• Lead key engineering and product decisions for the macOS app. • Write, test, and ship production-quality code that scales to millions of users. • Maintain and evolve complex app architecture with a focus on performance and stability. • Work within a cross-functional team, partnering with designers and PMs to shape features from concept to launch. • Participate in product planning and roadmap discussions. • Drive continuous improvement in code quality, CI/CD processes, and development workflows.