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!!!