Senior Ruby on Rails Engineer - Remote AI Platform

Recruiter4you; Barcelona; Remote; EUR 75,000 - 105,000; Full time

Benefits offered by this job

100% remote working

Competitive salary (€75k–€105k)

Direct collaboration with senior tech

20 days of paid annual leave

Learning and development budget

Company laptop and equipment

Access to AI development tools

Annual company gathering

Job summary

Recruiter4you is seeking a Senior Ruby on Rails Engineer to join a fast-growing AI company behind an AI companionship platform. This is a fully remote role across Europe, with salary €75,000–€105,000 per year.

You will design, develop and scale backend services using Ruby on Rails, collaborating with the CTO, Tech Lead and distributed teams. You’ll own features from concept to deployment, write clean tests, and help shape the product as it grows.

Qualifications

• 5+ years of backend or full-stack software engineering experience.
• Strong, hands-on Ruby on Rails in production.
• Experience building and scaling production apps with real users.
• Ability to own features from requirements through deployment.
• Startup/scale-up experience in a fast-paced environment.
• Strong problem-solving with balance between code quality and speed.
• Excellent English and experience with international teams.
• Comfort with uncensored NSFW content in products.

Responsibilities

• Design, develop and maintain scalable backend applications with Ruby on Rails.
• Build new features and improve platform functionality.
• Collaborate with Product Managers to translate requirements into technical solutions.
• Write clean, well-tested production code.
• Participate in code reviews, testing and technical decision-making.
• Troubleshoot issues and improve performance, reliability and scalability.
• Collaborate with distributed engineering, product and infrastructure teams.

Skills

Ruby on Rails

Backend/Full-stack development

Ownership

Problem solving

English communication

Tools

PostgreSQL

Redis

Hotwire

Tailwind CSS

AI tools (Cursor, Claude Code, ChatGPT)

Job description

Recruiter4you is seeking a Senior Ruby on Rails Engineer to join a fast-growing AI company behind an AI companionship platform. This is a fully remote role across Europe, with salary €75,000–€105,000 per year.

You will design, develop and scale backend services using Ruby on Rails, collaborating with the CTO, Tech Lead and distributed teams. You’ll own features from concept to deployment, write clean tests, and help shape the product as it grows.