[Hiring] SRE - Infra @PostHog

Role Description

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.

• Reducing operational stress, designing safe automation for traffic-heavy workloads.
• Building the tooling and patterns that let the system scale without scaling human effort.
• Working on problems that only show up at large scale (petabytes of data, thousands of cores, constant ingestion) across a multi-region, multi-account AWS platform running many services on Kubernetes.
• Operating EKS clusters across several environments with Karpenter autoscaling, Cilium networking, and ArgoCD-driven GitOps deployments.
• Managing and evolving a multi AWS account organization, provisioning, networking, access control, and cross-account connectivity.
• Maintaining the Terraform/Terragrunt IaC platform - modules, automated plan-on-PR / apply-on-merge pipelines, and safe patterns for shared infrastructure.
• Improving operational tooling around deploys, schema changes, backups, restores, and incident response.
• Reducing operational load by identifying repeat pain points and eliminating them through code and self-healing automation.
• Optimizing cloud spend as you go.
• 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. You should join this team if you like deep ownership of production systems and enjoy building the platform layer that everything else runs on.

Qualifications

• Deep hands-on experience with Kubernetes in production (EKS preferred).
• Strong experience operating production infrastructure on AWS.
• Experience automating infrastructure using Terraform or Terragrunt at scale.
• 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.
• Enjoy owning complex infrastructure and learning how the pieces fit together.

Requirements

• Experience with GitOps workflows (ArgoCD) and CI/CD pipelines (GitHub Actions).
• Experience with building AI agent-enabled base-level infra services for teams that move fast.
• Familiarity with multi-region infrastructure and the consistency/availability tradeoffs that come with it.

Benefits

• Transparent company culture with access to roadmap and strategy.
• Autonomy in choosing projects based on impact and interest.
• Fast-paced shipping environment with a focus on building.
• Room for ambition and solving big problems.
• Encouragement of creativity and "weird" ideas as a competitive advantage.