Ruby on Rails Experts · Since 2006
We rescue, modernize & scale Rails applications
Deep expertise in Domain-Driven Design, event sourcing, and legacy code modernization. We go beyond code - we understand your business. We share our know-how through world-class Ruby on Rails education.
Services
Use our skills to modernize legacy code, enable growth, and preserve stability.
Ruby on Rails Development
We save legacy Ruby on Rails applications from collapsing and improve them to support your business growth. Whether it is hard to add new functionality or application needs performance optimization, we'll get it back on the right track and support you with further steps.
Learn more →Ruby on Rails Upgrades
Keeping your Rails app up-to-date is crucial for security and performance. We handle seamless migrations to the latest Ruby and Rails versions, ensuring minimal downtime and maximum reliability.
Learn more →Workshops & Mentoring
As experts in software development, we share our knowledge and experience through professional workshops & mentoring, helping teams better understand, design, and develop complex systems.
Event Storming Workshop → Rails + Domain Driven Design Workshop → Hotwire Workshop → Code Mentoring →Frontend development
We craft modern, responsive UIs that integrate seamlessly with Rails backends. Our expertise covers both React and Hotwire, allowing us to build interactive applications efficiently. We also help businesses transition from React to Hotwire, simplifying frontend architecture while maintaining a great user experience.
Learn More →Proven results, trusted by teams worldwide
The Arkency team comprises professionals at the highest level.
Elad Moshe
Director of Engineering
🇺🇸 USA
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It is rare to find a technical partner where the collaboration feel like an extension of our own company.
Patrick Borre
CEO
🇩🇰 Denmark
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Arkency has an impressive depth of knowledge and expertise.
Scott Ellard
Technical Director
🇬🇧 UK
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Arkency has helped a cargo handling company introduce DDD and event sourcing as an app architecture. The team has provided code, features, and major refactorings within the client's 12-year-old codebase.
Tim Chang Möhrke
Team Lead Software Eng, CHI Deutschland
🇩🇪 Germany
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Arkency exceeds expectations and doesn't leave unfinished topics behind.
Krzysztof Bartnik
CEO, Imker.pl
🇵🇱 Poland
The caliber of engineers at Arkency is unmatched. We had high expectations going into the engagement and the Arkency team almost immediately exceeded them.
Anonymous
CEO & Co-Founder, FinTech Company
🇺🇸 USA
Case Studies
Real-world examples of how we’ve tackled challenges and delivered effective solutions.
Trezy Fintech
How Trezy Transformed Financial Data Processing with Arkency's Event-Driven Approach.
Learn more →Billetto Event Platform
Discover how Billetto scaled faster, deployed instantly, and thrived with Arkency's architectural expertise.
Learn more →Legacy Ecommerce E-commerce
From unstable deployments and security vulnerabilities to zero downtime and 3-minute rollbacks.
Learn more →Team
We are a team of experienced developers who combine deep technical expertise with a business-driven approach.
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Andrzej Krzywda
CEO
Founder of Arkency, software architect specializing in DDD, CQRS, and event sourcing. He authors books and courses, helping companies build scalable applications.
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Marcin Domański
Fullstack Developer
Senior Fullstack Developer.
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Jakub Kosiński
VP of Context Switching
Senior Fullstack Developer. Helping businesses understand their needs & grow using web software solutions.
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Tomasz Patrzek
Fullstack Developer
Senior Fullstack Developer.
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Szymon Fiedler
VP of Memes
Strategic Problem–Solver for Complex Software Challenges. Senior Software Engineer.
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Mirosław Pragłowski
Fullstack Developer
Senior Fullstack Developer.
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Jakub Rozmiarek
Fullstack Developer
Senior Engineer, expert in high-traffic web apps, online payments, and legacy refactoring.
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Maciej Korsan
VP of AD⚡️HD
Human-browser relations 🤖 Seasoned UI Developer, conference speaker, Hotwire enthusiast.
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Piotr Romańczuk
Fullstack Developer
Senior Developer, DevOps specialist. Interested in Domain Driven Design.
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Piotr Jurewicz
Fullstack Developer
Senior Business Fullstack Engineer.
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Łukasz Reszke
Fullstack Developer
Senior Software Developer, Domain-Driven Design and EventStorming passionate.
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Tomek Stolarczyk
Fullstack Developer
Senior Software Developer, Domain-Driven Design and EventStorming passionate.
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Paweł Dąbrowski
Solutions & Content Alchemist
Senior Software Engineer and AWS enthusiast, crafting code and content alike.
Community
We proudly contribute to the Ruby on Rails community, sharing our expertise through blog posts, conference talks, and active open-source participation.
Arkency Blog
We've been doing this since 2012, breaking down Rails, sprinkling in DDD, and helping you conquer those day-to-day coding hurdles.
Rails Event Store
The open-source event store for Ruby & Rails.
Arkency actively maintains and develops Rails Event Store, a robust library for publishing, consuming, storing, and retrieving events. Simplify your event-driven architecture, decouple business logic, and gain full control over event flow in your application.
Learn more →Conference Talks
Big event or cozy meetup, we're always up for sharing our Rails and DDD know-how with fellow enthusiasts.
Upcoming:
Past:
Full archive of the talks soon!-
wroclove.rb 18.04.2026
Lightning talk: Knowledge grpahs
Piotr Jurewicz -
RBQ 26-27.03.2026
Would Your Tests Catch This Bug? A Mutation Testing Story
Szymon Fiedler -
Kraków Ruby Users Group 12.03.2026
15 years of Rails with Domain Driven Design - lessons learnt
Andrzej Krzywda -
Kraków Ruby Users Group 12.03.2026
Rails deployment buffet: picking your Docker dish
Paweł Dąbrowski -
RUBYCONF THAILAND 31.01-01.02.2026
15 years of Rails with Domain Driven Design - lessons learnt
Andrzej Krzywda -
EuRuKo 18-19.09.2025
Rewrite with confidence: validating business rules through isolated testing
Szymon Fiedler -
RubyConf India 12-13.09.2025
15 years of Rails with Domain Driven Design - lessons learnt
Andrzej Krzywda -
DRUG 21.07.2025
Dynamic Consistency Boundary — breakthrough or mirage?
Paweł Pacana -
DRUG 21.07.2025
Residues on Rails
Andrzej Krzywda -
ParisRb.new 01.07.2025
Storing Data as sequence of facts in Ruby on Rails
Łukasz Reszke -
ParisRb.new 01.07.2025
15 years with Rails and DDD
Andrzej Krzywda -
DDD Europe 04-06.06.2025
The Anatomy of Business Conditions
Łukasz Reszke -
Chicago Ruby 04.06.2025
15 years of Rails with Domain Driven Design - lessons learnt
Andrzej Krzywda -
Craft IT 31.05.2025
The Anatomy of Business Conditions
Łukasz Reszke -
DRUG #139 19.05.2025
Processes, threads, event loops
Paweł Pacana -
London Ruby User Group 14.04.2025
From React to Hotwire: an unexpected journey
Maciej Korsan -
wroclove.rb 11-13.04.2025
Rewrite with confidence: validating business rules through isolated testing
Szymon Fiedler -
wroclove.rb 11.04.2025
From Static to Reactive: Hotwire Basics for Rails Devs [Workshop]
Łukasz Reszke, Maciej Korsan -
online 31.03.2025
Rescuing Rails Applications: To Rewrite or Modernize?
Łukasz Reszke -
DRUG #138 17.02.2025
Metaprogramming in Service of Legacy Code
Paweł Pacana -
online 30.01.2025
From React to Hotwire: an unexpected journey
Maciej Korsan -
online 30.10.2024
10 Arkency lessons from Rails apps for 2025
Łukasz Reszke