At least 3 years of professional experience in programming Rails applications Advanced knowledge of Ruby and Rails Practical understanding of Object-Oriented Programming Excellent oral and written communication skills Experience working with high-availability systems Experience with CI/CD best practices Working experience with Sidekiq Practical understanding of SOLID principles Interest in writing clean, extendable code Fluent in Polish and English Strong passion for using AI technologies Curiosity and drive to stay ahead of emerging AI/ML technologies