
Bartosz Szarłowicz
Fullstack Ruby on Rails developer
Preview CV
Fullstack Ruby on Rails developer
Preview CV795 contributions in the last year
Fullstack Ruby on Rails Developer · Dec 2025 – Present
11 months and counting
activenow.ioFullstack Ruby on Rails Developer · Oct 2023 – Dec 2025
2 years 3 months
smartshack.plFullstack Ruby on Rails Intern · Aug 2023 – Sep 2023
2 months
smartshack.plCracow University of Technology · Mar 2025 – Jun 2026
Major in Cybersecurity
Cracow University of Technology · Sep 2021 – Jan 2025
Computer Engineering
$ rspec bartosz_spec.rb
Bartosz
✓ships large features end to end
✓migrates schemas with zero downtime
✓moves legacy UI to a new stack
✓fixes security issues on live projects
✓keeps data consistent under load
✓builds reusable design systems
✓resolves production issues fast
✓runs projects directly with clients
8 examples, 0 failures

“Thank you very much for creating a professional email signature for my company and for your support in building my website. If anyone is starting a new business or would like to update their website, email signature, or applications, I highly recommend Bartek. He has a very client-oriented approach and completes every task with great precision and care.”
Michael Lysokon · Mac4Less · Client · May 2026
★★★★★
“Working with him at university has been an absolute pleasure. He is a highly motivated, reliable, and hardworking individual who always brings great energy to the team. He possesses excellent communication skills and a unique ability to solve problems under pressure. Any team would be lucky to have him!”
Marek Kurańda · University Colleague · May 2026
★★★★★
“Bartek is a great colleague to work with. I value his professionalism and accuracy, pair-programming, consultations, and constructive feedback most in our collaboration. And we've been working on numerous projects together for over two years.”
Michał Sieradzki · Coworker · Feb 2026
★★★★★
“I've worked with Bartosz on several projects, and it's always been a pleasure. He's skilled, professional, and brings a positive attitude to his work. Collaborating with him is straightforward and enjoyable. I'd highly recommend working with him!”
Rafał Przybysz · Friend · Dec 2025
★★★★★
“I have worked with Bartosz on many projects, and he has always been a great help. When I was new and didn’t know what to do, he patiently taught me and guided me through the tasks. He has a lot of knowledge and can handle several things at once without any trouble. He is very competent and stays calm even in busy situations. Bartosz is a reliable and skilled colleague who makes working together easier and more enjoyable. I am glad to have him on the team and appreciate all his support.”
Bartek Sosnowicz · Coworker · Dec 2025
★★★★★
“I've had the pleasure of studying and working alongside Bartosz, and I can honestly say that collaborating with him is always a great experience. He is professional, reliable, and brings a positive energy to every project :)”
Maciek Walczak · Coworker · Nov 2025
★★★★★
3 years 3 months as a developer