Senior Ruby on Rails Engineer — Remote, EU, Scale AI

David Kennedy Recruitment; United States; Remote; USD 79,000 - 124,000; Full time

Benefits offered by this job

Annual company gathering

Health and wellbeing support

Learning and professional development

Company laptop and equipment

Access to AI development tools

Job summary

David Kennedy Recruitment partners with a fast-growing AI technology company serving millions of users worldwide to hire a Senior Ruby on Rails Engineer for the R&D / Engineering team.

This hands-on role is an IC position, collaborating with the CTO, Tech Lead, Product Managers and SREs to design, build and scale core applications.

Fully remote, Europe-based, with a B2B engagement and opportunities to influence technical decisions while delivering robust, scalable backend solutions.

Qualifications

• 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

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

Skills

Ruby on Rails

Backend engineering

System design

English communication

Distributed teams

Remote work

Tools

Cursor

Claude Code

ChatGPT

Job description

David Kennedy Recruitment partners with a fast-growing AI technology company serving millions of users worldwide to hire a Senior Ruby on Rails Engineer for the R&D / Engineering team.

This hands-on role is an IC position, collaborating with the CTO, Tech Lead, Product Managers and SREs to design, build and scale core applications.

Fully remote, Europe-based, with a B2B engagement and opportunities to influence technical decisions while delivering robust, scalable backend solutions.