- 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 (Barcelona)
🏢 Jobtailor
📍 Barcelona