Senior Site Reliability Engineer

Our requirements

• 5+ years professional experience in site reliability engineering, DevOps, or platform engineering roles.
• Strong Kubernetes experience: cluster operations, networking (Ingress, network policies), storage, autoscaling, and hands-on troubleshooting across production environments.
• Solid Infrastructure as Code experience with Terraform; familiarity with Bicep or ARM templates is a plus.
• Production experience with Azure cloud services: AKS, ACR, Key Vault, Azure Monitor, Application Insights, Virtual Networks, and Private Endpoints.
• Strong observability experience: Prometheus, Grafana, centralized logging, alerting configuration, and distributed tracing instrumentation.
• Working knowledge of SLO/SLI methodology: error budget principles, reliability target setting, and capacity planning.
• Structured incident management experience: on-call ownership, blameless post-incident review, and runbook authorship.
• Scripting and automation proficiency in Python or bash for toil elimination and operational tooling.
• Strong CI/CD experience: GitHub Actions and ArgoCD or equivalent GitOps tooling.

Optional

• Kubernetes certifications: CKA or CKAD.
• Experience supporting AI or ML infrastructure workloads: GPU scheduling, model serving platforms, or inference pipeline operations.
• Exposure to chaos engineering practices and fault injection testing.
• FinOps experience: reserved capacity planning, resource right-sizing programs, and cost attribution per team or workload.
• Service mesh experience (Istio, Linkerd) for traffic management and reliability patterns.
• Experience in regulated industries (insurance, finance, healthcare) where auditability, change traceability, and secure-by-default operations are standard practice.

Your responsibilities

• Define, instrument, and maintain SLOs and SLIs for platform components; own error budget tracking and produce regular reliability reports for hub leadership.
• Serve on the on-call rotation as the infrastructure escalation tier; lead incident response for cluster-level, network-level, and storage failures; chair blameless post-incident reviews.
• Implement and operate Kubernetes infrastructure (AKS): cluster lifecycle management, networking, resource quotas, autoscaling configuration, and multi-tenancy patterns across spoke namespaces.
• Develop Infrastructure as Code (Terraform) to provision and manage Azure resources with consistency, auditability, and repeatable rollback capability.
• Build and maintain observability infrastructure: Prometheus, Grafana, Azure Monitor, and Application Insights; own alerting rules, dashboards, and distributed tracing coverage across platform components.
• Perform capacity planning and cost-aware resource management: right-size node pools, tune vertical and horizontal pod autoscalers, and identify resource waste across namespaces.
• Identify and eliminate toil: automate repetitive operational tasks through scripting and tooling; measure and track toil reduction over time.
• Maintain platform reliability procedures: rolling upgrades, backup and recovery testing, disaster recovery runbooks, and change freeze coordination.
• Contribute to CI/CD pipelines and GitOps tooling (GitHub Actions, ArgoCD) from a reliability and deployment safety perspective; work with the Platform Team on release gates and rollback mechanisms.
• Collaborate with the Run & Change team on incident SLA targets and operational procedures; work with Security Engineers on infrastructure hardening and vulnerability remediation.

About the project

This is how we organize our work

This is how we work on a project

• Continuous Deployment
• Continuous Integration
• DevOps
• issue tracking tools
• testing environments

What we offer

• Contract under Polish law: B2B or Umowa o Pracę
• Benefits such as private medical care, group insurance, Multisport card
• English classes available
• Opportunity to work with excellent professionals
• High standards of work and focus on the quality of code
• New technologies in use
• Continuously learning and growth
• International team
• Pinball, PlayStation & much more (on-site)

Benefits

• sharing the costs of sports activities
• private medical care
• life insurance
• remote work opportunities
• fruits
• video games at work
• coffee / tea
• drinks
• parking space for employees
• leisure zone
• Pinball, PlayStation & much more
• English classes

Recruitment stages

• 1.
  📞A quick phone call with our Recruiter.
• 2.
  📅Online technical interview, testing your skills.
• 3.
  📅II face-to-face interview with your potential supervisor.
• 4.
  🗒️Feedback.

Webellian Sp. z o.o.