Platform Operations Engineer

2 days ago

Stockholm, Stockholm, Sweden Warner Media, LLC. Full time

Job Opportunity

Warner Bros. Discovery is hiring a Cloud Native Software Developer to join our Direct to Consumer (DTC) Operational Engineering team. This role requires a deep understanding of cloud-native technologies, particularly Kubernetes and containerization.

Responsibilities

  1. Design and implement automated processes for upgrading Kubernetes clusters, including analysis of new version features and impact on workload running on each cluster.
  2. Use tools to scan clusters for finding things that need remediation, define actions for it, as well as executing them.
  3. As part of rolling out upgrades to hundreds of clusters, some ranging up to a thousand nodes, you will identify automation opportunities to reduce the amount of toil needed.
  4. To keep the runtime infrastructure secure, you will roll out security patches to Kubernetes nodes (EC2 AMI updates) on a regular basis (PCI compliance demands new patches to be installed at least every 30 days) and help improve the automation tooling to eventually run this on an automated schedule.
  5. In order to keep our runtime cost low, you will take part in cost optimization efforts, like tweaking the Karpenter node scaling strategies, increasing the bin-packing efficiency of pods on nodes, ensuring the right node family type is used (m, c, r, spot and Graviton/ARM) and identifying over scaled infrastructure.
  6. To enable faster time to new markets and onboarding of new tenants to our streaming platform, you'll work on automating the creation of new Kubernetes clusters together with bootstrapping of critical platform capabilities like service mesh, deployment systems and the observability stack (metrics, tracing, logging).

Requirements

  1. At least 1-2 years of Kubernetes experience.
  2. At least 1-2 years of AWS experience.
  3. At least 2-3 years of software development, infrastructure management or operations experience.
  4. Ability to write code for automation in python, bash or golang.
  5. Experience with designing infrastructure CI/CD pipelines, e.g. Jenkins or GitHub Actions.
  6. Experience with IaC, preferably Terraform.
  7. Used to Helm templating for k8s manifests.
  8. Understanding of how GitOps tooling like ArgoCD or Flux works.
  9. Experience in rolling out infrastructure changes to production by following a change management workflow.
  10. Knowing what metrics to monitor during a change rollout to identify problems.
  11. Strong ownership mentality during rollouts, stop/rollback and fix if problems occur or escalate to management/on-call if getting stuck.
  12. Strong sense of security, always using least privileges access and firewall configurations when needed for maintenance.
  13. Understanding of how running workloads on the Kubernetes clusters may be affected by cluster changes or node rotations.
  14. Willingness to talk to service development teams and understand their challenges when they report problems during maintenance windows.
  15. Ability to define and measure KPIs and honor SLAs for infrastructure maintenance.
  16. Experience with Git and GitHub PR workflows.
  17. Experience in working with Agile – Sprints, Epics/Stories, Jira.

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