My name is Paweł. I'm a CTO at Visuality, consultant, and have been a full-stack developer since the 90s. I'm an author of multiple articles showing a creative approach to using Ruby on Rails. Currently, I'm excited about AI's potential and cross-tech discoveries. I'm a frequent speaker at conferences and meetups and a big supporter of the Ruby and Rails scene. I build games for fun.

Find me at my GitHub profile and on my projects:

• Hifumi - my open source product, hosted at hifumi.dev and open sourced at github.com/pstrzalk/hifumi-dev
• Tetris on Rails - the game of Tetris built with Ruby on Rails and Hotwire
• Multiplayer game on Rails - a real-time, multiplayer game engine on Rails
• MCP on Rails - the Model Context Protocol with Ruby on Rails
• MCP Template - a starting point for MCP servers in Rails apps
• Event Sourcing on Rails - Event Sourcing with Ruby
• ServerEngine on Rails - running a Rails server with ServerEngine
• DDD in Ruby on Rails - Domain-Driven Design building blocks in Rails
• Embeddings - LLM embeddings and vector search in Ruby
• AI Interface - adding an AI interface to a Rails application

I have given a number of presentations at meetups and conferences. Some of them travelled to more than one event, so they are grouped by talk with a link to each recording:

MCP & OAuth on Rails: Building a Production-Ready AI App

• Tropical on Rails 2026, São Paulo, Brazil

Make Rails AI-Ready by Design with the Model Context Protocol

• Rails World 2025, Amsterdam

The Joy of Creativity in the Age of AI

• Ruby Community Conference 2025
• Berlin Ruby Meetup 2025
• Balkan Ruby 2025 (given as "Creativity - The only skill you need in the long term")

AI Interface in 5 Minutes

• SF Ruby Conference 2025

Rails as a Real-Time, Multiplayer Game Engine

• Rails World 2024, Toronto

Rails Permanent Job, build a Ruby on Rails server using ServerEngine

• Ruby Community Conference 2024

Introduction to Event Sourcing. How to use it with Ruby.

• wroc_love.rb 2022

More on my RubyEvents profile.

I also run hands-on workshops, helping teams make their Rails applications AI-native:

Workshop: Model Context Protocol in Ruby on Rails

• Ruby Community Conference Winter Edition 2026, Poland

Building a Production-Ready AI App: MCP & OAuth on Rails

• wroclove.rb 2026, Poland

I write on the Visuality blog. Grouped by topic:

Software development in the AI era (2026)

• Why Scrum Stops Working in the AI Era
• Pulse: Software Development Without Sprints
• Product-Centered Team for the AI Era
• From Vibes to Process: AI Coding in Production Codebases

Model Context Protocol with Rails (2025)

• Ruby on Rails and Model Context Protocol
• MCP Server with Rails and FastMCP
• MCP Server with Rails and ActionMCP
• MCP Client in Rails using ruby-mcp-client gem
• MCP Template for Rails applications

LLMs in Ruby (2024)

• LLM Embeddings in Ruby
• Vector Search in Ruby

Domain-Driven Design in Ruby on Rails (2022-2023)

• Introduction to DDD in Ruby on Rails
• Value Object
• Entity
• How to design an entity
• Aggregate
• Example Application
• Repository
• Bounded Context

Other

• Tetris on Rails
• How to rescue a transaction to roll back changes?
• Safe data migrations in Rails