haddock (YC W22)
Backend Engineer
haddock (YC W22)Spain2 days ago
Full-timeRemote FriendlyEngineering, Information Technology
We’re haddock — building the financial OS for restaurants across Europe. We're looking for a backend engineer who wants to own core functionalities, roll out new integrations, shape our infrastructure, and push the boundaries of reliability and scalability.

This isn’t just another backend role — it’s your chance to lead a mission-critical area of our platform from day one.

🧩 What you’ll own

You’ll be the technical lead of many backend-oriented initiatives, from our integrations to our core product that powers restaurant owners — architecting, scaling, and operating the backend systems that power haddock’s growth. Your work will directly impact how restaurants connect their systems and manage their business. You’ll:

  • Design and implement solutions, from data structures and microservices, to new integrations with external providers and services
  • Extend and maintain connectors with an eye toward robustness and reuse
  • Drive infrastructure improvements for scalability, observability, and security
  • Collaborate with the rest of the team on architecture and deployment
  • Set standards for integration quality, reliability, and performance

🎯 What we’re looking for

  • Startup growth mindset – you've worked at growing startups & tech companies and learned your lessons from the challenges it involves
  • Product oriented – you empathize with users (e.g., restaurants), prioritize impactful work, and communicate clearly across teams
  • Backend focus – strong skills in server‑side development (TypeScript/Node, Python, Go, etc.) and database modeling
  • Infrastructure expertise – experience managing services in cloud environments (GCP or AWS or Azure, Docker, CI/CD, monitoring/logging)
  • Integration know‑how – comfortable with REST APIs, webhooks, and async patterns (message queues, retries)
  • Ownership mentality – proactive, resourceful, and comfortable leading technical decisions
  • Experience – 5+ years building and operating backend systems at scale
  • Languages – fluency in Spanish, and comfortable with English (projects and incidents are written in English, and we work with some international clients).

⚡ Extras we love

  • Experience working with POS systems or in the restaurant/HORECA sector or accounting software
  • Experience implementing performant database queries
  • Familiar with domain‑driven design or microservices
  • Background in incident response, SRE practices, or service-level objectives

🤝 Why you'll love it

  • Ownership from day one – lead this mission-critical area as we expand
  • Fast‑growing impact – integrations are core to scaling haddock into new markets
  • Cross‑functional influence – work with product, customer success, and engineering to shape flow and experience
  • Career growth – shape team practices, mentorship opportunities, and future technical strategy
  • Great package – €45–50 k gross/year, hybrid remote, Urban Sports Club, snacks, Payflow, central office near La Pedrera

🚀 Our process

We move fast (1 week!) while keeping it friendly and respectful:

  • Intro call (~30 min) with a co-founder.
  • Technical interviews (~2 hr) — integration and infra design deep dive + live backend/infrastructure task.

Key Skills

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