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Juan Ramírez

@juanramrez

Senior Platform Engineer at Virgin Media O2 / Sopra Steria managing 30+ air-gapped OpenShift clusters and automating release mirroring.

Spain

Message

At Virgin Media O2 / Sopra Steria, I design and operate a fleet of 30+ OpenShift clusters in an air-gapped, multi-tenant telecom environment. I led the migration from VMware Tanzu to OpenShift, creating reusable provisioning patterns that cut new-cluster onboarding time by about 80%.

I built an automated pipeline to mirror OpenShift releases and operators across four Quay registries, with integrity verification. I also developed a Go and React dashboard that makes release versions and operator state visible across those registries.

At Ednon, I built a Go CLI for multi-tenant Kubernetes user management and engineered on-premises networking with Cilium and BGP. Across my platform work, I’ve also developed Kubernetes disaster recovery automation, GitOps delivery, and infrastructure tooling.

Experience

Work history, roles, and key accomplishments

Current

Senior Platform Engineer (SRE)

Current

Virgin Media O2 / Sopra Steria

Dec 2024 - Present (1 year 10 months)

Designed and operated a 30+ cluster OpenShift fleet in an air-gapped, multi-tenant telecom environment, standardizing architecture, RBAC, and lifecycle. Led migration from VMware Tanzu to OpenShift, cutting new-cluster onboarding time by ~80%.

OpenShift Kubernetes Go Python GitOps ArgoCD RHACM ClusterAPI Terraform Ansible HashiCorp Vault Quay.Io Harbor Nexus Loki Vector OpenShift Logging NetBackup MetalLB Cilium BGP VMware Tanzu RBAC Disaster Recovery CI CD

Cloud & Kubernetes Engineer

Ednon

Feb 2024 - Dec 2024 (10 months)

Built a Go CLI tool for multi-tenant Kubernetes user management, replacing manual kubectl operations. Engineered advanced networking using Cilium and BGP for on-premises service exposure and traffic control.

Go Kubernetes Cilium BGP ArgoCD Helm Prometheus Elastic Stack Azure Key Vault GCP Ansible VMWare

Cloud & DevOps Engineer

Inetum

Sep 2022 - Feb 2024 (1 year 5 months)

Designed and implemented a dependency-aware Kubernetes disaster recovery orchestration system in Python, coordinating Velero restores across microservice architectures. Managed Kubernetes clusters across on-prem, AWS (EKS), and GCP (GKE) environments.