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!!!