Senior Staff AI Security Engineer

Role Description

We are hiring a Sr. Staff AI Security Engineer to secure Life360's AI infrastructure as it takes shape. You will sit within the AI Native Platform team, reporting directly to the CISO, working alongside the engineers designing and building each layer of the platform.

This role is grounded in execution with real architectural reach. You'll drive delivery across key security domains while contributing to design decisions that shape how the platform is built. The patterns we are securing are still being defined, and part of the work is building and validating those patterns under real conditions. You’ll be active in architecture reviews, own security implementation across your domains, and build the controls that make it safe to move fast with AI. In a domain where the playbooks are still being written, part of the role is writing them. You won't be doing this alone; you'll work alongside additional security engineers and the broader team building the platform, with the expectation that this function grows as the platform does.

The data at stake has real weight. Life360's systems carry real-time location data and family relationship graphs for tens of millions of people, including children. These are crown jewels in the truest sense — irreplaceable to the families who trust us with them. Securing the AI systems that interact with this data is not a compliance exercise. It is a core obligation of the product.

What You'll Do

• Secure how Life360 accesses frontier models.
• Design, build, and iterate the access controls, policy enforcement, and authorization patterns that govern how systems interact with the frontier models they rely on.
• Build secure patterns for MCP access and tool use authorization.
• Design and build the identity and authorization model for autonomous agents: service identities, scoped credentials, and least-privilege access patterns.
• Design and build agentic observability and adversarial defenses.
• Shape security for the common AI end-user platform.
• Secure the shared knowledge layer.
• Build AI supply chain integrity into the platform.
• Partner with Privacy, Legal, and Data Platform to ensure the right controls are built into pipelines handling real-time location, family relationship data, and data involving minors.

Qualifications

• 12+ years in security engineering with depth in application security, cloud security, IAM, or detection.
• Hands-on builder shipping security controls that hold up in production.
• Hands-on fluency with LLM and agentic systems.
• Solid grounding in IAM for non-human systems.
• Experience with production telemetry and detection.
• Comfort with ambiguity and in-flight builds.
• Strong cross-functional communication and the ability to push back when it matters.
• Familiarity with NIST AI RMF, OWASP LLM Top 10, and adjacent compliance environments for consumer data at scale.
• Bachelor's degree or equivalent experience in Computer Science, Information Security, or a related field.

Bonus Points If You Have

• Experience with frontier model API security, tool-use authorization patterns, or access governance for AI systems at scale.
• Hands-on experience with multi-agent orchestration frameworks.
• Familiarity with knowledge graph architectures, vector stores, or RAG systems.
• Red teaming or adversarial testing against AI systems.
• Background in consumer technology or another domain where personal data sensitivity is a core product obligation.
• Experience designing or reviewing security for internal enterprise AI platforms serving non-technical users.

Benefits

• Competitive pay and benefits.
• Medical, dental, vision, life and disability insurance plans (100% paid for employees).
• 401(k) plan with company matching program.
• Mental Wellness Program & Employee Assistance Program (EAP) for mental well-being.
• Flexible PTO, 13 company-wide days off throughout the year.
• Winter and Summer Weeklong Synchronized Company Shutdowns.
• Learning & Development programs.
• Equipment, tools, and reimbursement support for a productive remote environment.
• Free Life360 Platinum Membership for your preferred circle.
• Free Tile Products.