Senior Ruby on Rails Engineer | Integrations | Outside IR35 | Remote Ruby | Rails | GraphQL | API Integrations | Remote-first | Product Development SR2 is working with one of the UK''s most exciting cybersecurity scale-ups, on the hunt for a Senior Ruby Developer to help evolve their industry-leading platform. You''ll be joining a collaborative, engineering-led culture where product thinking, ownership, and clean code matter. This is a contract role, open to UK-based candidates working fully remotely or from their HQ. The company is helping organisations worldwide tackle real-world cyber threats by empowering teams with hands-on, constantly evolving training environments - and they''re scaling fast.Skills/Experience:Strong hands-on experience with Ruby on Rails in production SaaS platformsSolid understanding of API integrations, including RESTful APIs, OAuth, and webhook handlingExperience working with enterprise platforms.Confident in background job processing (Sidekiq/Resque) and asynchronous servicesFamiliarity with containerisation and cloud-native development (Docker, AWS, etc.)Good understanding of secure coding practices when working with external systemsA collaborative mindset with strong communication skills for working with cross-functional teamsBonus - any Frontend experience is desirble but not essential.The Details:Contract role - Outside IR35Fully remote6 months1-stage interview processIf you''re a Back End-focused Ruby developer who enjoys solving technical ..... full job details .....