Senior Ruby on Rails Engineer

Workster is partnering 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.

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Responsibilities

• Role 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
• Cursor, Claude Code and ChatGPT Direct collaboration with experienced engineering leadership and the chance to influence technical decisions

Requirements

• The company’s products include adult/NSFW content, so candidates must be fully comfortable working on them.
• 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

Benefits

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