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Product Engineer (AI, Senior Full Stack)

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Hybrid

Product Engineer (AI, Senior Full Stack)

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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