Senior Infrastructure Engineer - Observability

As a Senior Infrastructure Engineer on our Observability team, you’ll design, build and run the observability platform that SentinelOne engineers use to monitor our global products. You’ll own key parts of the stack from start to finish. You’ll work independently within the team’s roadmap and be a go-to resource for teammates.

We’re looking for someone with hands-on Kubernetes and observability experience who enjoys running high-volume systems for collecting, storing and analyzing telemetry data in production. Your work will give engineering teams better visibility into their systems and help them ship faster and more safely.

What Will You Do?

Primary responsibilities include:

• Design and build scalable, resilient parts of our telemetry platform (Grafana, Prometheus, Thanos/Mimir/Cortex, OpenTelemetry) so SentinelOne engineers can deploy and monitor features quickly and safely.
• Own small-to-medium features from requirements refinement and technical design through to production rollout.
• Work with the engineering teams that use the platform to understand their needs, refine requirements, and flag work that is underspecified.
• Work across large-scale Kubernetes environments (EKS, GKE) on AWS and GCP.
• Keep the services you own reliable and cost-efficient, for example by right-sizing cloud resources and tuning telemetry volume.
• Automate repetitive operational work to reduce toil and pager load.
• Manage infrastructure as code (Terraform, Ansible) and follow security, compliance, and change-management procedures in production.
• Take part in on-call: troubleshoot complex production issues, improve runbooks and dashboards, lead postmortems, and see corrective actions (CATs) through.
• Review peers' code and designs and give clear, constructive feedback.
• Mentor teammates and share knowledge through docs, demos, and internal talks.

What Skills and Knowledge Will You Bring?

Ideal candidates will have:

• 5 or more years of experience in Infrastructure Engineering, Site Reliability Engineering (SRE), or a related systems-focused field.
• Hands-on experience running observability stacks in production: Prometheus, Grafana, Thanos (or Mimir/Cortex), and OpenTelemetry.
• Production experience with Kubernetes (EKS, GKE) and tools such as Helm and Kustomize, and experience with at least one major cloud provider (AWS or GCP).
• Proficiency with infrastructure-as-code tools, specifically Terraform and Ansible.
• Experience keeping large-scale SaaS or distributed systems reliable, including on-call and incident response.
• Hands-on experience with CI/CD pipelines and common deployment strategies (rolling, blue-green, canary).
• Proficiency in Go or another mainstream language (e.g., Python).
• Familiarity with on-premises, hybrid, or air-gapped Kubernetes deployments is preferred.
• Experience with GitHub Actions specifically, or with progressive delivery tools (e.g., Argo CD, Argo Rollouts, Flagger) is preferred.
• Experience reducing telemetry costs, for example through cardinality management or retention tuning, is preferred.

Why SentinelOne?

AI is redefining how the world operates and rewriting the rules of security in real time, and SentinelOne was built for this moment. From day one, we architected an AI-native platform designed to operate at machine speed, not as an add-on to legacy systems but as the foundation itself. If you want to build where innovation and impact move together, this is that place.

We invest in our Sentinels with comprehensive, competitive benefits designed to support you and your family:

Salary starting from 4000 EUR/month. Annual bonus based on company performance, paid in two installments. The final base salary may be adjusted based on the individual skills and experience of the selected candidate.

Equity & Rewards

• Restricted Stock Units (RSUs)
• Employee Stock Purchase Plan (ESPP)
• Performance-based bonus

Time Off & Wellbeing

• Flexible time off, on top of the standard 5 weeks PTO
• Paid company wellness days and fully paid short-term sick/nursing leave
• Gender-neutral parental leave

Insurance & Financial Security

• Life and disability insurance
• Pension Insurance contribution
• Global business travel medical insurance
• Employee Assistance Program (EAP)

Work Perks & Flexibility

• Global home office allowance
• Meal allowance
• Hybrid work in Prague (Karlin), Brno (Clubco) or remote in CZ/SK. Only Prague-based employees are required to work from the office at least 2 days/week.

Wellness & Lifestyle

• Wellbeing allowance
• MultiSport benefit program
• Wellness Coach app