Site Reliability Engineer (US - Central/Eastern time)

About PostHog

PostHog makes products self-driving. It is the only platform that acts as a co-pilot for developers and AI agents to diagnose bugs, analyze data, and roll out changes autonomously. We are product-led, default alive, and well-funded, with over 450,000 organizations using our platform.

Things We Care About

• Transparency: We share our roadmap, strategy, and internal metrics openly.
• Autonomy: Engineers lead product teams and make their own decisions.
• Shipping Fast: We prioritize small, autonomous teams that own products end-to-end.
• Time for Building: We are a natively remote company that defaults to async communication with meeting-free Tuesdays and Thursdays.
• Ambition: We aim to solve big problems and value optimistic, high-upside thinking.
• Being Weird: We embrace unconventional ideas as a competitive advantage.

Who We're Looking For

We are seeking SREs based in the US (Central/Eastern Time) who enjoy deep ownership of production systems. You should be comfortable with stateful infrastructure, AWS, and automation.

• Enthusiastic Drivers: Proactive individuals who own projects from start to finish.
• Optimistic Problem Solvers: Resilient collaborators who iterate their way out of complex challenges.
• Grown Ups: Low-ego, professional, and respectful team members.
• Genuine Builders: People who love building software and infrastructure.

What You'll Be Doing

This is not a "keep the lights on" role. You will turn a fast-growing, stateful system into a predictable, well-automated platform.

• Operate EKS clusters with Karpenter, Cilium, and ArgoCD.
• Manage multi-account AWS environments, networking, and access control.
• Maintain Terraform/Terragrunt IaC pipelines.
• Improve operational tooling for deploys, schema changes, and incident response.
• Reduce operational load through self-healing automation.
• Optimize cloud spend and participate in on-call rotations.

Requirements

• Deep hands-on experience with Kubernetes (EKS) in production at scale.
• Strong experience operating production infrastructure on AWS (IAM, networking, multi-account).
• Proficiency in Terraform or Terragrunt with module design experience.
• Solid understanding of Linux systems (disk, memory, networking).
• Experience supporting stateful systems (databases, queues, storage).
• Ability to debug performance and reliability issues in production.

Nice to Have

• Experience with GitOps (ArgoCD) and CI/CD (GitHub Actions).
• Experience building AI agent-enabled infrastructure services.
• Familiarity with multi-region infrastructure and consistency/availability tradeoffs.