Ruby on Rails Developer - Senior

Ruby on Rails Developer - Senior We are looking for a Senior Ruby Developer to join a highly experienced engineering team working on complex, data-intensive systems. You will help design and build reliable, fault-tolerant solutions. Overview: We are looking for a Senior Ruby Developer to join a highly experienced engineering team working on complex, data-intensive systems. You will help design and build reliable, fault-tolerant solutions, take ownership of their performance in production, and solve challenging data and scalability problems. Purpose of the role: Design and improve scalable Ruby services for high-load, data-intensive systems. You will own solutions from implementation to production, troubleshoot complex issues, optimize application and database performance, and contribute to technical decisions and engineering practices. Key responsibilities: Work in a fully agile environment with senior engineers and product managers Participate in designing fault-tolerant, highly available and optimized solutions Monitor and optimize your services in production for excellence Research and develop new technologies and tools Collaborate with other teams - product, infrastructure and business Required Experience: Minimum 5-year experience in software development Solid Ruby programming skills Hands-on experience with data-intensive applications development & performance tuning Experience in developing complex solutions from scratch Strong SQL skills and solid understanding of relational databases, with the ability and curiosity to investigate complex data issues, analyze large datasets, and perform root-cause analysis Deep data structures, OOP, and algorithms knowledge Good communication skills Nice to have: Familiarity with ClickHouse Familiarity with AI-powered developer tools and practical experience integrating them into daily development workflows Experience with Kafka Ability to implement space and time-efficient algorithms and understand which one is preferable and when Readiness to learn other programming languages (e.g. Golang, Scala) Familiarity with SRE practices Familiarity with cloud native technologies (e.g. k8s, Helm, Prometheus) Our Benefits: Private health insurance Sports benefits Comprehensive Mental Health Program Free English lessons (online) Local language courses Paid time off Maternity leave support Referral program rewards Upskilling, internal workshops, and participation in professional conferences and corporate events Department Data Office Role Software Engineer - Reporting and Analytics Locations Warsaw, Poland, Belgrade, Serbia, Cyprus, Poznan, Poland, T'bilisi, Georgia Remote status Fully Remote Employment type Full-time Applicant tracking system by Teamtailor