- 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

📌 AI Engineer - Full-Stack (Barcelona)
🏢 Jobtailor
📍 Barcelona