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PostHog Logo PostHog · IT - Software Development

SRE- Clickhouse Team

United States · Job Posted February 21, 2026
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Job Description

We run one of the largest self-managed ClickHouse installations on AWS, already at petabyte scale, and we’re actively preparing it for the next 10–50× of growth. This role sits at the centre of that effort. You won’t be in a typical “keep the lights on” SRE role. The work is about turning a fast-growing, stateful system into a predictable, well-automated platform. You’ll work on the kind of problems that only show up at large scale (petabytes of data, thousands of cores, constant ingestion). You’ll have room to design and automate, not just respond to alerts.

Job Responsibility

  • Turning a fast-growing, stateful system into a predictable, well-automated platform (provisioning, scaling, rebalancing, recovery)
  • Reducing operational stress, designing safe automation for data-heavy workloads, and building tooling and patterns for scale
  • Managing large fleets of EC2-based VMs, disks, and networking for data-intensive workloads
  • Improving operational tooling around deploys, schema changes, backups, restores, and incident response
  • Working closely with ClickHouse engineers to turn database-level needs into infra-level solutions
  • Reducing operational load by identifying repeat pain points and eliminating them through code and self-healing automation
  • Participating in on-call and incident response, with a focus on making incidents rarer over time

Requirements

  • Strong experience operating production infrastructure on AWS
  • Hands-on experience with VM-based systems (EC2), not just managed PaaS
  • Experience automating infrastructure using tools like Terraform, Ansible, or similar
  • Solid understanding of Linux systems (disk, memory, networking, failure modes)
  • Experience supporting stateful systems (databases, queues, storage systems, etc.)
  • Ability to debug and reason about performance and reliability issues in production
  • Comfortable owning systems end-to-end, including on-call responsibilities

Nice to have

  • Prior experience with ClickHouse or other analytical databases
  • Experience operating systems at very large data scale
  • Familiarity with Kubernetes (helpful, but not the core of this role)
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  • Bachelor’s or Master’s degree in Computer Science or a related field
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What we offer
  • Flexible work environment - ClickHouse is a globally distributed company and remote-friendly. We currently operate in 20 countries
  • Healthcare - Employer contributions towards your healthcare
  • Equity in the company - Every new team member who joins our company receives stock options
  • Time off - Flexible time off in the US, generous entitlement in other countries
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  • Equity in the company - Every new team member who joins our company receives stock options
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