Site Reliability Engineer — Scale Data Infra on AWS & ClickHouse

PostHog; United States; On-site; USD 140,000 - 210,000; Full time

Job summary

PostHog is a fully remote product analytics company seeking a Senior Site Reliability Engineer to own production infrastructure at scale on AWS. You’ll manage large fleets of EC2-based VM workloads, improve deploy tooling, and collaborate with ClickHouse engineers to turn database needs into infra solutions.

The role emphasizes end-to-end ownership, on-call readiness, and building self-healing automation to reduce incidents.

Qualifications

• Prior experience with ClickHouse or other OLAP databases.
• Strong experience operating production infrastructure on AWS.
• Hands-on experience with VM-based systems (EC2).
• Experience automating infrastructure using 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.
• You’re comfortable owning systems end-to-end, including on-call responsibilities.

Responsibilities

• 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 strong focus on making incidents rarer over time.
• You’ll have room to design and automate, not just respond to alerts.

Skills

ClickHouse

OLAP databases

AWS

Linux

Stateful systems

On-call ownership

Tools

Terraform

Ansible

EC2

Job description

PostHog is a fully remote product analytics company seeking a Senior Site Reliability Engineer to own production infrastructure at scale on AWS. You’ll manage large fleets of EC2-based VM workloads, improve deploy tooling, and collaborate with ClickHouse engineers to turn database needs into infra solutions.

The role emphasizes end-to-end ownership, on-call readiness, and building self-healing automation to reduce incidents.