Responsibilities Engineers at haddock are action-oriented, curious, autonomous, and take full ownership of their work.

Architect technical solutions

Build backend and frontend code (80% backend, 20% frontend)

Engineer AI workflows, balancing latency, cost and accuracy

Do your own project management, rolling out your initiatives to customers

Track users, measure interactions and extract conclusions

Talk to customers to validate ideas and get feedback

Example Work

Enabling Fina to match bank movements with invoices, finding gaps and reporting them to the suppliers via AI phone call.

Enabling business data to tell the story of the restaurant to their owners, displaying them financial metrics and insights, and enabling AI agents to work on that data.

Increasing adoption of inventories to 50% of customers, a crucial part of operations at a healthy restaurant business.

Building MVPs for traceability, enabling groups of restaurants to comply with food health inspections,



and evolving it based on feedback.

Requirements

3+ years of engineering experience working on SaaS applications in Agile environments.

Product Engineering experience: end-to-end from ideation, infrastructure, backend, frontend, testing, etc.

Experience setting up or working with infrastructure (using services, serverless functions, databases, external APIs, caches, queues, events, etc.).

Very good use of AI tooling.

Fluent in Spanish and comfortable in English.

Previously built AI workflows for production is a plus.

Benefits

Competitive salary (€40–55k gross/year), with increasing raises.

Bright modern office in Barcelona, in Poblenou.

Hybrid work with 2 days at the office.

All AI tooling for experimentation.

Subsidized Urban Sports Club membership.

Benefits for spending part of your salary via Playflow.

📌 Product Engineer (Senior Full Stack) (Madrid)
🏢 haddock (YC W22)
📍 Madrid