Brainco

AI Infrastructure Security Engineer

San Francisco Bay Area · Senior

Sponsorship not specifiedDetected 303 days ago

PythonGoDatabricksAWSGCPCloud PlatformsKubernetesTerraformCI/CDLinuxSite Reliability EngineeringMachine LearningCybersecurityZero TrustPatient Care

About the role

As our Security Engineer, Infrastructure, you'll secure the platform layer end-to-end including cloud infrastructure, Kubernetes, identity, networking, and the systems that AI runs on.
You'll also be thinking a step ahead about security in an AI-native environment, where agents write code and operate inside developer and production workflows, while staying grounded in the core work of cloud, Kubernetes, identity, and networking.
Harden infrastructure end-to-end from cloud networking and service meshes to CI/CD pipelines and the data and model pipelines powering Brain Co's AI capabilities work.

You'll write code, ship infrastructure, and work shoulder-to-shoulder with our infra team as a true engineering partner, not a reviewer.
It's a high-ownership role for someone who wants to build secure-by-default infrastructure from first principles, and grow the function as the company scales.
Implement Zero Trust principles and machine identity across workloads; short-lived credentials, least-privilege access, and encrypted service communication.
Protect customer data and the agent workloads running on our platform. Design secure execution environments and data access pathways for code and actions taken by agents on our systems.
Build security guardrails directly into infrastructure and deployment workflows using Infrastructure-as-Code (Terraform) so security scales with the platform.
Own threat modeling across infrastructure layers-identifying and remediating risks before they become incidents.
Own security for Brain Co's forward-deployed infrastructure - designing and hardening bespoke VPCs and customer-environment deployments where every engagement brings its own unique attack surface.
Partner with platform, infra, product, and ML teams to ship code and infrastructure together as a true partner so engineers move fast with secure-by-default systems.

Experience with ML systems or multi-tenant platform isolation.
Familiarity with service mesh and zero-trust architectures.
Proficiency in Go, Python, or a similar language for automation and tooling.
Have 5+ years of experience in security engineering, infrastructure, or SRE with hands-on experience building or securing production systems at scale.
Have hands-on experience with Kubernetes, container security, and Linux systems.
Think in terms of threat models, trust boundaries, and failure modes and can translate that into concrete controls.
Have experience with authentication and authorization systems, secrets management, and cryptography basics.
Are a hands-on builder who is energized by writing code, shipping infrastructure, and partnering directly with infra and platform engineers rather than advising from the sidelines.

Are fluent in cloud security fundamentals (IAM, networking, KMS, secrets, isolation) across AWS, GCP, or Azure.

Competitive salary plus equity
Commuter benefits
Medical, Dental, and Vision
Earn competitive compensation and meaningful equity in a high-growth company.
Streamlined hospital patient care across national health systems → 40% better outcomes, 80% less admin work

Raised a $55M Series A from leading investors
Built a team of 70+ AI experts from Tesla, Google DeepMind, NVIDIA, and Databricks
About Brain Co.
Brain Co. is an applied AI startup co-founded by Jared Kushner and Elad Gil, and backed by leading Silicon Valley builders including Patrick Collison and Andrej Karpathy.
We are building AI applications for the world's most important institutions, delivering impact on real-world problems across governments, healthcare systems, and critical industries.

This listing is sourced directly from Brainco's careers page and normalized into a canonical job model.