Principal Site Reliability Engineer

Ready to be a Titan? We're looking for a Principal Site Reliability Engineer to join our Site Reliability & Infrastructure Engineering team. We run entirely on the cloud, and this team owns the reliability and health of the systems running on top of it — designing the signals that tell us when something's wrong, and building the systems that keep ServiceTitan running better, faster, and cheaper as we scale.   At Principal level, you won't just operate the platform — you'll define how we think about reliability across the entire engineering organization. You'll set the technical direction, establish the standards, and be the person other engineers turn to when the hardest infrastructure problems need to be solved.   We make a huge impact on thousands of companies in the U.S. and abroad by enabling them to be more efficient and effective at running their business. We have a cultural foundation built on diversity, inclusion, and innovation, and we want you and your ideas to thrive at ServiceTitan. Come join us.

Define the technical vision and long-term architecture for ServiceTitan's reliability and infrastructure platform — setting the standard for how we operate at scale. Lead the design and delivery of major platform initiatives: Kubernetes infrastructure, observability frameworks, SLO programs, and incident management systems. Partner with Engineering Managers, Staff Engineers, and product engineering leadership to review architecture and infrastructure decisions before they ship — and hold the bar on non-functional requirements across the org. Identify systemic reliability risks before they become incidents, and drive remediation across teams with org-wide impact. Define and operationalize SLIs, SLOs, and error budgets across ServiceTitan's platform — not just within the SRE team, but as a standard every engineering team adopts. Drive adoption of reliability and observability best practices across engineering — through documentation, design reviews, and direct partnership with product teams. Leverage and champion AI-assisted engineering tools (Claude Code, GitHub Copilot, MCP-based agents) to automate investigations, accelerate incident resolution, and build the next generation of SRE tooling. Mentor Staff and Senior SREs, raising the technical ceiling of the team through code reviews, architecture feedback, and direct pairing on complex problems. Contribute to the technical hiring bar — participate in system design interviews and help define what Principal-level looks like at ServiceTitan.

Kubernetes (must-have): deep, expert-level understanding of Kubernetes as a system — not just operations, but internals, failure modes, capacity planning, and large-scale cluster management. SRE principles: proven experience defining and operationalizing SLIs, SLOs, and error budgets across an engineering organization — able to speak to how you drove adoption, not just how you implemented them on your own team. Observability at scale: deep expertise with a modern observability stack (OpenTelemetry, Prometheus, Grafana, Datadog, or Elasticsearch) and the ability to design observability frameworks that work org-wide, not just per-service. Cloud engineering & networking: expert grounding in AWS, GCP, or Azure — including networking fundamentals, security, and cost optimization at scale. Distributed systems depth: able to reason through complex failure modes (retry storms, cascading failures, thundering herds, timeout propagation) and architect systems that degrade gracefully under pressure. Incident management: track record of leading major incident response, driving blameless postmortems, and implementing systemic fixes — not just resolving individual incidents. CI/CD: deep experience with CI/CD systems and the ability to improve pipeline reliability and safety at org scale. AI tooling: hands-on experience building or deploying AI-assisted SRE capabilities — root cause