haddock is looking for a Senior DevOps/SRE Engineer to own their cloud platform - from CI/CD and data layer security to AI infrastructure cost and performance. Barcelona (Hybrid — 2 days in office, Poblenou) They talk to customers, deliver quality work, improve our tooling, and are ambitious. We strongly adhere to the Lean Startup and Agile principles, favoring action over analysis, imperfect iteration over perfect delivery, and face-to-face communication.

As Senior

DevOps / SRE Engineer Engineer, you'll be an individual contributor within the engineering team, occassionally embeded in squads, but most of the time working on the platform roadmap. More than 50% of our infrastructure cost today is tied to AI workloads, not traditional SaaS software operations. You'll own both worlds: classic platform work and the cost, performance and reliability of our AI stack.

You'll also use AI daily to do your own work, from infra automation, debugging, writing code, monitoring, etc.

Make infra observable: clear, actionable metrics and dashboards, including AI workload cost and performance Own cloud cost: visibility, predictability, optimization, with a sharp focus on our AI spend Help us scale performance: PostgreSQL optimization, caches, queues, pub/sub, and search/analytics infra (Elasticsearch, BigQuery, ClickHouse...) Keep-the-lights-on work is shared, like bug fixing, monitoring and dependency management. Moving our PostgreSQL and MongoDB databases behind a VPC with no downtime, and tightening secrets management and IAM along the way.

Getting AI infra cost and performance under control: instrumenting our AI workflows, identifying waste, and making our AI spend predictable as we scale.

Fixing our top performance bottlenecks:



identifying the queries and endpoints that hurt most, fixing them, and mentoring the team so good query patterns become the default. Leading the decision on whether to adopt Elasticsearch, BigQuery, ClickHouse or similar, backed by data from real product needs.

Accomplished in cloud and platform: hands-on with cloud infra, VPCs, networking, IAM and secrets.

Performance and scale at the data layer: you've fought DB performance for real, designing indexes, solving partitioning, etc. You've worked with caches, queues or pub/sub in prod, and have used at least one search or analytics tool at scale (Elasticsearch, BigQuery, ClickHouse or similar). 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. haddock is the market leader solution for point of control in restaurants, handling all back-office vital operations like product management, inventories, purchases, price tracking, document conciliation, bank conciliation, paychecks, clocking in/out, P&L; reports, etc. Our vision is to lead the market through innovation, strong relationships and by becoming the go-to tech partner for restaurant success. haddock is backed by Y Combinator, the accelerator behind Airbnb and Twitch. Many of our restaurants are based right here in Barcelona, and they love haddock.

First and foremost, the project itself is the main reason why people join haddock: a growing startup with ambition, product-market fit, and great culture. A bright modern office in Barcelona, in Poblenou. Probably the best office you've ever worked at.

Hybrid work, with 2 days at the office to build trust, collaborate, align and get creative. Part 1: deep dive into a past infra/performance problem you've solved end-to-end.

📌 Senior SRE/DevOps Engineer (Barcelona)
🏢 JobFluent
📍 Barcelona