Hammad Ahmed

I am a Senior Android Engineer with 5 years of hands-on experience building real-world Android applications using Kotlin. As an Android Engineer, I focus on writing clean code, building stable apps, & delivering features users genuinely enjoy. I contributed to SAR/YamamaCM, an offline-first crowd management app for the Saudi Ministry of Transport during Hajj 2025 & 2026. Using Kotlin, Clean Architecture, MVVM, Room, &Retrofit, I implemented offline attendance & background synchronization, along with duty station & session management, leave extensions, duty assignments, meal confirmations, mapping, & Firebase related stuff. This experience strengthened my ability to build reliable mobile solutions under demanding field conditions and tight deadlines. As an Android Engineer, I have developed 5 SaaS based E-commerce, food & beverage, and B2C apps. Features include selecting multiple branches, browsing in b/w different categories/catalogs, carts, checkout, order tracking, loyalty, wallets, gift cards, and bookings. I integrated Checkout.com and Tap Payments SDKs for payments, session validation, transaction handling, and failure scenarios. As an Android Engineer, I translate business requirements & customer needs into solutions. I align features with business goals, user experience, security, scalability, and timelines. My skills as an Android Engineer include Kotlin, Jetpack Compose, Android SDK, Material Design 3, MVVM, MVI, Clean Architecture, SOLID, modularization, Coroutines, Flow, Hilt, Room, DataStore, Retrofit, REST APIs, OAuth 2.0, Firebase, offline sync, payments, ads, testing, Gradle, Git, GitLab, Jira, and CI/CD. As an Android Engineer, I prioritize performance, stability, security, & code quality. Results include 99.99% crash-free sessions, about 90% fewer ANRs, 50% faster cold starts, and 40% lower battery drain in mapping apps. As an Android Engineer, I have collaborated with backend engineers, UI/UX designers, QA teams, & product managers to clarify requirements, test features, resolve issues, and deliver on time. I have worked with distributed teams across Saudi Arabia, Egypt, and India. As an Android Engineer, I keep learning Android practices, Jetpack libraries, Kotlin-first development, & Jetpack Compose. As an Android Engineer, I am open to remote full-time roles, contract work, and freelance opportunities, combining technical skills, business understanding, and problem-solving to build scalable products. Need an Android Engineer experienced in Kotlin, SaaS apps, payments, offline-first architecture, & performance? Let’s connect.