- Own one or two product surfaces end to end, including UI, Postgres schema, edge functions, deployment, and post-deployment operation- Build and operate LLM-backed product functionality, including prompts, retrieval, evaluations, cost and latency optimization, and output validation- Convert customer objections and call transcripts into shipped product- Build with coding agents and take responsibility for their output- Improve codebase rules, agent skills, and gates that catch problems before human PR review- Talk directly with recruiter customers to understand what is broken- Participate in a small-team, fast-decision engineering process using Linear, feature branches, PR review, squash merges, protected main, and deploy-on-merge- Collaborate asynchronously with regular in-person timeRequirements- Strong TypeScript and React fundamentals- Shipped full-stack features and operated them, including migrations, auth, deploys, and production debugging- Shipped something with an LLM in the critical path and kept it working- Experience working inside a real engineering pipeline with branches, code review, CI, and releases- Daily use of coding agents; ability to explain prompting, reviewing,



and validating agent output- Ability to reason about unfamiliar code and catch plausible but incorrect agent output- Ability to work independently, identify next steps, and ask promptly for missing information- Existing right to work in the EU or EEA- English for company communication- Familiarity with TypeScript, React, Postgres, Supabase, Next.Js, Vercel, Linear, Node.Js or Python is relevant; not all stack experience is expectedCore CompetenciesDemonstrates expertise in full-stack development with a focus on TypeScript and React, while effectively managing product surfaces and collaborating in a fast-paced engineering environment. Proficient in deploying LLM-backed functionalities and optimizing performance through rigorous testing and validation.Highest-signal resume keywords- TypeScript- React- LLM Integration- Postgres- Full-Stack DevelopmentHard Skills- Full-Stack Features- Production Debugging- Migrations- Auth- CI/CDSoft Skills- Independent Work- Problem-Solving- CommunicationIndustry Keywords- Engineering Pipeline- Code Review- Deployment- Agent Output Validation- Customer CollaborationTools & Technologies- Linear- Supabase- Next.Js- Vercel- Node.Js- Python#J-18808-Ljbffr

📌 Ai Engineer – Full-Stack (Barcelona)
🏢 Jobtailor
📍 Barcelona