Senior AI Security Engineer

Security Engineer, Application - Greenhouse; Sydney; On-site; AUD 180,000 - 240,000; Full time

Job summary

Firmus Technologies in Australia is seeking a Senior AI Security Engineer within the AI & Applications team to enable secure design, development, release, and operation of AI products and applications.

You will work with AI engineers, application engineers, product managers, and DevOps to embed practical security controls into workflows, model-serving APIs, and enterprise data integrations while balancing innovation and risk.

Qualifications

• Role focuses on secure-by-design architectures for AI-powered products and services.
• Collaborates with AI product, application, and engineering teams, product managers, and DevOps.
• Balance security requirements with rapid AI innovation and regulatory/compliance needs.

Responsibilities

• Partner with AI product, application, and engineering teams from discovery through production to define secure-by-design architectures for AI-powered products and services.
• Threat-model LLM-enabled and agentic workflows, including direct and indirect prompt injection, data exfiltration, unsafe tool use, excessive agent permissions, cross-tenant access, model abuse, and unintended autonomous actions.
• Design secure patterns for agent identity, delegated authorization, scoped credentials, tool allowlists, approval gates, action validation, execution sandboxing, rollback, and auditability.
• Secure RAG and enterprise-knowledge workflows, including document ingestion, indexing, retrieval permissions, metadata filtering.

Job description

Firmus Technologies

Firmus 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 Cloud

Our 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.

Why Firmus?

As an NVIDIA Cloud and Engineering partner in Asia Pacific, you will gain skills, experience, and exposure across the AI industry and be part of shaping what this industry looks like for decades to come.

We are founder-led, not a big corporate. Decisions happen fast, our leaders are accessible, and there's minimum bureaucracy between you and the work. Ownership comes early. Whatever your role, you will have a direct line to outcomes, helping shape how the business grows as we scale nationally across a long-term, large-scale roadmap.

Work alongside founders and experts in AI infrastructure, energy systems and next-generation compute.

What we build here has impact beyond the business

Our AI Factories are designed to operate as assets to the energy grid to actively strengthen the communities and regions they operate in rather than drawing from them.

Considering applying? You don't need a perfect background to join our team. If you're driven and curious, there's a path for you. We back our people to grow into new domains and take on challenges beyond their previous experience.

ROLE SUMMARY

The Senior AI Security Engineer - AI Products & Applications will be embedded within the AI & Applications team to enable the secure design, development, release, and operation of AI products and applications. The role works directly with AI engineers, application engineers, product managers, inference engineers, DevOps, and platform teams to build practical security controls into agentic workflows, retrieval-augmented generation (RAG), model-serving APIs, enterprise-data integrations, and user-facing AI experiences.

This is a product- and application-oriented security role. The engineer will help teams deliver trusted AI features without unnecessarily slowing innovation, while ensuring that AI products protect customer, enterprise, and operational data. The role reports operationally to the Head of AI & Applications, with a dotted-line reporting relationship to the Head of Cybersecurity to maintain alignment with enterprise security strategy, risk management, compliance requirements, and incident-response processes.

KEY RESPONSIBILITIES

• Partner with AI product, application, and engineering teams from discovery through production to define secure-by-design architectures for AI-powered products and services.
• Threat-model LLM-enabled and agentic workflows, including direct and indirect prompt injection, data exfiltration, unsafe tool use, excessive agent permissions, cross-tenant access, model abuse, and unintended autonomous actions.
• Design secure patterns for agent identity, delegated authorization, scoped credentials, tool allowlists, approval gates, action validation, execution sandboxing, rollback, and auditability.
• Secure RAG and enterprise-knowledge workflows, including document ingestion, indexing, retrieval permissions, metadata filte