Obsidian Security is the leading SaaS security platform, trusted by global enterprises like Snowflake, T-Mobile, and Algolia. We protect 200 organizations across North America, Europe, the Middle East, Southeast Asia, Australia, and New Zealand, including many of the world’s largest Fortune 1000 and Global 2000 companies. Founded in 2017 and backed by top investors like Greylock, Obsidian was built to close a critical gap: securing SaaS apps where business happens—Microsoft 365, Salesforce, and hundreds more. The company does this by offering a complete SaaS security platform to reduce risk, detect and respond to threats, and prevent breaches at the source. Obsidian was built by leaders who redefined endpoint and identity security at CrowdStrike, Okta, Cylance, and Carbon Black. Now, they’re transforming how SaaS is secured. With AI driving rapid SaaS growth and complexity, agentic AI tools gain privileged access to sensitive data through integrations, creating new risks most security tools miss. Obsidian uniquely detects anomalous OAuth token activity and manages integration risks. Major announcements are on the horizon. Recognizing that SaaS security needs to evolve, Obsidian enables growing organizations to start with a lightweight, prevention-focused browser extension and expand coverage over time. With global momentum, a growing partner ecosystem including SentinelOne, Databricks, and Google Cloud, and a major fundraise ahead, Obsidian is scaling rapidly toward long-term growth and IPO readiness. Sr. Site Reliability Engineer (SRE) — Obsidian At Obsidian, our Sr. Site Reliability Engineers ensure the reliability, scalability, and operational excellence of a complex multi-tenant SaaS platform serving enterprise and financial customers. As an SRE, you will work closely with DevOps, Platform Engineering, and product teams to improve system observability, incident response, and service resilience across the platform. This is a hands-on engineering role focused on building operational excellence through monitoring, automation, debugging, and continuous improvement. You will help ensure that issues are detected and addressed quickly while contributing to systems that improve platform reliability at scale. Key Responsibilities Reliability Engineering: Improve the reliability, availability, and resiliency of Obsidian’s production systems and distributed services Detection & Observability: Build and maintain monitoring, alerting, dashboards, and observability tooling to enhance system visibility and reduce operational noise Incident Response & Operations: Support incident response, on-call operations, troubleshooting, and postmortem processes to drive operational excellence Collaboration: Partner with engineering teams to implement SLI/SLO practices, operational standards, and reliability-focused workflows Execution: Automate infrastructure operations, deployment workflows, and platform tooling across Kubernetes, cloud infrastructure, and data pipelines Required Qualifications 3-6 years of experience in Site Reliability Engineering, DevOps, Production Engineering, or related roles Experience operating and supporting production systems in AWS and/or GCP Familiarity with Kubernetes and Helm in cloud-native environments Experience with observability and monitoring tools such as Prometheus, Grafana, Datadog, or similar platforms Exposure to CI/CD systems such as GitLab CI/CD, GitHub Actions, ArgoCD, or equivalent Strong troubleshooting and debugging skills across distributed systems and microservices Experience writing automation or infrastructure tooling using scripting or programming languages Strong systems thinking and a collaborative engineering mindset Preferred Qualifications AI Agent development experience Experience supporting SaaS platforms in production environments Familiarity with incident management and postmortem practices Exposure to infrastructure-as-code and GitOps workflows Understanding of SLI/SLO concepts and operational metrics Experience with enterprise-scale monitoring or customer-facing production systems Why This Role Work on reliability challenges across a large-scale distributed SaaS platform Build and improve observability and operational tooling used across engineering Gain hands-on experience with cloud infrastructure, Kubernetes, and production systems Help safeguard critical services for enterprise and financial customers What Success Looks Like Production issues are detected and resolved quickly Monitoring and alerting provide clear, actionable operational insights Reliability metrics and operational practices improve over time Engineering teams can effectively troubleshoot and self-serve observability Automation reduces operational toil and improves platform stability Employee Benefits Our competitive benefits packages are designed to support our employees' well-being, both at work and at home. Our US based employees enjoy: Competitive compensation with equity and 401k Comprehensive healthcare with dental and vision coverage Flexible paid time off and paid holiday time off 12 weeks of new parent or family leave Personal and professional development resources For more details on our US benefits, or for information on our international benefits, please see here. Pay Transparancy Please note that the base pay range is a guideline and for candidates who receive an offer, the base pay will vary based on factors such as work location, as well as the knowledge, skills and experience of the candidate. In addition to a competitive base salary, this position is eligible for equity awards and may be eligible for sales commission or incentive compensation based on the role or function within the company. At Obsidian, we are proud to be an equal-opportunity employer. We value diversity and hire for talent, passion, and compassion. In compliance with federal law, all persons hired will be required to submit satisfactory proof of identity and legal authorization. If you have a need that requires accommodation, please contact accommodations@obsidiansecurity.com Information collected and processed as part of any job applications you choose to submit is subject to Obsidian’s Applicant Privacy Policy. Base Salary Range £95,000 - £117,000 GBP