Patrik Bóna, Developer in Bratislava, Bratislava Region, Slovakia
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Patrik Bóna

Verified Expert  in Engineering

Ruby on Rails Developer

Bratislava, Bratislava Region, Slovakia
Toptal Member Since
July 15, 2014

Patrik is a senior, full-stack web developer focused on Ruby on Rails. He has worked on projects from scratch and on mature production applications and has extensive experience integrating with third-party APIs. Patrik prefers the Rails way and enjoys working with Hotwire.



Preferred Environment

Basecamp, Ruby, Ruby on Rails (RoR), Hotwire

The most amazing...

...role I've ever had was working as sole developer for more than three years, improving the product and helping grow the company, which was eventually acquired.

Work Experience

Fullstack Engineer

2014 - PRESENT
Procore (via Toptal)
  • Refactored our image processing system which converts tens of thousands images and PDFs daily.
  • Created non-trivial Dropbox and Box integration for one of our products.
  • Created tiling functionality for image processing and the applications which display technical drawings.
  • Improved UX during drawing upload process on one of our products.
  • Hunted and fixed bugs and errors on one of our products.
  • Reduced a number of bugs and improved the stability of the system.
Technologies: Sidekiq, Ruby on Rails (RoR), Test-driven Development (TDD), Ruby, JavaScript, Full-stack


I've built a warehouse system for a pool company. They track all stock item arrivals and removals in it. It is split into two parts. One is for warehouse workers, and another is for admins and ordinary users. Each part has a different authentication mechanism. Thanks to this system, they can track each stock item change. They can see who did the change and when it was done.

Ski School

A Ruby on Rails application for Ski school management. I created it in 2014, and it is still being used and running on the latest versions of Ruby and Ruby on Rails. The primary use case is managing clients, ski instructors, and booking skiing lessons.

A simple to-do lists application was created with Ruby on Rails and Hotwire. It is one of my toy projects. It demonstrates how you can make an Ajax-heavy application with almost no JavaScript code. I created the application with server-generated JavaScript responses, but I migrated it to Hotwire shortly after release.

Stimulus Search
Another one of my toy projects. This application demonstrates how to create an autocomplete functionality with Stimulus. The main functionality was extracted from a real-world project I worked on.
1999 - 2004

Master's Degree in Computer Science

Technical University of Košice - Košice (Slovakia)


Sidekiq, Stripe API, jQuery


Basecamp, RSpec, Git


Ruby on Rails (RoR), Bootstrap, Tailwind CSS, Stimulus


Ruby, CoffeeScript, JavaScript


Testing, Test-driven Development (TDD)




Full-stack, Hotwire

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