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:
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Design, develop and maintain scalable backend applications using Ruby on Rails

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Collaborate with Product Managers to review requirements and translate specifications into technical solutions

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Prepare technical integration plans, development breakdowns and effort estimates

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Implement new features and improve existing platform functionality

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Write clean, maintainable, well-tested production code

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Take part in pull requests, peer code reviews and testing

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Troubleshoot application issues and improve reliability, performance and scalability

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Contribute to technical decision-making and product roadmap discussions

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Experiment with technologies and approaches that improve product functionality and user experience

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Work with distributed engineering, infrastructure and product teams

REQUIREMENTS:
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5+ years' commercial experience as a Backend or Full-Stack Software Engineer

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Strong, recent hands-on Ruby on Rails experience in production

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Ability to independently design and implement complex backend features

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Experience on applications serving thousands or more monthly active users, with an understanding of building reliable, scalable systems

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Experience in technology scale-ups, startups or similarly agile environments, comfortable with changing priorities and tight deadlines

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Proven ability to take features from requirements through development, testing and production

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Excellent spoken and written English, and comfortable working with international remote teams

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Based in Europe, with CET ±3 hours working overlap

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Fully comfortable working on AI companionship products involving uncensored and NSFW content

BENEFITS:
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100% remote working, with a B2B contract

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20 working days of paid time off annually

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Annual company gathering

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Health and wellbeing support

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Learning and professional development budget

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Company laptop and equipment support

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Access to AI development tools, including Cursor, Claude Code and ChatGPT

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Direct collaboration with experienced engineering leadership and the chance to influence technical decisions

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And many more!!!