• End-to-end technical ownership of the mobile architecture across iOS and Android• First technical review point for new product and feature requests — shaping what gets built and how before implementation begins • Definition and evolution of mobile engineering standards, code quality practices, and shared patterns • Mobile engineering health metrics: crash-free rate, release cadence, performance benchmarks, and technical debt posture • Technical direction of the mobile codebase: architecture patterns, modularisation strategy, and shared library boundaries • Cross-functional technical alignment with Product, Design, QA, Backend, and DevOps • Mentoring of iOS and Android engineers — raising the technical bar across the team, not just within your own stack