You will take ownership of a backend system that is critical to the company and our customers. You will have the opportunity to help define our roadmap and find the best technical solutions. You will also have time to run some experiments and bring new ideas to the table.

Your responsibilities:

● Hands-on code implementation, code reviews, testing

● Ensure reliability, performance and correctness.

● Diagnose and resolve complex production issues.

● Collaboration with other engineering & Product teams.

● Make pragmatic decisions balancing risk, maintainability, and business needs.

● Improve code quality and internal structure where possible.

What we are looking for:

● 5 years plus experience building and maintaining production systems as backend engineer

● Strong experience with Ruby on Rails

● AI-first mindset using tools like Cursor, Claude Code, Codex, in your daily workflow

● Working on large-scale products

● Experience owning systems that are business critical.

● Methodical approach to debugging and problem solving.

● Comfortable working autonomously with high ownership.

● Advanced level of English.

Tech Stack:

Language & Platform: Ruby

Data: PostgreSQL or Redis

Infrastructure: Tailwind

Location:

Barcelona, Spain > or Fully remote within a +/- 4hrs CET

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Skill richieste

Ruby on RailsOwnership of business-critical backend systemsProduction troubleshooting and incident responseHands-on code implementation and code reviewsAutomated testing and test-driven developmentPerformance, reliability and correctness engineeringPostgreSQLRedisScalability and large-scale system designCross-functional collaboration with Product and Engineering teamsTechnical decision-making and balancing risk vs maintainabilityRefactoring and improving code quality/internal structureAI-assisted development tools (e.g., Cursor, Claude Code, Codex)Autonomy and high ownership in working styleAdvanced English proficiency

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