Senior Ruby On Rails Engineer (Remote) - Remote

Location: Fully remote – Europe (CET ±3 hours)
Salary: €75,000–€105,000/year, depending on location and experience
Contract: B2B preferred, flexible
Experience: 5+ years
Important: Must be comfortable working with explicit NSFW content.

We’re looking for an experienced Senior Ruby on Rails Engineer to join a fast-growing AI technology company behind an AI companionship platform used by millions worldwide.

You’ll work on scalable, AI-powered applications, developing new features and improving existing functionality alongside the CTO, Tech Lead and wider engineering team.

This is a hands-on individual contributor role for someone who enjoys coding, taking ownership and delivering high-quality solutions in a fast-moving environment.

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

• Build new features and improve existing platform functionality.

• Work with Product Managers to translate requirements into technical solutions and estimate development efforts.

• Write clean, maintainable, well-tested production code.

• Participate in code reviews, testing and technical decision-making.

• Troubleshoot issues and improve application performance, reliability and scalability.

• Collaborate with distributed engineering, product and infrastructure teams.

• 5+ years of commercial experience in backend or full-stack software engineering.

• Strong, hands-on Ruby on Rails experience, ideally recent and in production.

• Experience building and scaling production applications with real users.

• Ability to take ownership of features from requirements through development, testing and deployment.

• Previous experience in a startup, scale-up or similarly fast-paced environment.

• Strong problem-solving skills and the ability to balance code quality with delivery speed.

• Excellent English and experience working with international teams.

• Full comfort working with uncensored AI companionship products and explicit NSFW content.

Ruby on Rails, PostgreSQL, Redis, Hotwire (Turbo and Stimulus) and Tailwind CSS.

• Experience with generative AI, LLMs, NLP or machine learning.

• Familiarity with modern Rails development practices and AI-assisted coding tools.

• Experience working with globally distributed engineering teams.

• 100% remote working.

• Competitive salary, depending on location and experience.

• Direct collaboration with senior engineering leadership.

• Opportunity to influence technical decisions and product development.

• 20 days of paid annual leave.

• Learning and development budget, health and wellbeing support.

• Company laptop and equipment.

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

• Annual company gathering.