SUMMARY

• Implementation of Android mobile apps using MVC, MVP, MVVM, and various design patterns such as Abstract Factory, Builder, Façade, Command, Observer, Visitor, Proxy, Singleton, and more.
• Ensure effectiveness of SCRUM related meetings for Android app team.
• Expert in the interaction between various devices and different versions of Android.
• Experience with network programming and consuming third - party APIs.
• Experience with audio features, video features, graphics design, interactive design and animation, and Android Multimedia Framework.
• Developed application using components like Activities, Fragments, Broadcast Receivers and Services in Android.
• Experience in creating Android mobile apps in both Java and Kotlin using both Android Studio and Eclipse.
• Stays current on technology and new developments in Android and mobile app industry.
• Adept at UI implementation based on design specifications following Material Design guidelines, and using animations and UX optimization techniques, Fragments, Layouts, Compound Views, Custom Views, ListView and RecyclerView.
• Skilled in use of navigation drawer, floating action button, widgets and various UI techniques.
• Hands-on experience developing stable, reliable and backward compatible mobile applications.
• Setup proper interactions of the front-end design and implementation with backend servers.
• Proficient in Working with different Android frameworks(Bluetooth, Location, Camera, Notifications, Maps).
• Experience with SQLite Database, Google Maps API, GPS Location data, Camera and Push Notifications.
• Responsible for the Android business logic that uses Json queries for getting data from the backend systems using Retrofit, Volley, RxJava and AsyncTask.
• Threading with loopers, loaders, and handlers.
• Applies Google’s best practices for mobile environments, i.e., networking, memory management, battery status, responsive and intuitive design, managing multiple screen sizes, identifying app installations, internationalization.
• Utilized Espresso, JUnit, Mockito and simulated design patterns to test and develop applications.

PROFESSIONAL EXPERIENCE

Senior Android Developer

Confidential

Responsibilities:

• Participate in architecture migration from MVP to Kotlin based MVVM architecture using lifecycle aware components like LiveData, ViewModel, Room and ViewBinding
• Implement Jetpack Compose such as composable functions, setting the content to the screen, and updating content
• Wrote test cases across multiple features for ViewModels using KotlinMockk, Espresso for automated UI and Robolectric integration testing framework
• Construct complex modules, components, reusability of classes and decoupling of dependencies using Dagger2 dependency injection
• Resolve major bug relating Firebase push notification implementation by configuring certain interfaces to receive latest offers and discounts information from backend
• Implement BrainTree SDK to use credit card tokenization to save customer card information and accept more payment types for PayPal, Apple Pay, and Android Pay
• Work on Get, Post, Put HTTP API request, parse XML data using XML Serialization library and display in custom list view with headers
• Measure CPU, memory, network, and battery resources performance with Android Profiler (Energy Profiler, Network Profiler, CPU Profiler)
• Work with UX, UI, Content researchers, architecture and other delivery teams to help develop right solutions looking from technology and also from client's perspective
• Participate in code reviews and contribute to raising the quality of the product using best coding practices, static code analysis and material design principles
• Help to build and define the API contracts between applications and middleware systems using Swagger, Mockserver API
• Apply bridge design pattern to decouple the interfaces from implementation and hiding the implementation details from the client programs
• Configure GCM with MixPanel SDK to enable push notification services to receive alerts
• Integrate End of List Listener for use of detecting when the user has scrolled to the bottom and Pull-to-Refresh functionality
• Write code to synchronize backend data locally in SQLite database for offline usage and develop Preferences setting fragment
• Work closely with other developers and end users to ensure technical compatibility and user satisfaction
• Optimize for code size by applying custom ProGuard shrinking and optimize minimal allocation of objects and bytes

Senior Android Developer

Confidential

Responsibilities:

• Developed in Android SDK (Android 5.1 - 8.1) in Android Studio, coding exclusively in Kotlin, using the latest version of Android Studio.
• Developed modules in Kotlin using MVVM app architecture for ease of maintainability and extensibility, as well as improved quality testing.
• Converted from Rx1 to Rx2 including support for both Java and Kotlin
• Converted old responses into using Rx2 error handling methods
• Worked in 2-week sprints beginning with Confidential Planning and ending with Confidential Retrospective.
• Used Android JetPack’s LiveData to simplify data updates across the lifecycle and configuration changes for the UI.
• Collaborated with the web application development team to ensure proper integration between mobile application and web application.
• Also used GSON converter to convert the retrofit JSON response to the java object.
• Worked with Git and I managed the Git repository, multiple branches.
• Helped mentor junior developer in adapting to Android from his background in Java.
• Working with data binding with Android JetPack, and custom attributes to format and process data contained in model resources.
• Used Retrofit and RxJava to consume RESTful web services and handle multithreading on background for smooth performance.
• Implemented Firebase for a real-time database, and Firebase Push Notifications.
• Worked with source code interoperability, coding in both Java and Kotlin with development in Android Studio IDE.
• Configured multiple analytic tools to get valuable information on a post-install state: Crashlytics, Mixpanel, Flurry, Answers.
• Used lazy loading of heavy resources; caching images on LRU cache as well as files on worker threads for performance.
• Developed Android app screens and its workflow using Activity and Fragments
• Implemented updated views for UI using Recycler View, View Pager and Navigation Drawer.

Android Developer

Confidential

Responsibilities:

• The Android development team used Slack, Skype, Jira, Bitbucket, and Git as team project tools.
• The Android team was an Agile environment with Confidential planning, Confidential Retrospective and Confidential backlog.
• Performed code reviews and supported team made in reviewing and refactoring Java code for maintainability, testability and reusability.
• Provided task estimations including time, resources and effort.
• Used OkHTTP, Retrofit2, and GSON to make REST calls and parse json from APIs
• Set-up build flavor for using a mock service for integration testing
• Worked on migrating financial services offered on website to Android app
• Consumed REST services to bind data to views
• Used MVP architecture as the basis for the Android app with design patterns for specific modules such as Decorator, Visitor, Façade, and Singleton.
• Created generic custom views that were reusable across all screens
• Used material design principles and followed style guides to create UI
• Used lazy loading of heavy resources; caching images on LRU cache as well as files on worker threads for performance.
• Worked in layouts and UX design and layout using both XML, and custom Android views.
• Implemented Challenging UX components with browser top/bottom pane animation on scrolling the web content.
• Flattened existing nested layout hierarchies using Constraint Layout
• Used Dagger 2 and Butter Knife for dependency and view injection
• Integrated Firebase Crash Reporting for event logging and monitoring
• Used Google Analytics crash reports to improve app performance/ratings
• Conducted daily scrums to discuss app ratings and possible improvements
• Integrated deep linking between Android and Website
• Junit and Mockito for unit and instrumented tests.
• Implemented data persistence using SQLite and SQLiteOpenHelper.
• Used faster image loading libraries of Glide to manage bitmaps to improve Android app performance with Picasso for product images for high resolution.

Android Developer

Confidential

Responsibilities:

• Implemented EventBus to facilitate the communication between processes in the app.
• Used Android Annotations for dependency injection
• Working with Android Device Monitor for monitoring CPU load, heap size and memory usage
• Supervised the creation of the testing suites developed with Espresso and Mockito.
• Used APIs from different API levels to support backward compatibility.
• Used Butter Knife for view dependency injection
• Refactored un-optimized pieces of code to guarantee maximization in the use of resources.
• The program was developed in Java using the Eclipse IDE and the Android Development Tool (ADT).
• Use of services to run Java classes for the back work.
• Build new features to enhance the UX for consumers.
• Used Volley library for asynchronous requests to the server, and GSON to retrieve information from an internally programmed API and make the conversion between the JSON and POJOs.
• Added selectors and animation effects on UI/UX elements to enhance the User Experience.
• Extensive use of Fragments to enhance user interface experience.
• Efficient and clean code integration and backup using Jenkins CI server and Git for code base and version control, commits and merges.
• Debugged and tested the application using Logcat, DDMS and TraceView on different devices.
• Implemented Crashlytics to monitor crashes and exceptions and user app analytics data.

Android Developer

Confidential

Responsibilities:

• Dalvik Debug Monitor Server (DDMS) for debugging and testing.
• Constructed the user interface by using list view, custom view, compound view and various layouts.
• Used the Fragment capabilities to handle multiport views and different screen size devices.
• Tested the user interface implementing Espresso.
• Implemented Material design feature of RecyclerView, toolbar, CardView
• Tested the application on various devices and emulators to determine compatibility.
• Incorporated the communication between the application and the other Android applications backed by the customer.
• Implemented full social network integration with Facebook, Twitter, and YouTube SDKs.
• Created Widgets to help customers manage the launcher.
• Debugged and tested the application using Robolectric
• Including support for backward animation using NineOldAndroids library.
• Created multiple Content Providers with a native approach to handling UI asynchronous updates.
• Enhance the User Experience with the implementation of the Tab Navigation.
• Implemented Dagger to work with a Dependency Injection environment to help with the unit testing.
• Attended the SCRUM meetings and met deadlines.

Android Developer

Confidential

Responsibilities:

• Tested the application using Robolectric.
• Build Activities using compound and customized views.
• Tracked issues and tasks in Jira and documented the app in Confluence.
• Implemented automated testing with Robotium and tested with continuous integration on Jenkins with emulators.
• Use of social media libraries, Facebook, Twitter and Google Plus.
• Implemented several design patterns such as MVP, Singleton, and Observer.
• Enhanced the UI/UX by adding custom views and compound views and Navigation Drawer.
• Upgraded the app UI with Google’s Material Design new specifications.
• Used support libraries to ensure backward compatibility with older OS versions.
• Integrated payment methods such as Android Pay, Visa API, MasterCard API.
• Under limited supervision, responsible for developing mobile applications and software components.
• Participated in requirements definition, design, and reviews.
• Enforced Object Oriented Principles in Android.
• Developed the act in Eclipse IDE and integrated dependency injection with Dagger.
• Implemented the best practices for Android mobile development with their main components: Activities, Services, Content Providers and Broadcast Receivers.
• Worked with the UI/UX team for the new app skin redesign.
• Worked closely with the back-end team to implement the electronic payment capabilities.
• Created small testing suites with JUnit and the Eclipse IDE capabilities.
• Used Picasso to display images obtained from URL