- 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 - LLM Integration - Postgres - Full-Stack Development

Hard Skills

- Full-Stack Features - Production Debugging - Migrations - Auth - CI/CD

Soft Skills

- Independent Work - Problem-Solving - Communication

Industry Keywords

- Engineering Pipeline - Code Review - Deployment - Agent Output Validation - Customer Collaboration

Tools & Technologies

- Linear - Supabase - Next.js - Vercel - Node.js - Python

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