Lead Security Engineer - Real-Time AI Platform

Reactor; San Francisco (CA); On-site; USD 180,000 - 250,000; Full time

Benefits offered by this job

Salary and equity package

Visa sponsorship

Health insurance

Job summary

Reactor is hiring a Principal Security Engineer in San Francisco to build and own Reactor's security program from the ground up. You will protect models and data, lead security reviews, and drive compliance with partners and customers in a fast-paced startup environment.

You will be hands-on, set the security strategy, and represent the security function with external stakeholders. This role requires deep cloud security expertise and the ability to communicate complex concepts to both technical

Qualifications

• You've led security, or been one of the senior people on a security team, at an AI lab, a GPU cloud, or a cloud infra company.
• You write code, and like to be hands-on
• Deep experience securing cloud-native infrastructure
• You've taken a company through a compliance framework like SOC 2 and handled enterprise security reviews while keeping engineering moving
• People in security or AI know your work: talks, published research, open source, or a track record at a company whose name carries weight
• You are able to communicate complicated technical security problems across both technical and non-technical audiences.
• You want to work at an early-stage startup: small team, lots of ownership, fast pace, in person in SF

Responsibilities

• Set Reactor's security strategy and own it end-to-end
• Protect the models and data our partners and customers trust us with
• Threat-model the platform and fix what you find
• Lead partner and customer security reviews and compliance work
• Represent Reactor's security work with partners, customers, and the wider security and AI community
• Build security into how the team ships
• Set up detection and incident response across the organization

Skills

Security leadership

Hands-on security engineering

Cloud security

SOC 2 compliance

Communication

AI/ML security

SF in-person

Job description

Reactor is hiring a Principal Security Engineer in San Francisco to build and own Reactor's security program from the ground up. You will protect models and data, lead security reviews, and drive compliance with partners and customers in a fast-paced startup environment.

You will be hands-on, set the security strategy, and represent the security function with external stakeholders. This role requires deep cloud security expertise and the ability to communicate complex concepts to both technical