recommends
rails_event_store tool
Pitches it as the most productive DDD tool in Ruby.
person Andrzej Krzywda
recommends
rails_event_store/ecommerce project
Directs the audience to clone the repo and use its good-first-issue tickets as a sandbox.
person Andrzej Krzywda
recommends
Hotwire tool
Endorses Hotwire as a fit for read-model-driven views.
person Adam Piotrowski
recommends
Andrzej Krzywda person
Explicitly thanks Andrzej for the inspiration and encouragement to share the story.
person Andrzej Krzywda
related_to
Bartosz Blimke person
In 2006, Andrzej Krzywda introduced Bartosz Blimke (then a Java developer) to Ruby.
person Andrzej Krzywda
related_to
One machine please, make it Turing talk
Halasz jokes repeatedly that 'Andre made me do it' — Krzywda invited him as an organizer.
relationship: invited the speaker
project Arkency Knowledge Graph
related_to
Andrzej Krzywda person
Pri convinced 'boss Andre' (Andrzej Krzywda) to open-source the project
person Andrzej Krzywda
uses
Ruby on Rails tool
Switched from Java to Rails around 2004 and has worked in Rails ever since.
person Andrzej Krzywda
works_at
Arkency company
Arkency founder; moderated the panel.
role: founder
person Andrzej Krzywda
works_on
rails_event_store tool
Self-identifies as one of the people behind rails_event_store.
role: maintainer
person Andrzej Krzywda
works_on
Rails Architect Master Class resource
Teaches the master class; it triggered creation of the aggregates repository.
role: instructor

Provenance

Created
2026-04-17 16:16 seed
Last updated in
Business logic in Ruby — Andrzej Krzywda at wroclove.rb 2019 2026-04-17 16:18
Total updates
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