Mustinsar Saeed

Sr Android Developer

CloudES • Full-time

Dec 2024 - Present • 1 yr 8 mos

Senior Android Developer with 5+ years of experience designing, developing, and maintaining production-ready native Android applications. Working at CloudES since December 2024, contributing to scalable mobile products using Kotlin, Jetpack Compose, XML, Material Design, and modern Android development practices. Responsible for implementing new application features, converting UI/UX designs into responsive Android interfaces, integrating REST APIs, managing application state, and improving existing codebases. I follow MVVM and Clean Architecture principles to create modular, testable, and maintainable applications while reducing technical debt. My work includes: • Native Android development with Kotlin and Java • Jetpack Compose and XML-based UI development • MVVM, Clean Architecture, and SOLID principles • REST API integration using Retrofit and OkHttp • Kotlin Coroutines, Flow, StateFlow, and lifecycle-aware programming • Room Database and DataStore implementation • Dependency injection using Hilt and Dagger • Firebase services, including Crashlytics, Analytics, Authentication, and Cloud Messaging • Google AdMob and UMP consent integration • Google Play Billing and subscription implementation • Navigation Component and deep-link handling • Android app bug fixing, crash resolution, ANR investigation, and performance optimization • Unit testing, UI testing, code reviews, and release validation I collaborate with designers, backend developers, QA engineers, and product stakeholders in an Agile environment. I also investigate production issues using Firebase Crashlytics, Logcat, Android Studio Profiler, and Google Play Console reports. My focus is delivering stable, maintainable, and user-friendly Android applications while following Android lifecycle, performance, security, and Google Play policy best practices.

Native Android Developer

Logic Triangle Consulting • Full-time

Apr 2021 - Dec 2024 • 3 yrs 8 mos

Senior Android Developer | Kotlin, Java, AI Integrations Worked as a Senior Android Developer, contributing to the design, development, maintenance, and optimization of production-ready mobile applications across multiple industries. My primary focus was native Android development using Kotlin, Java, XML, Jetpack Compose, and modern Android development practices. I developed scalable and maintainable applications using MVVM, Clean Architecture, SOLID principles, Kotlin Coroutines, Flow, Hilt, Retrofit, Room Database, DataStore, and Firebase. My responsibilities included implementing new features, integrating REST APIs, managing local data storage, translating Figma designs into responsive Android interfaces, and supporting applications from initial development through testing and production release. I regularly investigated and resolved application crashes, ANRs, memory leaks, performance bottlenecks, Gradle issues, device compatibility problems, and Google Play Console errors. I also refactored legacy codebases, improved application architecture, optimized startup and runtime performance, and strengthened lifecycle handling to improve stability and maintainability. In addition to native Android development, I contributed to selected Flutter projects for cross-platform applications, including feature development, debugging, and performance improvement. I also integrated AI-powered capabilities such as chatbots, intelligent automation, and third-party AI APIs into Android and Flutter applications while considering security, scalability, and user experience. My work also included Firebase services, push notifications, Crashlytics, Google Maps and location features, AdMob monetization, UMP consent management, Google Play Billing, and Play Store release preparation. I collaborated with designers, backend developers, QA teams, and project stakeholders to deliver reliable mobile applications aligned with product and business requirements.