Member of Technical Staff - Security

Prime Intellect, Inc.; San Francisco (CA); Hybrid; USD 180,000 - 350,000; Full time

Benefits offered by this job

Cash compensation with equity incentives

Flexible work arrangement

Professional development budget

Job summary

Prime Intellect, Inc. in San Francisco is seeking a Security Engineer to own the security posture of its AI training platform. This role is crucial as it involves safeguarding sensitive customer assets and involves establishing a security org from the ground up.

The ideal candidate has over 5 years of experience in security engineering, especially in cloud and infrastructure security. Prime Intellect offers a competitive compensation package ranging from $180k to $350k+, along with equity incentives and flexible work arrangements.

Qualifications

• 5+ years in security engineering or related roles.
• Deep experience with cloud security, particularly GCP.
• Strong ability to read and audit code.

Responsibilities

• Own security architecture and compliance for multi-tenant infrastructure.
• Implement threat modeling and manage incident responses.
• Build and maintain security monitoring and alerting systems.

Skills

Cloud security

Infrastructure security

Penetration testing

Incident response

Kubernetes security

Tools

Python

Rust

Job description

Overview

Building Open Superintelligence Infrastructure

Prime Intellect is building the open superintelligence stack - from frontier agentic models to the infra that enables anyone to create, train, and deploy them. We aggregate and orchestrate global compute into a single control plane and pair it with the full RL post‑training stack: environments, secure sandboxes, verifiable evals, and our async RL trainer. We enable researchers, startups and enterprises to run end‑to‑end reinforcement learning at frontier scale, adapting models to real tools, workflows, and deployment contexts.

We recently raised $15mm in funding (total of $20mm raised) led by Founders Fund, with participation from Menlo Ventures and prominent angels including Andrej Karpathy (Eureka AI, Tesla, OpenAI), Tri Dao (Chief Scientific Officer of Together AI), Dylan Patel (SemiAnalysis), Clem Delangue (Huggingface), Emad Mostaque (Stability AI) and many others.

Role Impact

Security is the single highest‑stakes function at Prime Intellect. Our customers — from frontier AI labs to enterprises — trust us with their most valuable assets: proprietary models, training data, and the compute that powers them. This role owns the security posture of everything we ship: the hosted RL training platform, distributed GPU infrastructure, liquid compute marketplace, and all customer‑facing surfaces.

You’ll be the first dedicated security hire and will define how we think about security as a company — from threat modeling and secure architecture to incident response and compliance. You’ll work directly with engineering, research, and leadership to embed security into every layer of the stack, and you’ll manage relationships with external penetration testers and security auditors to continuously validate our defenses.

Core Technical Responsibilities

Preventive Security & Secure Architecture

• Own threat modeling across our entire surface area: multi‑tenant training infrastructure, sandboxed execution environments, API surfaces, and internal tooling
• Design and implement zero‑trust networking, identity, and access control across distributed GPU clusters and cloud infrastructure
• Build secure‑by‑default patterns for our platform engineers — auth, secrets management, supply chain integrity, container hardening
• Architect tenant isolation and data boundary enforcement for hosted RL training workloads (customers run arbitrary code in our environments)

AI‑Native Security

• Develop security frameworks specific to AI infrastructure: model weight protection, training data isolation, checkpoint integrity, gradient privacy
• Secure the RL training loop end‑to‑end — from environment execution in sandboxes to reward signal verification and model artifact storage
• Build detection and prevention for AI‑specific attack vectors: prompt injection across agentic pipelines, model exfiltration, adversarial environment manipulation

Offensive Security & External Engagements

• Scope, manage, and run point on external penetration tests across our platform, hosted training infrastructure, and liquid compute layer
• Build and maintain an internal red‑team practice — automated and manual — targeting our most critical systems
• Drive vulnerability management: triage, remediation SLAs, and root cause analysis

Detection, Response & Observability

• Build security monitoring and alerting across infrastructure (distributed clusters, Kubernetes, cloud) and application layers
• Implement runtime security for containerized training workloads and sandboxed environments
• Own incident response — build the playbooks, run the drills, lead the post‑mortems
• Design audit logging and forensic capability across all customer‑facing systems

Compliance & Customer Trust

• Drive SOC 2 Type II readiness and other compliance frameworks required by enterprise customers
• Own the security narrative for customer‑facing materials — questionnaires, architecture reviews, trust documentation
• Partner with GTM to unblock enterprise deals that depend on security posture

Technical Requirements

• 5+ years in security engineering, infrastructure security, or offensive security roles — ideally at companies operating multi‑tenant cloud or compute infrastructure
• Deep experience with cloud security (GCP preferred), Kubernetes security, and container runtime hardening
• Hands‑on ability to read, write, and audit code in Python and Rust (or strong systems‑level language)
• Experience with network security in distributed systems — service mesh, mTLS, network segmentation across heterogeneous hardware
• Proven track record managing external penetration tests and translating findings into engineering action
• Strong fundamentals in cryptography, identity/access management, and secure software development lifecycle

Nice to Have

• Experience securing GPU infrastructure or ML training pipelines
• Background in offensive security — CTFs, bug bounties, red team engagements
• Familiarity with AI‑specific threat models (model extraction, training data poisoning, sandbox escape)
• Experience building security programs from scratch at a high‑growth startup
• SOC 2, ISO 27001, or FedRAMP compliance experience
• Open‑source security tooling contributions
• Familiarity with eBPF, Falco, or similar runtime security tools

What We Offer

• Cash Compensation Range of $180-350k+ with significant equity incentives
• Flexible work arrangement (remote or San Francisco office)
• Full visa sponsorship and relocation support
• Professional development budget for courses and conferences
• Regular team off‑sites and conference attendance
• Opportunity to shape the future of decentralized AI development

Growth Opportunity

You’ll be the foundational security hire at a company where security is existential — not a checkbox. As we scale to support frontier AI labs and enterprises running their most critical training workloads on our platform, you’ll build the security org from the ground up and have direct influence on company strategy.

We value intensity and ownership over credentials. If you’ve built security programs at infrastructure companies, broken into systems professionally, or have deep conviction about how AI infrastructure should be secured — we want to talk.

Ready to help shape the future of AI? Apply now and join us in our mission to make powerful AI models accessible to everyone.