David Y.

Have a mobile product idea but need someone to own more than the code? I turn early-stage concepts into polished, launch-ready mobile products and, when the scope requires it, the full-stack platform behind them. I’m a Top Rated Plus Mobile Product Lead with 8+ years of experience, a 100% Job Success Score, and 1,800+ hours delivered on Upwork. I work hands-on with SwiftUI and Flutter, lead product and technical decisions, and remain directly accountable from planning through launch. What I can deliver: • Native iOS applications built with SwiftUI • Cross-platform iOS and Android apps built with Flutter • Custom backends, REST APIs, and third-party integrations • Authentication, payments, subscriptions, and push notifications • React web applications, admin dashboards, and role-based portals • AI-powered product features and intelligent workflows • App Store and Google Play preparation, submission, and release support Selected product experience: • Built the original SwiftUI application for Records, a visual album player featuring Apple Music integration, iCloud synchronization, subscriptions, and gesture-driven UX • Led complete mobile delivery for SPINE, a launched health-focused social platform with native iOS and Android applications • Led the end-to-end delivery of SayPlan, an AI-powered Flutter planner supported by a custom backend and administration platform • Currently leading the development of Fynee, a modern shared-expense product designed for couples, families, and roommates How I work: • I clarify the product vision, priorities, scope, and technical direction • You communicate directly with me throughout the engagement • I contribute personally to development and critical product decisions • You receive clear milestones, regular demos, and realistic progress updates • I focus equally on pixel-perfect UX, reliable logic, maintainable architecture, and release quality • I identify risks early and communicate practical solutions—not surprises For focused requirements, I work personally as a senior SwiftUI or Flutter developer. For broader products requiring mobile, backend, web, design, or parallel development, I can bring in my small in-house team through a delivery model agreed with you upfront. I remain your primary contact, contribute hands-on, and stay accountable for the outcome. Typical engagements: • Idea-to-MVP product development • Complete mobile and full-stack platform builds • Existing MVP improvement, stabilization, and launch • Ongoing feature development and product support • Selective senior SwiftUI or Flutter development If you’re looking for a technical partner who will treat your product like their own, send me your idea, current stage, and priorities. I’ll respond with practical next steps and an honest assessment of the best path to launch.