Sr Specialist System Engineering (4G/5G-ANT DevOps/Infra Engineer)

Job Responsibilities

• Serve as the primary offshore DevOps/Infra support lead for automation tools and 4G/5G core network simulators across NPRD/Labs and PROD environments.
• Design, build, and maintain Azure DevOps CI/CD pipelines using a 3-tier architecture (hyper macro micro) to automate packaging, publishing, and deployments.
• Develop and maintain Helm v3 (OCI) charts for application and infra components; package/publish artifacts to JFrog Artifactory OCI.
• Automate Kubernetes deployments via Python orchestration (e.g., deploy.py), including config substitution, sequencing, and post-deploy health checks.
• Own end-to-end secrets management: Ansible Vault encryption, HashiCorp Vault runtime retrieval (AppRole/KV), and token rotation with zero plaintext controls.
• Provision and operate infrastructure: KVM/QEMU/libvirt VM lifecycle on Simzone hosts; implement SR-IOV passthrough and host networking configurations.
• Author/maintain Infrastructure-as-Code using OpenStack HEAT (on-prem VM provisioning) and Azure Bicep (NAKS/AON resources).
• Configure advanced Kubernetes networking and security: Multus NADs (multi-NIC pods), MetalLB L2 VIPs, Calico policies, SR-IOV for performance I/O.
• Manage storage and stateful services: Rook - Ceph provisioning (RWX/RWO), local storage for single node clusters, PVC sizing, and storage class governance.
• Build/maintain large Ansible automation footprint (deployment, upgrades, backup/restore, mechID mgmt, vault operations, compliance tasks).
• Operate AOSM lifecycle pipelines (nfPL0 nfPL4) to publish NF definitions, build deployment configs, deploy to NAKS, and onboard to HCEV.
• Drive environment promotion (NPRD PROD): release branching, versioning updates, quarterly release coordination, and consistency across lab/pre-prod/prod.
• Maintain per-instance configuration at scale (20+ Kubernetes instances) using real-parameters-values.json / input-values.json and enforce correctness across environments.
• Implement observability and verification: deploy kube-prometheus-stack, integrate DevOps metrics (DORA Build Events API), and standardize service health checks.
• Own certificate lifecycle management via cert-manager and vault-issuer patterns.

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