Sydney, Australia | Posted on 07/27/2026 Job Title: Senior DevOps / Platform Engineer Location: Sydney, Australia.

Duration: 6-12 Months Contract.

Role Overview We are seeking a hands-on Senior DevOps/Platform Engineer to own the full delivery lifecycle of a multi-tenant AI SaaS platform across AWS, Azure, and GCP. This role spans both day-to-day operational responsibilities and strategic architectural contribution. Infrastructure & Cloud - Manage Terragrunt-wrapped Terraform IaC for multi-customer cloud account provisioning

- Provision and maintain cloud resources including EKS, AKS, RDS, Redis, ACR/ECR, KMS/Key Vault, and workload identity across cloud providers
- Onboard current clusters end-to-end from bootstrap scripts through ArgoCD app-of-apps patterns
- Maintain GitOps-driven Kubernetes workload delivery via ArgoCD and Helmfile
- Author and promote Helm chart overlays across multiple environments
- Debug and remediate containerized workloads (Temporal, Authentik, kgateway, observability stacks)



across cloud providers CI/CD & Automation - Build and maintain reusable GitHub Actions CI/CD workflows for Docker image builds, Terraform plan/apply gates, and cross-repo deploys
- Troubleshoot and remediate issues across a highly variable, multi-layer technology stack Architecture & Engineering - Contribute to product feature enhancements through design and implementation of architectural improvements
- Ensure all architectural changes satisfy requirements for resiliency, security, and compatibility across multiple cloud providers Required Skills - Production-level Terraform and Terragrunt in multi-account/multi-cloud environments
- Kubernetes (EKS and AKS) - multi-cluster management, networking, workload troubleshooting
- AWS, Azure, and GCP - simultaneous multi-cloud experience required
- Familiarity with identity and secrets management (workload identity, KMS, Key Vault)
- Experience with observability tooling and modern SaaS platform operations

📌 Senior DevOps Engineer (City of Sydney)
🏢 3M Consultancy
📍 City of Sydney