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Senior Ruby on Rails Engineer

David Kennedy RecruitmentLondon🇬🇧United KingdomPosted 9 Oct 2026

Why This Role Stands Out

This remote Senior Ruby on Rails Engineer role offers you the chance to shape the future of a rapidly expanding AI technology company, impacting millions of users globally. You'll thrive here if you're an experienced engineer eager to design and scale core applications, collaborating closely with leadership in a dynamic, innovative environment. Apply today to join this exciting venture and contribute to cutting-edge technology.

Quick Overview

Seniority
Mid Senior
Work mode
Remote
Location
London, United Kingdom
Posted
9 hours ago
RubyAgileRails

Job Description

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!!!