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Immutable

Senior Security Engineer – Product Security

Immutable

. Own the vulnerability management program, including Bugcrowd and Immunefi bug bounties and scanning-tool findings .

Posted 10/23/2026full-timeSydney • AustraliaSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in application security, including vulnerability management and threat modeling, while effectively collaborating with engineering teams to implement security fixes and maintain compliance. Proficient in building AI tooling and managing bug bounty programs to enhance security measures.

Highest-signal resume keywords
Application SecurityVulnerability ManagementAWS SecurityAI Tooling DevelopmentBug Bounty Program Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Application Security DepthIdentifying Broken Authentication FlowsInjection Bug FixingProduction Code ShippingThreat ModelingSecurity Issue FixingIAM ManagementNetwork ControlsSecrets ManagementMisconfiguration Identification
Soft Skills
Autonomous WorkCollaboration with EngineersContributing Across Security Functions
Tools & Technologies
BugcrowdImmunefiAI AgentsScanning ToolsGCPWeb3 Technologies
Industry Keywords
Vulnerability Management ProgramSLA ComplianceThreat ModelsAttack GraphsDetection and Response

Tech Stack

Tools & technologies
AWSGoogle Cloud PlatformOpen SourceWeb3

About the role

Key responsibilities & impact
  • Own the vulnerability management program, including Bugcrowd and Immunefi bug bounties and scanning-tool findings
  • Achieve 90%+ SLA compliance on critical and high-severity issues
  • Own AI agents that review pull requests for security issues and triage incoming bugs
  • Build a security context layer with threat models, asset inventory, and past findings to support AI-agent triage and fix proposals
  • Keep threat models and attack graphs current as products evolve
  • Review new services with product engineering teams
  • Build threat models collaboratively with engineering teams
  • Fix security issues in application code
  • Report to the Head of Security
  • Help achieve the target of fixing 80% of vulnerabilities before production

Requirements

What you’ll need
  • Application security depth, including identifying broken authentication flows and injection bugs, explaining root causes, and implementing fixes
  • Capability as a software engineer who ships production code
  • Experience building AI tooling such as agents, automations, or internal tools
  • Solid AWS security experience, including IAM, network controls, secrets, and misconfigurations
  • GCP, detection and response, and web3 knowledge are useful but not deal-breakers
  • Side projects and open source work encouraged
  • Ability to work autonomously and alongside engineers
  • Willingness to contribute across security functions in a small team
  • Web3 experience such as wallet, smart contract, or dApp security is a bonus
  • Deeper detection and response experience or interest in developing it is a bonus
  • Experience running a bug bounty program or findings pipeline end to end is a bonus

Benefits

Comp & perks
  • Globally competitive base salaries and contributions to a long-term fund
  • Employee Stock Options (ESOP)
  • Flexible working model with hybrid work for Sydney-based employees and remote work options via global office hubs and WeWork All-Access
  • Fresh daily lunch at the Sydney CBD office
  • Quarterly End of Cycle Celebration Awards
  • USD $500 WFH allowance for home office setup
  • USD $600 per annum toward internet and phone usage
  • USD $75 per quarter for remote employees to celebrate with local team members
  • Medical and 401K Insurance for US employees
  • Novated Leasing for Australian employees
  • Up to USD $1,350 per annum for classes, courses, AI tooling or events
  • Free online courses via Udemy
  • USD $800 per year toward health and wellbeing
  • 24/7 unlimited counselling for employees and family through EAP Service
  • Monthly subsidy and discounted rate with ClassPass
  • 1-year free membership to Breethe
  • Paid parental leave
  • 2 additional paid annual leave days at the end of the year
  • Paid day off on birthday