Lead - Ruby On Rails Developer

At Square One Poland we link IT experts with the business. With over 25 years of experience, we specialize in recruitment processes on a global scale. Despite years of experience, we still have a startup DNA and this is our advantage. Our offices are located in London and Warsaw, however, we can reach clients from all over the world, from start-ups to big worldwide corporations.

• Strong product thinking and customer empathy: ability to understand customer needs, question requirements, and build features that deliver value rather than just implement designs
• Demonstrated technical initiative: track record of improving requirements, proposing solutions, and taking ownership of outcomes rather than just completing tasks
• Strong experience in modern web development with React and TypeScript
• Experience building backend services and APIs - Ruby/Rails
• Demonstrated ability to build full-stack customer-facing web applications
• Strong problem-solving skills and ownership mindset
• Ability to write high-quality, well-tested code independently
• Willingness to deeply learn and use Client's product to understand customer experience
• Good communication and cross-functional collaboration skills

• Design and develop modern web applications using frontend technologies (React, TypeScript) and backend technologies (Ruby/Rails)
• Build and maintain scalable backend services and APIs supporting customer-facing applications
• Develop end-to-end, full-stack solutions with a strong focus on user experience
• Understand customer needs and translate them into valuable product features, going beyond simply implementing requirements
• Proactively suggest improvements, technical solutions, and optimizations to existing features and processes
• Take ownership of delivered solutions across the full development lifecycle — from concept to deployment and maintenance
• Write high-quality, clean, and well-tested code
• Independently solve technical problems and make sound engineering decisions
• Collaborate closely with cross-functional teams, including Product Managers, Designers, and other stakeholders
• Continuously learn and deeply understand the product to better align solutions with user needs
• Participate in code reviews and contribute to maintaining high engineering standards within the team