Senior Mobile Infrastructure Engineer | AI Healthcare Startup (Santa Clara)

About Day One PartnersDay One Partners is a search firm that partners with venture capital firms to help build high-growth startups. We lead confidential searches for leadership and critical roles across a range of company stages, industries, and functionsAbout the RoleJoin a fast-growing AI healthcare technology company building next-generation mobile experiences that help clinicians focus more on patient care. This is an opportunity to shape the foundation of a mission-critical mobile platform powering real-time audio, AI-driven workflows, and offline-first experiences used in complex clinical environments.What You'll Do:Build and evolve a cross-platform mobile infrastructure supporting iOS, Android, and Flutter applicationsImprove app reliability, performance, observability, and release processes across mobile systemsDevelop scalable frameworks for audio capture, offline sync, caching, networking, and background executionPartner with product, AI, backend, and design teams to deliver seamless clinician-facing experiencesMentor engineers and help define the future of mobile architecture and engineering standardsWhat You'll Bring:5+ years of professional mobile engineering experience with strong iOS and/or Android expertiseDeep knowledge of Swift, Kotlin, mobile architecture, CI/CD, testing, and performance optimizationExperience building production-grade mobile infrastructure in cross-platform environmentsFamiliarity with Flutter or willingness to ramp quickly into a Flutter-based codebaseStrong ownership mindset and ability to thrive in fast-moving, collaborative environmentsWhy You'll Love This Role:Work on cutting-edge AI, audio streaming, and offline-first mobile experiencesHelp shape highly impactful healthcare technology used in real-world clinical settingsInfluence technical strategy and grow into broader mobile platform leadership opportunitiesCompetitive compensation, equity, and high-growth career potential