Dan Shay

Android Engineer

FlashNest • ZZP

Jun 2023 - Jan 2026 • 2 yrs 7 mos

Built and shipped an Android learning app for creating and studying flashcards with AI-assisted tutoring. • Architected an offline-first Android app using MVVM + Clean Architecture (UI/domain/data layers), accelerating feature delivery by 30% and reducing cross-feature coupling by 35% • Designed a reusable Jetpack Compose component system (Material 3, theming, state hoisting), cutting UI regressions by 40% and improving key screen load time by 25% • Built local persistence with Room (schema migrations + indexing) and resilient background jobs via WorkManager, enabling fully offline study and lowering sync-related defects by 60% • Hardened networking with Retrofit + OkHttp (timeouts, retries, caching, interceptors), decreasing failed requests by 35% in poor connectivity conditions • Integrated on-device sentence-transformers embeddings for semantic features (similarity/related concepts), achieving ~60ms median inference latency per query on mid-range devices, and reducing the token cost by up to 85% • Optimized embedding + search pipeline (batching, caching, lightweight indexing), shrinking peak memory by 25% and improving median response time by 45% • Re-architected Android state management and pagination using Kotlin Coroutines/Flow and Paging 3, lowering stale-UI and double-load edge cases by 50% and improving scroll smoothness by 20% • Instrumented crash reporting/analytics to prioritize fixes, lowering crash rate by 55% and sustaining 99.6% crash-free sessions among test users • Automated CI with GitHub Actions (build + unit tests + lint), decreasing regressions by 45% and cutting release verification time by 40% • Improved startup performance with baseline profile + lazy initialization, shrinking cold start time by 20% • Managed release workflows (versioning, ProGuard/R8, Play Console staged rollouts), maintaining 4.7/5 average rating in surveys filled out by test users, and stable rollouts with rollback-ready monitoring