Senior Software Engineer (Lisbon based, relocation to Portugal provided)

At Catawiki, we power a marketplace where extraordinary objects change hands every day — from iconic sports memorabilia to rare collectibles. With 110,000\+ curated items auctioned weekly and 25M\+ objects sold, we’re building the world’s leading destination for special objects. **What you’ll do** You’ll design, build and scale high\-performance microservices (mainly in Ruby) that serve a high\-traffic platform. Working in an autonomous, cross\-functional team, you’ll ship features, run experiments, monitor performance and continuously improve reliability and scalability. **What you bring** * 7\+ years’ experience in software development (strong OOP background) * Experience building and deploying scalable, highly available backend services * Comfortable in cross\-functional teams and mentoring others * Strong ownership mindset and product awareness * Open to learning Ruby if not already experienced **How we work** Infrastructure as Code, Continuous Delivery, peer reviews, A/B testing and strong observability. We iterate fast, learn quickly and take ownership. **Why Catawiki** Make visible impact at scale in a diverse, international team (800\+ colleagues, 60\+ nationalities). Hybrid setup, strong L\&D focus, relocation support, and unique perks. Interested? Apply with your English CV.