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 time
Requirements

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 expected
Core Competencies

Demonstrates 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
L

📌 AI Engineer – Full-Stack (Madrid)
🏢 Jobtailor
📍 Madrid