• Design and build security controls across diverse layers (e.g., cloud platforms, OS, Kubernetes, networks, CI/CD) to defend against sophisticated adversaries and insider threats. • Improve the security properties of Tailscale by identifying opportunities for security and privacy features, bug fixes, defense-in-depth, and implementing them across our codebase. • Audit Tailscale infrastructure for technical security weaknesses, identifying mitigations or solutions, and driving them towards resolution. • Support engineering decisions with threat modeling and security analysis and expertise. • You will spend 25-50% of your time in this role writing software vs purely operational or governance security responsibilities.