Provide cross-team technical leadership. Drive complex, multi-team initiatives from idea to launch. Partner closely with Product, Design, and Clinical leaders to ship measurable outcomes. Define and evolve architecture for core product areas. Design APIs, data models, and integration patterns. Raise the bar on reliability and performance. Embed testability in designs. Ensure new features are instrumented with high-quality analytics. Drive post-incident reviews and systemic improvements. Mentor senior and mid-level engineers. Help define and uphold engineering standards.