AI Infrastructure Security Engineer
AI summary of the role
Hands-on security engineer to build and own the infrastructure security of an AI platform deployed in governments, hospitals, and critical industries.
What you’ll do
- Build security foundations: identity, isolation, secrets management, access control across cloud and Kubernetes.
- Harden infrastructure end-to-end: cloud networking, service meshes, CI/CD, data and model pipelines.
- Implement Zero Trust principles and machine identity across workloads.
- Own threat modeling and security for forward-deployed infrastructure (bespoke VPCs, customer environments).
What you’ll bring
- 5+ years in security engineering, infrastructure, or SRE with production systems at scale.
- Fluent in cloud security fundamentals (IAM, networking, KMS, secrets, isolation) across AWS, GCP, or Azure.
- Hands-on experience with Kubernetes, container security, and Linux systems.
- Experience with Infrastructure-as-Code (Terraform preferred) and building security guardrails.
Technologies
Kubernetes · Terraform · AWS · GCP · Azure · Zero Trust · service mesh · Go · Python · Linux
About Brain Co.
Builds a shared AI platform and vertical applications for governments and large enterprises to automate high-stakes workflows in permitting, healthcare, insurance, supply chain, and customer operations.
Series A
Source and classification
Internal deployment & tooling · Evidence for this classification:
peers on some of the hardest problems in applied AI. It’s the kind of work you'll still be proud of in ten years from now. 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. This is a hands-on builder role. 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. 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
More from the job description
Our Mission Rebuild how the world works, to make institutions work better for the people they serve. About Brain Co. Brain Co. builds AI-native operating systems for large, regulated institutions. Each system is built for a specific industry, powered by agents that push real workflows forward. Underneath it all is Atlas, our proprietary platform that keeps customers in control, secure by design, and never locked into one model. Why Now Brain Co. is entering its next phase of production deployments on a national scale with an elite team built from Palantir, Google, Meta, and Nvidia, and a growing footprint across government, insurance, health, and financial services. Joining now means shaping both the company and a new category of applied AI. Every project here ships to production and is expected to create measurable customer value and impact. You'll work alongside exceptional peers on some of the hardest problems in applied AI. It’s the kind of work you'll still be proud of in ten years from now. 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. This is a hands-on builder role. 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 h [... source excerpt omitted ...] grow the function as the company scales. 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. What You’ll Work On: Build the security foundations of our AI platform: identity, isolation, secrets management, and access control across cloud and Kubernetes environments. 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. Implement Zero Trust principles and machine identity a [... source excerpt omitted ...] ture 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. You Might Be a Great Fit If You: Have 5+ years of experience in security engineering, infrastructure, or SRE with hands-on experience building or securing production systems at scale. Are fluent in cloud security fundamentals (IAM, networking,
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