• Lead the design and implementation of GitLab's authentication infrastructure layer, including Envoy proxy configuration, token services, and policy decision infrastructure • Solve critical infrastructure challenges including bi-directional gRPC tunnels, mTLS implementation, short-lived certificate management and service mesh architecture • Ensure infrastructure supports multiple deployment models: GitLab.com (millions of users), self-managed, Dedicated, and air-gapped environments • Lead performance optimization efforts for authentication decisions at scale • Implement infrastructure monitoring, observability, and debugging capabilities for distributed authentication systems • Collaborate closely with Authentication and Authorization teams, Platform/Infrastructure teams, Cells Architecture, and Runner teams • Hire, mentor, and nurture team health while scaling engineering capabilities