• Define and implement our infrastructure architecture from scratch • Rebuild our CI/CD pipeline to better scale with a growing team • Own all infrastructure-as-code and environment provisioning • Design our observability strategy (metrics, logs, traces, alerting) • Establish best practices for reliability, scaling, and incident response • Own security fundamentals (secrets, access control, production hardening) • Partner with application engineers to create a fast, reliable developer experience • Make foundational decisions on cloud, tooling, and architecture • Contribute as an application developer when needed