Senior Ruby on Rails Engineer

David Kennedy Recruitment is working with a fast-growing AI technology company serving millions of users worldwide that is seeking to onboard a Senior Ruby on Rails Engineer to join their R&D / Engineering team. This is a hands-on individual contributor role, helping design, build and scale core applications while working alongside the CTO, Tech Lead, Product Managers and SREs. The company's products include adult/NSFW content, so candidates must be fully comfortable working on them. Position: Senior Ruby on Rails Engineer Location: Europe, Remote Employment type: B2B engagement DUTIES AND RESPONSIBILITIES: • Design, develop and maintain scalable backend applications using Ruby on Rails • Collaborate with Product Managers to review requirements and translate specifications into technical solutions • Prepare technical integration plans, development breakdowns and effort estimates • Implement new features and improve existing platform functionality • Write clean, maintainable, well-tested production code • Take part in pull requests, peer code reviews and testing • Troubleshoot application issues and improve reliability, performance and scalability • Contribute to technical decision-making and product roadmap discussions • Experiment with technologies and approaches that improve product functionality and user experience • Work with distributed engineering, infrastructure and product teams REQUIREMENTS: • 5+ years' commercial experience as a Backend or Full-Stack Software Engineer • Strong, recent hands-on Ruby on Rails experience in production • Ability to independently design and implement complex backend features • Experience on applications serving thousands or more monthly active users, with an understanding of building reliable, scalable systems • Experience in technology scale-ups, startups or similarly agile environments, comfortable with changing priorities and tight deadlines • Proven ability to take features from requirements through development, testing and production • Excellent spoken and written English, and comfortable working with international remote teams • Based in Europe, with CET ±3 hours working overlap • Fully comfortable working on AI companionship products involving uncensored and NSFW content BENEFITS: • 100% remote working, with a B2B contract • 20 working days of paid time off annually • Annual company gathering • Health and wellbeing support • Learning and professional development budget • Company laptop and equipment support • Access to AI development tools, including Cursor, Claude Code and ChatGPT • Direct collaboration with experienced engineering leadership and the chance to influence technical decisions • And many more!!! Originally posted on Himalayas