Senior Security Engineer, Platform Engineering

Matchbox; Sydney; Hybrid; AUD 150,000 - 230,000; Full time

Job summary

Firmus Technologies, based in Sydney, seeks a Senior Security Engineer to lead platform security across AI infrastructure. You will drive security design for cloud and on‑prem environments, partner with teams, and shape security culture to protect data and workloads.

The role requires hands-on experience with Kubernetes security, image signing, vulnerability scanning, and automated compliance. You will mentor engineers and advance security practices across the organization.

Qualifications

• Bachelor's degree in computer science or a related technical field.
• 7+ years of experience in Platform Security, DevSecOps, or Site Reliability Engineering.
• Strong proficiency in security standards and frameworks (CIS, NIST, ISO 27001, SOC 2).
• Experience with Kubernetes security, supply chain security, and cloud-native tooling.

Responsibilities

• Lead platform security efforts across cloud and on-prem environments.
• Own security standard for managed Kubernetes services and HPC products.
• Apply Kubernetes security best practices: RBAC, admission controllers, pod security, auditing, network policies.
• Implement supply chain security: image signing, vulnerability scanning, policy enforcement.
• Automate security in IaC pipelines and patch management.
• Collaborate with teams for automated compliance checks, secrets management, and IAM.

Skills

Kubernetes security

IaC security

Secrets management

Identity management

SSL/TLS management

Bash scripting

Education

Bachelor's degree in Computer Science or related field

Tools

Calico

kube-bench

Falco

Cosign

Trivy

Kyverno

Checkov

Snyk

HashiCorp Vault

Azure Key Vault

Auth0

Job description

# Senior Security Engineer, Platform EngineeringFirmus TechnologiesOn-site • Sydney, New South Wales, AustraliaFull-time## Role OverviewFirmus TechnologiesFirmus Technologies is a global leader pioneering the development and operation of efficient AI infrastructure across Asia Pacific.Founded in Australia in 2019, our mission is to create the most efficient AI infrastructure by combining cutting-edge technology with a steadfast commitment to sustainability.At Firmus, we are unique in our approach. We design, build, and operate a new class of digital infrastructure – the AI Factory. Through our model-to-grid technology approach, we have pushed the boundaries of multi-generational liquid cooling systems, energy management, AI software orchestration, and construction. For our customers, this approach allows us to make every watt count and deliver low-cost AI tokens globally.Firmus AI CloudOur large-scale GPU cloud platform, Firmus AI Cloud, is purpose-built to deliver energy-efficient AI compute at scale to customers.It empowers developers, enterprises, educational institutions, and government users to train and deploy AI models with unmatched efficiency and cost savings. With an ever-growing suite of services and applications, we are committed to delivering a cloud experience that is market-leading, proprietary, and built to scale.ROLE SUMMARYFirmus Technologies is seeking a Senior Security Engineer, Platform Engineering to join our AI Platforms team. You will drive the design and implementation of our platform security. You will also champion and partner with other teams to standardize security management and build internal security culture across the organization. This role is ideal for a self-starter with passion for building things from first principles. You naturally break down complex problems into their fundamental truths to uncover novel and elegant solutions—rather than relying on conventional patterns.KEY RESPONSIBILITIES* Lead platform security efforts by assessing risks, hardening platforms, and ensuring secure access for cloud and on-premises systems.* Own the security standard for Firmus Managed Kubernetes Service for high-performance computing product offering to customers with NVIDIA H200 and GB300.* Apply Kubernetes security best practices, including RBAC, admission controllers, pod security, auditing, and network policies.* Implement supply chain security for Kubernetes, including image signing, vulnerability scanning, and policy enforcement.* Secure infrastructure as code (IaC) pipelines with automated security scanning.* Automate patch management for platform components, ensuring timely updates and robust testing before deployment.* Experiment with AI/ML-powered tools to eliminate mundane tasks, know security posture quickly and take proactive action on drift or anomalies.* Collaborate with other teams to align and enhance security posture on:* Automated compliance checks and reporting.* Secrets management for secure credential storage and auditing.* Identity and privileged access management for applications and remote access.* Encryption solutions, including SSL/TLS certificate management, to protect data in transit and at rest* Security monitoring and incident response.* Security awareness and guidance to engineering and operations teams.SKILLS AND EXPERIENCE* Bachelor's degree in computer science or a related technical field.* 7+ years of experience as Platform Security, DevSecOps or Site Reliability Engineer.* Demonstrated strong proficiency on the following areas:* Security standards and frameworks, including CIS Benchmarks, NIST, ISO 27001, and SOC 2.* OWASP Top 10 security risks for applications and cloud-native infrastructure.* Kubernetes security and networking best practices with tools like Calico, kube-bench, or Falco.* Kubernetes supply chain security best practices with tools like Cosign, Trivy or Kyverno.* Automated IaC security scanning with tools like Checkov or Snyk.* Secrets management such as HashiCorp Vault or Azure Key Vault.* Identity Access Management and Privileged Access Management such as Auth0, Microsoft Entra, HashiCorp Boundary or Teleport.* SSL/TLS certificate management, including automated issuance, renewal, deployment, and monitoring.* Competent in scripting and programming skills (e.g., Bash, Python, Go).* Systems knowledge on Linux internals, networking stacks, and distributed storage.* Clear and effective English communication, written and spoken.* Security certifications (e.g., CISSP, CKS, OSCP, GCP/AWS/Azure Security).* Bonus:* Experience in high-growth startups or regulated industries with robust security and data privacy requirements, including SOC 2 Type 2, ISO 27001, PCI DSS or HIPAA.* Experience applying security principles to AI/ML Ops environments.Location & Reporting* Location: Sydney, Australia* Reporting to General Manager, FinanceEmployment BasisFull-timeDiversityAt Firmus, we are committed to building a diverse and inclusive workplace. We encourage applications from candidates of all backgrounds who are passionate about creating a more sustainable future through innovative engineering solutions.Join us in our mission to revolutionize the AI industry through sustainable practices and cutting-edge engineering. Apply now to be part of shaping the future of sustainable AI infrastructure.## The Team You'll JoinPlatform Engineering