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.
📌 Senior Ruby On Rails Backend Engineer (Santiago de Compostela)
🏢 Ersilia
📍 Santiago de Compostela
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