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

📌 Senior Devops Engineer (Cataluña)
🏢 JobFluent
📍 Cataluña