Andrzej Krzywda
@andrzejkrzywda.bsky.social
Arkency | RailsEventStore | wroc_love.rb
Rails programmer since 2004
Chess player aspiring to become IM
coffee amateur
sf books lover
DDD, CQRS, Event Sourcing
Rails programmer since 2004
Chess player aspiring to become IM
coffee amateur
sf books lover
DDD, CQRS, Event Sourcing
Reposted by Andrzej Krzywda
There would be no wroclove.rb without our amazing supporters 💫
Arkency has been with us since the very first edition, and we’re extremely grateful to have them on board again this year - thank you for making our conference possible since day one! (1/3)
arkency.com
Arkency has been with us since the very first edition, and we’re extremely grateful to have them on board again this year - thank you for making our conference possible since day one! (1/3)
arkency.com
November 25, 2025 at 9:13 PM
There would be no wroclove.rb without our amazing supporters 💫
Arkency has been with us since the very first edition, and we’re extremely grateful to have them on board again this year - thank you for making our conference possible since day one! (1/3)
arkency.com
Arkency has been with us since the very first edition, and we’re extremely grateful to have them on board again this year - thank you for making our conference possible since day one! (1/3)
arkency.com
Reposted by Andrzej Krzywda
Since 2012, @andrzejkrzywda.bsky.social has been shaping wroclove.rb💎
A long-time DDD advocate, he recently took the stage with a keynote on how DDD fits into Rails ➡️ check it out youtu.be/3IlWgwkTV0s
Andrzej’s chessboard is coming to wroclove.rb - fancy a game with him in April?♟️
A long-time DDD advocate, he recently took the stage with a keynote on how DDD fits into Rails ➡️ check it out youtu.be/3IlWgwkTV0s
Andrzej’s chessboard is coming to wroclove.rb - fancy a game with him in April?♟️
October 24, 2025 at 3:21 PM
Since 2012, @andrzejkrzywda.bsky.social has been shaping wroclove.rb💎
A long-time DDD advocate, he recently took the stage with a keynote on how DDD fits into Rails ➡️ check it out youtu.be/3IlWgwkTV0s
Andrzej’s chessboard is coming to wroclove.rb - fancy a game with him in April?♟️
A long-time DDD advocate, he recently took the stage with a keynote on how DDD fits into Rails ➡️ check it out youtu.be/3IlWgwkTV0s
Andrzej’s chessboard is coming to wroclove.rb - fancy a game with him in April?♟️
Reposted by Andrzej Krzywda
Save the date! @wrocloverb.com is back on April 17–19, 2026 💎
We’ve got big plans to make this edition unforgettable. Stay tuned for updates - and see you in Wrocław!
We’ve got big plans to make this edition unforgettable. Stay tuned for updates - and see you in Wrocław!
September 26, 2025 at 5:49 PM
Save the date! @wrocloverb.com is back on April 17–19, 2026 💎
We’ve got big plans to make this edition unforgettable. Stay tuned for updates - and see you in Wrocław!
We’ve got big plans to make this edition unforgettable. Stay tuned for updates - and see you in Wrocław!
Reposted by Andrzej Krzywda
Our crew doesn’t just organize wroclove.rb - we also share our knowledge at other conferences 💡
This year, our co-organizer @jan.dudulski.pl took the stage at @friendlyrb.com with his talk "Back to Simplicity" - huge thanks to our friends there for having him!
This year, our co-organizer @jan.dudulski.pl took the stage at @friendlyrb.com with his talk "Back to Simplicity" - huge thanks to our friends there for having him!
September 23, 2025 at 2:57 PM
Our crew doesn’t just organize wroclove.rb - we also share our knowledge at other conferences 💡
This year, our co-organizer @jan.dudulski.pl took the stage at @friendlyrb.com with his talk "Back to Simplicity" - huge thanks to our friends there for having him!
This year, our co-organizer @jan.dudulski.pl took the stage at @friendlyrb.com with his talk "Back to Simplicity" - huge thanks to our friends there for having him!
Happy to share that I’m speaking at the ParisRb meetup on Tuesday, July 1st
I will talk about Rails and DDD, my lesson from the last 15 years of combining them together.
meetu.ps/e/PbpBx/dVM8l/i
I will talk about Rails and DDD, my lesson from the last 15 years of combining them together.
meetu.ps/e/PbpBx/dVM8l/i
June 28, 2025 at 10:46 AM
Happy to share that I’m speaking at the ParisRb meetup on Tuesday, July 1st
I will talk about Rails and DDD, my lesson from the last 15 years of combining them together.
meetu.ps/e/PbpBx/dVM8l/i
I will talk about Rails and DDD, my lesson from the last 15 years of combining them together.
meetu.ps/e/PbpBx/dVM8l/i
20 years in and people still fall in love with Rails
June 28, 2025 at 10:41 AM
20 years in and people still fall in love with Rails
Reposted by Andrzej Krzywda
Time goes by and we're ready to show off all the great talks that we've had at #wrocloverb this year 🌟
Let's begin with @joel.drapper.me presentation on typing in Ruby and Literal - set of tools to help you write more expressive, confident Ruby. Enjoy!
Let's begin with @joel.drapper.me presentation on typing in Ruby and Literal - set of tools to help you write more expressive, confident Ruby. Enjoy!
1. Joel Drapper - Ruby has literally always had types - wroc_love.rb 2025
youtu.be
May 31, 2025 at 2:11 PM
Time goes by and we're ready to show off all the great talks that we've had at #wrocloverb this year 🌟
Let's begin with @joel.drapper.me presentation on typing in Ruby and Literal - set of tools to help you write more expressive, confident Ruby. Enjoy!
Let's begin with @joel.drapper.me presentation on typing in Ruby and Literal - set of tools to help you write more expressive, confident Ruby. Enjoy!
Rails was the AI of 2000s.
✅Creating apps became much faster.
✅Testing business ideas became cheaper.
✅Business loved it.
✅VCs loved it.
✅Divided devs into enthusiasts and sceptics.
But when apps grew?
That’s when things got tricky.
✅Creating apps became much faster.
✅Testing business ideas became cheaper.
✅Business loved it.
✅VCs loved it.
✅Divided devs into enthusiasts and sceptics.
But when apps grew?
That’s when things got tricky.
May 30, 2025 at 6:21 PM
Rails was the AI of 2000s.
✅Creating apps became much faster.
✅Testing business ideas became cheaper.
✅Business loved it.
✅VCs loved it.
✅Divided devs into enthusiasts and sceptics.
But when apps grew?
That’s when things got tricky.
✅Creating apps became much faster.
✅Testing business ideas became cheaper.
✅Business loved it.
✅VCs loved it.
✅Divided devs into enthusiasts and sceptics.
But when apps grew?
That’s when things got tricky.
Reposted by Andrzej Krzywda
One of the best parts of conferences is finally meeting people you’ve only known through GitHub & X.
Got to meet @andrzejkrzywda.bsky.social
@sethhorsley.bsky.social
@fractaledmind.bsky.social
@joel.drapper.me
#wrocloverb
Got to meet @andrzejkrzywda.bsky.social
@sethhorsley.bsky.social
@fractaledmind.bsky.social
@joel.drapper.me
#wrocloverb
April 11, 2025 at 5:28 PM
One of the best parts of conferences is finally meeting people you’ve only known through GitHub & X.
Got to meet @andrzejkrzywda.bsky.social
@sethhorsley.bsky.social
@fractaledmind.bsky.social
@joel.drapper.me
#wrocloverb
Got to meet @andrzejkrzywda.bsky.social
@sethhorsley.bsky.social
@fractaledmind.bsky.social
@joel.drapper.me
#wrocloverb
Let’s start this Ruby weekend in Poland 🔥
April 11, 2025 at 2:18 PM
Let’s start this Ruby weekend in Poland 🔥
March 24, 2025 at 6:02 PM
DDD is AI-friendly
clear modules and boundaries makes it easier to reason about for both humans and AI (smaller context!)
clear modules and boundaries makes it easier to reason about for both humans and AI (smaller context!)
March 14, 2025 at 12:10 PM
DDD is AI-friendly
clear modules and boundaries makes it easier to reason about for both humans and AI (smaller context!)
clear modules and boundaries makes it easier to reason about for both humans and AI (smaller context!)
New blog post on the Arkency blog!
Piotr has just published his first post, sharing our journey to stabilize a nearly 10-year-old Rails application for a client. The app was using a microservices pattern—but not in the most effective way.
blog.arkency.com/is-your-rail...
Piotr has just published his first post, sharing our journey to stabilize a nearly 10-year-old Rails application for a client. The app was using a microservices pattern—but not in the most effective way.
blog.arkency.com/is-your-rail...
Is your Rails application special?
Hi, we're Arkency and it's our blog with meaty content.
blog.arkency.com
March 11, 2025 at 11:02 AM
New blog post on the Arkency blog!
Piotr has just published his first post, sharing our journey to stabilize a nearly 10-year-old Rails application for a client. The app was using a microservices pattern—but not in the most effective way.
blog.arkency.com/is-your-rail...
Piotr has just published his first post, sharing our journey to stabilize a nearly 10-year-old Rails application for a client. The app was using a microservices pattern—but not in the most effective way.
blog.arkency.com/is-your-rail...
I posted 2 tweets on X today and X stopped working.
Sorry everyone 🤷♂️ (or not)
Sorry everyone 🤷♂️ (or not)
March 10, 2025 at 5:56 PM
I posted 2 tweets on X today and X stopped working.
Sorry everyone 🤷♂️ (or not)
Sorry everyone 🤷♂️ (or not)
A friendly reminder that as Arkency we help with modernizing existing (legacy) Rails apps.
It doesn't matter if the Rails app was originally created by human devs or AI.
As such, we're big fans of AI, more business for us 😎
It doesn't matter if the Rails app was originally created by human devs or AI.
As such, we're big fans of AI, more business for us 😎
March 10, 2025 at 5:52 PM
A friendly reminder that as Arkency we help with modernizing existing (legacy) Rails apps.
It doesn't matter if the Rails app was originally created by human devs or AI.
As such, we're big fans of AI, more business for us 😎
It doesn't matter if the Rails app was originally created by human devs or AI.
As such, we're big fans of AI, more business for us 😎
„You must be one of the oldest Rails agencies”
the message I just received
never thought about it this way, but yeah
the message I just received
never thought about it this way, but yeah
March 10, 2025 at 12:43 PM
„You must be one of the oldest Rails agencies”
the message I just received
never thought about it this way, but yeah
the message I just received
never thought about it this way, but yeah
Reposted by Andrzej Krzywda
Shoutout to @szymonfiedler.bsky.social!
Szymon will present a practical methodology for verifying business logic equivalence during rewrites, focusing on isolating side effects and leveraging existing system behavior as a specification.
A cherry on top: real-world examples guaranteed 🤩
Szymon will present a practical methodology for verifying business logic equivalence during rewrites, focusing on isolating side effects and leveraging existing system behavior as a specification.
A cherry on top: real-world examples guaranteed 🤩
March 9, 2025 at 6:52 PM
Shoutout to @szymonfiedler.bsky.social!
Szymon will present a practical methodology for verifying business logic equivalence during rewrites, focusing on isolating side effects and leveraging existing system behavior as a specification.
A cherry on top: real-world examples guaranteed 🤩
Szymon will present a practical methodology for verifying business logic equivalence during rewrites, focusing on isolating side effects and leveraging existing system behavior as a specification.
A cherry on top: real-world examples guaranteed 🤩
Great time at the Ruby Community Conference here in Krakow, Poland.
Thanks to the organizers, speakers and sponsors 🙏
Thanks to the organizers, speakers and sponsors 🙏
March 1, 2025 at 8:37 AM
Great time at the Ruby Community Conference here in Krakow, Poland.
Thanks to the organizers, speakers and sponsors 🙏
Thanks to the organizers, speakers and sponsors 🙏
Reposted by Andrzej Krzywda
#webdevelopment #ruby
There is a 6 minutes podcast that i share with some junior developers once per few months. I figured out i should share it there too: open.spotify.com/episode/5mX2...
Main wisdom of that one: "don't attach emotionally with your code".
There is a 6 minutes podcast that i share with some junior developers once per few months. I figured out i should share it there too: open.spotify.com/episode/5mX2...
Main wisdom of that one: "don't attach emotionally with your code".
TDD, spikes and mutation testing
Andrzej on Software · Episode
open.spotify.com
January 16, 2025 at 1:37 PM
#webdevelopment #ruby
There is a 6 minutes podcast that i share with some junior developers once per few months. I figured out i should share it there too: open.spotify.com/episode/5mX2...
Main wisdom of that one: "don't attach emotionally with your code".
There is a 6 minutes podcast that i share with some junior developers once per few months. I figured out i should share it there too: open.spotify.com/episode/5mX2...
Main wisdom of that one: "don't attach emotionally with your code".
Reposted by Andrzej Krzywda
just published a new blog post about Rails Event Store and how you can easily integrate it in a new or existing app
from ActiveRecord callbacks to a pub sub system!
xamey.xyz/post/?sha=2c...
@lukaszreszke.bsky.social @andrzejkrzywda.bsky.social
from ActiveRecord callbacks to a pub sub system!
xamey.xyz/post/?sha=2c...
@lukaszreszke.bsky.social @andrzejkrzywda.bsky.social
Xamey
Senior Software Developer
xamey.xyz
January 15, 2025 at 2:04 PM
just published a new blog post about Rails Event Store and how you can easily integrate it in a new or existing app
from ActiveRecord callbacks to a pub sub system!
xamey.xyz/post/?sha=2c...
@lukaszreszke.bsky.social @andrzejkrzywda.bsky.social
from ActiveRecord callbacks to a pub sub system!
xamey.xyz/post/?sha=2c...
@lukaszreszke.bsky.social @andrzejkrzywda.bsky.social
Advent of Code, day 4
I went with graph traversal algorithm
I went with graph traversal algorithm
December 8, 2024 at 6:47 PM
Advent of Code, day 4
I went with graph traversal algorithm
I went with graph traversal algorithm
Catching up with Advent of Code
Day 3 is such a lovely opportunity to use parsing with Ruby Parslet gem.
It has a nice combination of being a DSL and still writing Ruby.
Day 3 is such a lovely opportunity to use parsing with Ruby Parslet gem.
It has a nice combination of being a DSL and still writing Ruby.
December 7, 2024 at 4:45 PM
Catching up with Advent of Code
Day 3 is such a lovely opportunity to use parsing with Ruby Parslet gem.
It has a nice combination of being a DSL and still writing Ruby.
Day 3 is such a lovely opportunity to use parsing with Ruby Parslet gem.
It has a nice combination of being a DSL and still writing Ruby.
To my chess fans
IM Levy (Gotham Chess) got a mental breakdown after losing to me
youtu.be/3yYuNefwxRA?...
IM Levy (Gotham Chess) got a mental breakdown after losing to me
youtu.be/3yYuNefwxRA?...
Levy Has A Mental Break Down
YouTube video by Gotham Games
youtu.be
December 4, 2024 at 12:14 AM
To my chess fans
IM Levy (Gotham Chess) got a mental breakdown after losing to me
youtu.be/3yYuNefwxRA?...
IM Levy (Gotham Chess) got a mental breakdown after losing to me
youtu.be/3yYuNefwxRA?...
Reposted by Andrzej Krzywda
Annual reminder on how to get anything done: blog.arkency.com/2015/03/how-...
December 3, 2024 at 3:48 AM
Annual reminder on how to get anything done: blog.arkency.com/2015/03/how-...
Advent of Code
with Ruby
with DDD
sounds like overkill
still, seriously considering
with Ruby
with DDD
sounds like overkill
still, seriously considering
November 29, 2024 at 6:59 PM
Advent of Code
with Ruby
with DDD
sounds like overkill
still, seriously considering
with Ruby
with DDD
sounds like overkill
still, seriously considering