Security Engineer, Application

Firmus

Sydney, Australia, Australia · Australia

Salary undisclosed

full_time

onsite

Posted 16h ago · Sep 13, 2026

Firmus Technologies <span data-ccp-parastyle="FIR Body" data-ccp-parastyle-defn="{"ObjectId":"baa2b379-a6d3-56f4-af2b-6a08de9434e5|1","ClassId":1073872969,"Properties":[469777841,"Aeonik",469777842,"Aeonik",469777843,"Aeonik",469777844,"Aeonik",469769226,"Aeonik",201342446,"1",201342447,"5",201342448,"1",201342449,"1",201341986,"1",268442635,"20",335551500,"197122",335559740,"264",201341983,"0",335559738,"145",469775450,"FIR Body",201340122,"2",134234082,"true",134233614,"true",469778129,"FIRBody",335572020,"1",469778324,"Body Text"]}">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 <span data-ccp-parastyle="FIR Body" data-ccp-parastyle-defn="{"ObjectId":"baa2b379-a6d3-56f4-af2b-6a08de9434e5|1","ClassId":1073872969,"Properties":[469777841,"Aeonik",469777842,"Aeonik",469777843,"Aeonik",469777844,"Aeonik",469769226,"Aeonik",201342446,"1",201342447,"5",201342448,"1",201342449,"1",201341986,"1",268442635,"20",335551500,"197122",335559740,"264",201341983,"0",335559738,"145",469775450,"FIR Body",201340122,"2",134234082,"true",134233614,"true",469778129,"FIRBody",335572020,"1",469778324,"Body Text"]}">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.  ROLE SUMMARY  Firmus Technologies is seeking a Senior Security Engineer, Application for our Engineering and Technology team. You own application security for Firmus AI Cloud and the internal software that runs it. Automation is how you scale that ownership. Customers provision GPU compute through API and console, software engineers build against it, and our operators run the platform through the same control plane. You own the security of that software: the public APIs, the services behind them, how tenants stay separated inside the application, and the AI assistants and agents we ship on top.  KEY RESPONSIBILITIES  Automation and secure delivery  <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="1" data-aria-level="1">Own the CI/CD security gates that every production repository passes through: SAST, DAST, SCA, secrets detection, and SBOM generation. </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="2" data-aria-level="1">Build the systems that do the repeatable work: finding triage, dependency uplift, evidence collection, and draft threat models.  </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="3" data-aria-level="1">Ship the secure paved roads other teams build on: reusable libraries, service templates, and developer tooling. </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="4" data-aria-level="1">Write and review code in the services you protect, including the security-critical paths that tools miss. </li> </ul> Security architecture and standards  <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="5" data-aria-level="1">Set the application security standard and control for authentication, authorisation between services, tenant isolation at the application boundary, secret handling and logging. </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="6" data-aria-level="1">Lead threat modelling and secure design review. Define what an attacker can do and what must be true before it ships. </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="7" data-aria-level="1">Set the security requirements for the AI assistants and agents we ship e.g. prompt injection, context poisoning. </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="8" data-aria-level="1">Govern which tools and tool servers our AI agents and software engineers may reach, and how those integrations are scoped, allow-listed, and audited. </li> </ul> Assurance and vulnerability management  <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="9" data-aria-level="1">Own application security posture across our services: what is covered, what is open, what is accepted with a named owner and an expiry, and what is overdue. </li> </ul> <ul> <li data-leveltext="" data-font="Symbol" data-listid="14" data-list-defn-props="{"335552541":1,"335559685":720,"335559991":360,"469769226":"Symbol","469769242":[8226],"469777803":"left","469777804":"","469777815":"hybridMultilevel"}" data-aria-posinset="10" data-aria-leve

Platform Engineering

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