Principal Software Engineer (Ruby Expert)
Sigma Software · Warsaw, Masovian Voivodeship, Poland · On-site
Posted Sep 1, 2026
Sign up free: we match you to jobs like this, tailor your application and fill the form. 2 free applications every day.
Architect and implement scalable, high-performance software solutions using Ruby and Ruby on Rails
Lead the design and development of new features and products, ensuring code quality and best practices
Collaborate with cross-functional teams to define and implement technical strategies
Mentor and guide junior developers, fostering a culture of continuous learning and improvement
Conduct code reviews and provide constructive feedback to team members
Optimize existing systems for improved performance and scalability
Contribute to the evolution of our technology stack and development processes
Participate in technical decision-making and help set the direction for our engineering efforts
Stay up-to-date with emerging technologies and industry trends, recommending innovations when appropriate
Troubleshoot and resolve complex technical issues in production environments
Expert-level proficiency in Ruby and strong knowledge of Ruby on Rails framework
8-10+ years of software development experience, with a proven track record of leading complex projects
Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent experience)
Strong experience with web development technologies (HTML, CSS, JavaScript)
Proficiency in database systems (e.g., PostgreSQL, MySQL) and version control systems (e.g., Git)
Deep understanding of software design patterns, principles, and best practices
Experience with test-driven development (TDD) and automated testing frameworks
Knowledge of scalable and distributed systems architecture
Familiarity with cloud computing platforms (e.g., AWS, Azure, GCP)
Strong problem-solving skills and ability to architect complex software solutions
Excellent communication and leadership abilities, with experience mentoring junior developers
Experience working with Agile methodologies
Ability to balance technical leadership with hands-on coding
Passion for staying current with emerging technologies and industry trends
WILL BE A PLUS
вввва
ввв
паа
PERSONAL PROFILE
олллл
лоаолал
оаоал