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# Senior Ruby on Rails Backend Engineer - Remote

- **Company:** Ersilia
- **Location:** Barcelona, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Cursor, Ruby on Rails, Claude Code, Backend
- **Published:** November 9, 2026
- **Apply:** https://www.jobleads.com/es/job/senior-ruby-on-rails-backend-engineer-remote--barcelona--e8b8dedc552f4b133b154ce556c8618d2

## About the Role

The role demands 5+ years of production experience, an AI-first mindset with Cursor/Claude Code/Codex, and an autonomous work style with advanced English.

## Description

Ersilia in Barcelona is hiring a senior backend engineer to own a critical production system, contribute to the roadmap, and bring new ideas through experiments. You will work hands-on on a Ruby on Rails stack, ensuring reliability and performance while collaborating with engineering and product teams.

The role demands 5+ years of production experience, an AI-first mindset with Cursor/Claude Code/Codex, and an autonomous work style with advanced English.