Software Engineer

I'm Lucas, helping companies worldwide.

Detail-oriented engineer with a diverse background - from start-ups to medium-sized organizations. I thrive on new challenges, whether it involves tackling a fresh project, leading teams, or assuming a different role. Also a co-organizer of Kraków Ruby Users Group.

Say Hello GitHub

Featured Projects

Compartment

Go · macOS, Linux, Windows (WSL2)

Your assistant for spinning up local services for development without port conflicts. Start multiple PostgreSQL versions, Redis instances, and more - all running simultaneously with DNS resolution.

Docker PostgreSQL DNS CLI

go-pty

Go · macOS, Linux

A process manager that runs commands from a Procfile, each in its own pseudoterminal (PTY). Every process gets a real terminal, so you can attach to any running process and use interactive debuggers and REPLs directly.

Go CLI

Blog

All posts →

Mar 05, 2026 Rails

Running Rails system specs in WSL 2 using Chrome on Windows

Learn how to run Rails system specs with Capybara and Selenium across the WSL 2 and Windows network boundary.

Feb 02, 2026 Ruby

Introduction to fibers

Learn how Ruby Fibers enable efficient concurrent I/O without the overhead of threads or complexity of mutexes.

Oct 06, 2025 rails

Recreating database with Rails 8

How to recreate your database in Rails 8 with the updated `rails db:migrate` command

Sep 15, 2025 postgresql

3 most common PostgreSQL VACUUM parameters explained

Learn about the 3 most common PostgreSQL VACUUM parameters and how to use them effectively.

May 07, 2025 rails postgresql

Preloading data with custom scopes and counting association records in Rails

Learn how to preload data with custom scopes and count association records in Ruby on Rails.

Setup

Inspired by Wes Bos and his project, uses.tech.

Laptop: 2020 M1 MacBook Air for work. Portable and still powerful enough to not compensate on battery life.
Desktop: Self-built PC with an AMD Ryzen 5 5600 CPU, 32GB of RAM, 512GB SSD and Radeon RX 6600. All packed in compact Geeek A30 V2 case. Used for gaming and tinkering (as SFF addict, upgrading never stops).
Phone: Google Pixel 7. Exceptional camera combined with pure Android experience.
Dev tools: I breathe the command line - Neovim, tmux and claude code is my combo to get things done.
Besides that, I use Google Chrome for browsing the web and Bitwarden for password management.