Senior Database Administrator (ClickHouse)

Own the reliability and performance of our production ClickHouse clusters, whether self-hosted on Kubernetes or running on managed ClickHouse services. Design a standard architecture and tooling that let us grow to dozens of multi-node clusters without the operational work growing at the same pace. Manage the whole cluster lifecycle as code: provisioning, configuration, scaling, upgrades, and migrations. Build monitoring and alerting that catch problems before users notice them. Own backups and disaster recovery, and test restores regularly. Keep clusters secure by default. Plan capacity and keep infrastructure costs under control. Be the go-to person on ClickHouse for developers, DevOps engineers, other DBAs, and engineering leadership, from schema design and data ingestion to query performance. Handle routine database requests and automate as many of them as you can. Step in during rare production emergencies, including outside business hours. Afterwards, lead the root-cause analysis on the database side and contribute to the postmortem. Keep documentation and runbooks up to date, and share what you know with the team.

Desired Candidate Profile

What you'll bring

• Deep, DBA-level knowledge of ClickHouse from running it in production. You should understand how it stores, merges, replicates, and queries data, and be able to explain why a cluster behaves the way it does.
• Strong SQL is part of this, including optimising complex analytical queries and reviewing schema design.
• Ability to design architecture and automation that holds up across dozens of multi-node clusters.
• Experience running a large fleet of databases (dozens or hundreds of instances) is a strong advantage, and the engine does not have to be ClickHouse.
• You have run and maintained stateful workloads on Kubernetes in production, well beyond the initial deployment.
• Production use of a Kubernetes operator to run databases. Any engine counts, for example CloudNativePG, Zalando Postgres Operator, Altinity, or the official ClickHouse operator.
• Experience with version upgrades, backup and restore, and migrating large datasets between clusters or regions with zero or minimal downtime.
• Strong troubleshooting skills across the whole stack, from queries and schema design down to Kubernetes, Linux, storage, and networking.
• A proactive approach to database health. You have built monitoring and alerting with any modern observability stack, and you act on early warning signs before they turn into incidents.
• Database security in practice: encryption in transit and at rest, access control, and secrets management.
• Infrastructure as code with any mainstream tool, plus at least one programming or scripting language for automation.
• You have hands-on experience with cloud infrastructure on any major provider, as opposed to only using a platform that another team runs.
• Clear communication, written and spoken, with engineers and with leadership, whether the subject is architecture, performance, an incident, a risk, or a cost. You should be able to take a problem from investigation to production fix on your own.
• Nice to have: Hands-on work on the source code of a Kubernetes operator for databases, as a developer or contributor.
• Practical use of AI tools for database observability or for automating routine operational tasks.
• A background in highly regulated environments.
• Any Kubernetes or cloud certifications.