Talha J

Mobile Engineer

Marham • Fulltime

Nov 2022 - Oct 2024 • 1 yr 11 mos

Mobile Engineer on the Marham Android team, one of Pakistan's leading healthcare platforms, connecting patients with verified doctors for in-clinic appointments, video consultations, lab tests, medicine delivery, and an online pharmacy. The app serves hundreds of thousands of active users across Pakistan and is consistently ranked among the top medical apps on the Play Store. Key responsibilities and contributions: - Designed, built, and shipped end-to-end Android features in Kotlin and Java, owning work from spec through release - Migrated significant portions of the legacy Java codebase to Kotlin and modernized the architecture to MVVM with a clean Repository layer - Worked across core product flows including doctor search and booking, video consultations, e-pharmacy checkout, lab test ordering, and patient profiles - Integrated REST APIs using Retrofit and OkHttp, with Room for offline caching and reliable local persistence - Integrated third-party SDKs for video calling, payment gateways, push notifications, deep linking, and analytics - Implemented Firebase Crashlytics, Analytics, and Remote Config to monitor stability and run gradual feature rollouts - Investigated and resolved production crashes and ANRs, measurably improving the app's crash-free user rate - Optimized app startup time, screen rendering, and memory usage on low-end Android devices common in the local market - Implemented in-app purchases and subscription flows using Google Play Billing - Wrote unit and instrumentation tests, and participated in code reviews to maintain code quality and consistency - Collaborated daily with backend, product, design, and QA teams in an Agile workflow, contributing to sprint planning and release cycles - Delivered consistent bi-weekly production releases with zero major regressions Tech: Kotlin, Java, MVVM, Coroutines, Retrofit, Room, Hilt, Firebase, Google Play Billing.