Senior DevOps & Platform Engineer - Multi-Cloud SaaS

3M Consultancy; Sydney; On-site; AUD 140,000 - 190,000; Full time

Job summary

3M Consultancy is 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. You will work on both day-to-day operations and strategic architectural contributions in a multi-cloud environment from Sydney, Australia.

The role requires expertise in Terraform/Terragrunt, Kubernetes (EKS/AKS), ArgoCD, Helmfile, and GitHub Actions, with strong emphasis on security, observability, and scalable SaaS operations.

Qualifications

• 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.

Responsibilities

• Own the full delivery lifecycle of a multi-tenant AI SaaS platform across AWS, Azure, and GCP.
• Contribute to architectural improvements with focus on resiliency, security, and cross‑cloud compatibility.
• Onboard new clusters end-to-end from bootstrap to ArgoCD app‑of‑apps patterns.
• Maintain GitOps-driven Kubernetes workload delivery via ArgoCD and Helmfile.

Skills

Terraform

Terragrunt

Kubernetes

Multi-cloud (AWS/Azure/GCP)

Identity & Secrets Management

Observability tooling

Tools

ArgoCD

Helmfile

GitHub Actions

Job description

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 new 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