SUMMARY

• 7+ years of experience in Android.
• 5 published Android apps.
• Experience using Android Studio in Android app design and development.
• Skilled coding new Android mobile apps from scratch as well as refactoring, transitioning, and revising existing apps.
• Demonstrated skill in Android mobile app IDE coding in Java and Kotlin.
• Experience converting Java arrays to mutable and immutable lists to reduce code overhead and provide consistency.
• Experience refactoring Java code to Kotlin, eliminating null pointer exceptions.
• Experience implementing new features in Kotlin.
• Use RxJava to handle teh responses from teh web services.
• Work closely with Project Managers, Product Managers, and Stakeholders to ensure app developments meet specifications and successfully drive corporate strategy.
• Mentor developers about best practices.
• Use sync adapters to load changed data from server and to send modified data to server from app.
• Work with GSON and Jackson library to parse JSON files on teh Android project.
• Use intent services and Retrofit with OkHTTP3 to handle calls and processed JSON objects with GSON converter.
• Use of a variety of views: CardViews, RecyclerViews
• Implement LRU Cache to increase teh performance of ListView scrolling.
• Develop UI for both landscape and portrait Screen orientations using qualifiers.
• Use of Android JetPack for Data Binding to communicate between ViewModels and UI components.
• Use of Reactive - X RxJava and RxAndroid.
• Hands-on with Google Material Design, TextViews, WebViews, Navigation Drawer, Floating Action Button, Widgets, Compound View, Custom View, RecyclerView, View Pager and Tab Layout, Fragments.
• Experience writing test cases and testing with Robotium, Junit, Espresso, Mockito, etc.
• Worked with continuous integration servers (Jenkins, Hudson, Travis) and implemented simultaneous testing on various devices.
• Experience with Model-View-Controller (MVC), Model-View-Presenter (MVP), and Model-View-ViewModel (MVVM) software architectures.
• Apply design patterns such as Delegation, Fac ade, Abstract Factory, Builder, Singleton, Observer, etc,
• Work with cross-functional teams to ensure excellence in app performance and user experience.
• Oversight of offshore development teams to maximize productivity and coordinate tasks.

TECHNICAL SKILLS

Architectures: Model-View-Controller (MVC), Model-View-Presenter (MVP), and Model-View-ViewModel (MVVM)

Design Patterns: Delegation, Fac ade, Abstract Factory, Builder, Singleton, Observer

Development Platforms: Android SDK, Java SDK, Firebase

Methodologies: Material Design, Agile Development

Threading: AsyncTask, IntentServices, Handlers, Loopers, Loaders

Back-End Integration: Retrofit, Volley, OKHttp

UI/UX: Navigation Drawer, RecyclerView Animator

Push Notifications: Google Cloud Messaging (GCM), Firebase Cloud Messaging (FCM)

Energy & Memory Management: BlueTooth Low Energy, ARC, Dalvik

Programming Languages: Java, Kotlin

IDE: Android Studio, Eclipse

Development Tools: Git, GitHub, JIRA, Jenkins, Fabric

Android Development: Retrofit, JobScheduler, EventBus,, Bluetooth Low Energy, Push Notifications, Dagger, MediaPlayer, RxJava, Google Analytics

Image Management: Picasso, Glide, Fresco

Databases: SQL, MySQL, SQLite, Firebase, Parse, JetPack

Testing: Robotium, Espresso, JUnit, Charles Proxy

Continuous Integration: Jenkins, Travis, Hudson, Bitrise

Dependency Injection: Dagger 1 Dagger 2, Butter Knife, IcePick, AndroidAnnotations

Web Services & Scripting: REST, SOAP, JSON, GSON, XML, AJAX

Debugging: DDMS tool, ADB, LeakCanary, Firebase Crash reporting, Crashlytics

PROFESSIONAL EXPERIENCE

Lead Android Developer

Confidential, New York, NY

Responsibilities:

• Applied KanbanandScrumusingTargetprocessmanagement software.
• Built application using MVVM architectural patterns.
• Implemented Android Architecture lifecycle aware components and use LiveData to build data objects dat notify views when teh underlying database changes.
• Programmed in Kotlin supported by RESTful services.
• Programmed in Java supported by RESTful services.
• Designed/developed app using API/SDK and business embedded logic to achieve mobile app’s desired functionality.
• Applied Android JetPack components such as Room, Navigation and LiveData.
• Participated in software design, estimation of development tasks, testing, QA process, pair programming, troubleshooting and codedebugging.
• Downloaded initial settings data usingRESTFulWS and posting values to APIserver.
• Implemented TDD usingMockitoand Espresso testing tools to test uses cases in business and abstract layer of thearchitecture.
• Created Custom Views for Scrolling, Customized items, Customized label, Eventlisteners.
• Applied Apache CommonsCodecsoftware to provideimplementationof common encoders anddecoderssuchas Base64,Hex,PhoneticandURLs.
• Configured a new Android wear application using Node API and WatchViewstubUI.
• Replaced SQLitewithRoom database.
• Mentored a junior developer.
• Used reactive frameworks such as RxJava, RxAndroid, RxBluetooth, and RxKotlin.
• Used Jenkins for continuous integration (C/me).
• Configured Git and Bitbucket servers as teh software version control tools.
• Used Jira for ticket, make sure dashboard everyone is assigned work and backlog defect tickets are single digits.
• Debugged and fixed access to Bluetooth settings, network connectivity, Wi-Fi Multicast reception, and connect and disconnect from Wi-Fi.

SENIOR ANDROID MOBILE APP DEVELOPER

Confidential, New York, NY

Responsibilities:

• Applied pair programming within an Agile project execution framework complete with daily Scrums.
• Architected teh app using Data binding library to operate with observable data objects, generated customized binding classes, and supported two-way data binding.
• Used Android Studio to develop teh screens for teh application using MVVM design pattern.
• Programmed code in Java and Kotlin.
• Developed new features in Kotlin to reduce codebase with data classes and extension functions.
• Implemented several libraries for Kotlin effort such as RxKotlin, Kotlin-kapt and Android KTX.
• Applied automatic backup support via Google Drive.
• Established continuous integration using Jenkins CI.
• Synchronized data between Android device and web servers.
• Implemented automated execution and integrated account management and authentication into data transfer.
• Implemented a rich user interface per UI/UX and Google's Material Design specifications. Integrated Android-Query (AQuery) library for asynchronous tasks and manipulated UI elements to display distance traveled for mileage reimbursement.
• Integrated Google Play billing service API for buy one-time products, query for in-app product details, and test acnoledging purchase with license testers.
• Enabled teh user to search and pinpoint desired listings based on multiple varying inputs via SearchView and Content Provider allowing for customized findings.
• Designed and integrated a "Terms and Conditions" screen where teh user can review, in detail, teh "Terms of Service" and "Licensing Agreement".
• Validated asynchronous operations whose results affect subsequent operations in a UI test using Idling Resource Espresso.
• Provided backwards-compatible notification API with Wear and Auto support, media playback and routing. Created modules, components and custom scopes using Dagger2 and perform loose coupling.
• Worked with ScribeJava OAuth library to sign HTTP messages and request tokens from an OAuth service provider.
• Converted Relative/Linear layouts to ConstraintLayouts to flatten teh view structure and improve performance.
• Created a generic Retrofit wrapper class which are put in an internal library to replace Volley and in corporate RxJava 2 for API calls.
• Coupled with Retrofit and RxJava to enable teh UI to perform flawlessly and reactive to changing data.

Android Application Developer

Confidential, Baltimore, MD

Responsibilities:

• Assigned to a dev team dat carried out teh software development lifecycle (SDLC) in alignment with an Agile project methodology dat included teh practices of Scrums and Sprints.
• Utilized Eclipse IDE and teh Android Development Tool (ADT).
• Implemented MVP architecture and various design patterns (Singleton, Proxy, Observer, Façade).
• Programmed in Java and Kotlin using Android Studio IDE.
• Developed new Kotlin modules and migrated existing code into Kotlin.
• Added push notification features with Firebase Cloud Messaging for Android.
• Utilized teh Android 3rd-party libraries: RxJava, Butterknife, and Retrofit.
• Added selectors and animation effects on UI/UX elements to enhance teh User Experience.
• Built new Android features to enhance teh UX for consumers.
• Tested teh user interface using Espresso.
• Debugged and tested teh application with Espresso, and Junit.
• Wrote unit tests in Junit and Mockito.
• Constructed teh user interface by using list view, custom view, compound view and various layouts.
• Created innovative solutions in media streaming and mobile user experience.
• Implemented Dagger for Dependency Injection and to halp with teh unit testing.
• Helped implement full social network integration with Facebook, Twitter, and YouTube SDKs.
• Coded Connection and Operation error handling module to catch display messages to users during Bluetooth communication.
• Used Bluetooth low energy and Leak Canary to solve mobile networking performance issues
• Used Activity, Intents, Fragments, Services, Broadcast Receivers, notifications, Content Providers, and Media Players for building teh app.
• Created Widgets to halp customers manage teh launcher
• Used Picasso for loading images and management of media.
• Handled fragment data retention to ensure data integrity in Android on-screen rotation, with teh onSaveInstanceState and onRestoreInstanceState methods.

Android Developer

Confidential, Santa Monica, CA

Responsibilities:

• Worked on a team of 8 developers and 2 QA specialists.
• Collaborated with cross-functional teams to define, design, develop and deploy app.
• Accepted joint responsibilities with teh team for converting teh Product backlog into 'Done'.
• Contributed to continuous improvements in teh team for greater efficiency, quality, and productivity.
• Worked existing clean code architecture in MVP and created shopping module, add-to-basket module, and customer profile module.
• Programmed in Java and Kotlin using Android Studio.
• Assisted refactoring teh codebase from Java to Kotlin.
• Used reactive frameworks such as RxJava, RXKotlin, and RxBluetooth.
• Worked closely with UI/UX team for doing Material Design and applied custom animations on views and assigned proper spacing for iconography.
• Created multiple services for connecting with company backend to retrieve user account details, billing, and payment.
• Implemented Google Play Billing system and configured BillingClient and override on ConsumeResponse in teh MVVM design pattern.
• Included DaggerMock testing library to test Dagger components in Unit test cases in TDD manner for presentation layer.
• Programmed modules, components, scopes to inject view models, and network objects using Dagger Creational pattern.
• Replaced Volley library with RxJava, Retrofit library to make asychrous API calls to get user-profile and monthly stats data in custom view.
• Added custom deep links dat teh user will be sent to if teh app is already installed and leveraged teh power of Google Services to send invites to friends.
• Enabled Google Pay to process payments from users, integrate Payment data cryptography for merchants and use sample tokens to test integration.
• Performed AIDL and defined teh programming interface dat both teh client and service agree upon to communicate with each other using inter-process communication (IPC).

Android App Developer

Confidential, Rockaway, NJ

Responsibilities:

• Followed Full Agile methodology: Scrum, Planning, Grooming and Demo ceremonies strictly followed.
• Produced teh Android app in Android Studio with coding in Java, and both native and third-party frameworks.
• Applied MVP architecture and design patterns Singleton, Observer, Factory, Façade, Proxy, and Builder.
• Created wireframes using Adobe Photoshop for app design and architecture.
• Worked effectively with UI designers who are obsessive about pixel perfection.
• Used instance handlers for Java threading separated from teh Android user's interface thread.
• Used native and third-party technologies to optimize teh app functionality including Java, Parse, Volley, SQLite, Fragments, Picasso, Android Studio, JSON,SQLCipher, Spongy Castle, Git, Jenkins.
• Optimized RESTcalls for better performance using differentAndroid appthreads.
• IntroducedAndroidNavigation Drawer and Tabs, as well as custom and compound views to teh project.
• Enhanced teh UI/UX to follow theguidelines provided by AndroidMaterial Design.
• Utilized Git version control tool as source control management system.
• Integratedsocial networking APIs such as Facebook and Twitter into teh Android app.
• Introduced Push Notifications to keep teh user engaged with Parse for Android.
• Tracked project planning and development lifecycle with JIRA.
• Appliedexpertisein development ofwell-designedAndroid styleuser interfaces.
• Worked with design team to createa user-friendly interfacefor theAndroidapp.
• Trained and mentored new team members on teh team in coding best practices, like memory management, network consumptionin Android.