Cloud Security Engineer
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About the role
Braintrust is the AI observability platform. By connecting evals and observability in one workflow, Braintrust gives builders the visibility to understand how AI behaves in production and the tools to improve it. Teams at Notion, Stripe, Zapier, Vercel, and Ramp use Braintrust to compare models, test prompts, and catch regressions - turning production data into better AI with every release. We're looking for a hands-on Cloud Security Engineer to own the security posture of our multi-cloud infrastructure and customer hosted data planes. You'll work across AWS, Azure, and GCP, harden our Kubernetes and Terraform stack, and keep the platform secure without slowing engineering down. This is a senior IC role. You'll write code, build paved-road controls, ship detections, and partner with customers on deployment. If you're excited to use agentic coding tools to operate at the pace of a much larger team, we'd love to work with you.