Principal Security Engineer
Reactor · San Francisco
InfrastructureonsitePrincipalSalary and equity at the 99th percentile for our stage (Pave benchmarks)
At a glance
Highlights
- Build Reactor's security program from ground up for real-time world models.
- Protect models and data trusted by labs like Alibaba, Amazon, NVIDIA.
- Represent Reactor's security work with partners and AI community.
What they offer
- Salary and equity at the 99th percentile for our stage
- Visa sponsorship and relocation support
- Generous health, dental, and vision coverage
Ideal candidate
Hands-on security leader from an AI lab or cloud infra background who thrives on ownership and wants to build from zero in-person in SF, pairing deep technical chops with clear communication to customers and partners.
Requirements
- Led security or been senior on security team at an AI lab, GPU cloud, or cloud infra company
- Write code and like to be hands-on
- Deep experience securing cloud-native infrastructure
- Taken a company through SOC 2 and handled enterprise security reviews
- Known work in security or AI via talks, research, open source, or top company track record
- Communicate complex technical security problems to technical and non-technical audiences
- Want to work at an early-stage startup in person in SF
- visa sponsorship
- Available
Lab profile
About Reactor
Inference platform for real-time world models powering media, physical AI, and omni-directional applications.
What they build
- Inference platform for real-time world models
- Catalog of 15+ world models including LingBot World 2, LTX 2.5 Realtime, HappyOyster
Known for
- Largest and fastest world model catalog
- Real-time optimized inference
- Works with Alibaba, Amazon, and NVIDIA
Key facts
- Raised $59M led by Lightspeed
- Backed by Amplify Partners, WndrCo, and NVentures
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