H
Haddock
Product Engineer (AI, Senior Full Stack)
Skills
MicroservicesAI
1 day ago
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Important information
Contract type:
Permanent
Salary:
€45,000 – €60,000 / year
Location:
Barcelona, Spain
Work mode:
Hybrid
Published on:
22 October 2026
What they need
- We’re looking for you! Engineers looking to make a difference in a product, embracing iteration, excellence, and AI like you’ve likely never done before
- Engineers at haddock are best-in-class: intelligent, action-oriented, curious, communicative, autonomous, and committed
- We strongly adhere to the Lean Startup and Agile principles. That’s why we work on initiatives in small mission-oriented squads of 1 to 3 people
- We rely heavily on AI for everything. We all embrace using AI for everything at work, creating new skills frequently and setting up autonomous workflows whenever possible
- Engineers are owners and work across the stack in order to achieve our objectives:
- Understand customers, goals, and the context in the restaurant sector
- Architect technical solutions
- Build backend and frontend code with many parallel agents (typically 80% backend, 20% frontend)
- Engineer AI workflows, balancing latency, cost and accuracy
- Do your own project management, rolling out your initiatives to customers
- Talk to customers to validate ideas and get feedback
- Keep-the-lights-on work is shared, like bug fixing, monitoring and dependency management. We succeed at this with rotating squads and Pit Stops
Benefits
- Flexible working hours- 👉 Experience in good coding practices and good architecture, like clean architecture, DDD, hexagonal, modular monoliths or microservice environments
- We think these requirements are often achieved with 5 years of experience in SaaS product companies, but for some it might have taken less, and for others it might take more
- 👉 Product Engineering experience: end-to-end from ideation, infrastructure, backend, frontend, testing, etc. because we aren’t “factory developers”, we are engineers of digital products responsible for outcomes, not for implementing requirements
- 👉 Fluent in Spanish and comfortable in English. We tend to speak in Spanish at the office and in Slack, and write documentation and projects in English
- 👉 Very good use of AI tooling: you have developed good judgement (criterio) when using IA and are very productive with it. You think in terms of AI workflows and automations, at work and at personal life- We usually respond within three days
- We move fast and communicate openly. Our goal is to wrap up the process within a week. Here’s what to expect:
- Intro call with Guillermo (Head of Technology), 25 mins
- Call with Pol (co-founder, CEO), 25 mins
- Technical interviews with Guillermo and another engineer (2 hours). Part 1: architectural solution thinking, and part 2: AI-assisted live coding of an MVP
- Final call with Arnau (co-founder, CEO), 25 mins
- Sounds like an opportunity? Apply now. We’d love to meet you
- 💬 We answer all applications that include a personalized message or cover letter
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