SUMMARY

• Solid understanding of Management Information Systems (MIS).
• Proven hands - on technical skills with leading development environments/frameworks such as Android Studio, React.js, etc.,
• Demonstrated hands-on skill with architecture and design patterns such as MVVM, MVP, MVC, Presenter, REST, Singleton, Builder, Factory, etc.
• Programming language coding skill with Kotlin and Java.
• Strong understanding of OOP and software design patterns
• Experience with Agile and working in teams using Scrum
• Experience with Android third-party libraries like Retrofit, Picasso, Glide, Location API, Google Maps, Stripe, PayPal, Dagger, Android Annotations
• Well versed in newest patterns like reactive programming with RxJava and Dependency Injection
• Hands-on experience with Java and Kotlin
• Strong ability to work with teams from other departments to achieve cross-functional goals and meet the specified requirements
• Strong written and oral communication skills
• Experience with Mockito, Junit, Espresso and simulated design patterns to test and develop applications
• Hands-on experience with debugging and profiling Android applications
• Ability to mentor less experienced team members on technical matters
• Well versed in Material Design guidelines
• Ability to problem-solve and manage multiple priorities in fast-paced, deadline driven environments
• Hands-on experience with continuous integration tools like Jenkins and Travis CI
• Adept with development/design standards and best practices in Android

TECHNICAL SKILLS

Programming Languages: Kotlin, Java, C#, VB.NET, HTML, CSS, JavaScript, jQuery

Development IDEs: Android Studio, Visual Studio, Visual Studio Code, SSMS, Eclipse

Databases: SQLite, Room Database, Firebase Realtime DB, MySQL, MS SQL

Networking/Web Services: REST, JSON, Retrofit, GSON, OkHTTP, WebAPI2, Volley

Events: EventBus, Otto

Threading: RxJava, IntentServices, Handlers, JobScheduler

Dependency Injection: Dagger2, AndroidAnnotations

UI/UX: Material Design, Material Dialogs, Calligraphy, ExoPlayer, VideoView, Chromecast, Push Notifications

Security: AES/Cipher, Spongy Castle

Messaging: Urban Airship, Google Cloud Messaging

Payment Processing: BrainTree SDK

Debug/Testing/Performance Frameworks: Junit, Espresso, Hugo, Robotium, Mockito, LeakCanary, Doze Mode, Android P, Timber, Bluetooth BLE

Version Control: Git, GitHub, GitLab, TFS

Architecture Design Patterns: MVVM, MVP, MVC

Design Patterns and Practices: Adapter, Factory, Builder, Singleton, Extension Function, Data Class, Handler, Parceler

Project Management: JIRA, Sketch, MPAndroidChart

Software Development Methodologies: Agile, Scrum, Waterfall

CI/CD: Circle-CI, Jenkins, NDK, Firebase

Analytics: Crashlytics, Google Analytics, Mixpanel

Other: JetPack, IoT, Services

PROFESSIONAL EXPERIENCE

SENIOR ANDROID DEVELOPER

Confidential, McLean, VA

Responsibilities:

• Led team to refactor portion of codebase from Java to Kotlin.
• Refactored code from MVP to MVVM to streamline codebase and reusability of logic.
• Created a Background Service to update JSON stored locally on the device.
• Implemented scrollable RecyclerView to display searched properties and resorts listings.
• Improved image loading from cache using Glide.
• Cached user data locally into SQLite database for offline viewing.
• Refactored methods to reduce the method count to under 64k to avoid multidexing.
• Improved real-time room quotes and availability by performing asynchronous network calls using Retrofit and RxJava.
• Parsed data using built in GSON Converter to populate detailed room information when selecting room types
• Detected memory leaks using Leak Canary.
• Implemented unit/instrumentation testing using JUnit and Espresso.
• Encrypted and stored user settings in shared preferences.
• Supported multiple language and regional support using Android string resources.
• Mentored junior developers throughout the Agile lifecycle.

SENIOR ANDROID DEVELOPER

Confidential, Maryland Heights, MO

Responsibilities:

• Worked with team on QA for the Kotlin-based application.
• Worked with team on QA for the application.
• Assisted on the development of the Gameplan/Dashboard Bff.
• Reviewed code for every pull request by teammates.
• Updated Endpoint from Big Data hub to use Kong API services,
• Applied peer programming practice.
• Configured device IP filter for the application to blacklist certain devices/locations.
• Enabled feature to track vehicles when they are outside of hub locations (in shop or elsewhere) using geofencing.
• Implemented a feature to check feature flags to throttle data access depending on location as a means of reducing the server load.
• Increased test coverage from 30% to 70% peak.
• Implemented Soathree to add a tray on Electric Vehicle Trip Plsnnrt.
• Implemented TDD by creating unit tests for all development using Mockito and Espresso for testing.
• Utilized retrofit to consume RESTful APIs.
• Used Amazon Web Services (AWS) as backend system for android application.
• Implemented newer features in Kotlin and migrated some existing code into Java.
• Used RecyclerView to display all list information inside of the application to the user
• Implemented databinding with binding adapters and Android Databinding.
• Worked in an agile scrum environment with daily stand ups and 2-week sprint.
• Programmed in the Dart Programming Language.
• Applied understanding of Cross platform performance concerns and conventions when using Dart.
• Used Flutter (Dart Front-end) to craft highly responsive application Front Ends that adhere to Material Design.

SENIOR ANDROID MOBILE APP DEVELOPER

Confidential, New York, NY

Responsibilities:

• Created/edited/deleted all receipt categories.
• Applied automatic backup support via Google Drive.
• Applied pair programming within an Agile project execution framework complete with daily Scrums.
• 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.
• Architected the app using Data binding library to operate with observable data objects, generated customized binding classes and supported two-way data binding.
• 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 acknowledging purchase with license testers.
• Enabled the 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 the user can review, in detail, the "Terms of Service" and "Licensing Agreement".
• Validated asynchronous operations whose results affect subsequent operations in a UI test using Idling Resource Espresso.
• Provide 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 all of the Relative/Linear layouts to ConstraintLayouts so we can flatten the 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.
• Focused on implementing rich user interface per UI/UX and Google's Material Design specifications. Used third party Z-Xing library to scan items using barcode scanner.

SENIOR ANDROID DEVELOPER

Confidential, San Francisco, CA

Responsibilities:

• Participate in application planning, architecture, and design
• Execute Android performance tuning and crash reporting applications.
• Implement Android services to synchronize the latest news, getting them from RESTful web services.
• Attend SCRUM meetings to track app development progress.
• Developed rich application layouts following Material Design.
• Consumed REST API to display user history on the user interface.
• Develop test cases using Junit and tested the User Interface using Espresso.
• Implementation of dependency injection using Dagger2 for object references.
• Follow Test-Driven Development (TDD) approach while developing the application.
• Identify issues by root cause analysis during test cycles.
• Mentored Product and QA team on the nuances of Android devices.
• Diagnose and fix bugs that cause unintended product behavior.
• Design URIs needed to access and modify the exported Content Provider data.
• Create Material Design layouts with different animations optimized for the ultimate User Experience.
• Maintain high unit test coverage and continuous integration principles.
• Implemented RESTful data consumption using Retrofit with an OkHTTP client, a GSON converter, and a custom interceptor.
• Implemented EventBus to facilitate the communication between processes in the Android app.
• Supervised the creation of testing suites developed with Espresso and Mockito.
• Added push notification features with Firebase Cloud Messaging for Android.

ANDROID MOBILE APPLICATION DEVELOPER

Confidential, San Francisco, CA

Responsibilities:

• Delivered across the entire app life cycle concept, design, build, deploy, test, release to appstores.
• Workeddirectly with developers and product managers to conceptualize, build andtest products.
• Built prototypes at tech scoping stage of projects.
• Refined code to includeZXingmulti-format 1D/2D barcode image processing library to scan products to instantly read ratings and reviews.
• Worked on Find in Store feature on the Product Page featureimplementation.
• Developed Testing frameworks usingRobotium,Robolectricandother automated testing tools based on requirements.
• Refinedthe app using latest classes, Fragments, Receivers, Widgets, notifications and best UI external libraries.
• ImplementedPicasso,Volley for smooth networking operations and image loading and caching.
• Simplifiedcommunication between Activities, Fragments, Threads, Services, etc. usinggreenrobotEvent buslibrary.
• Worked onSynchronization of the backend database with the frontend UI, SQLite by implementing RESTful web services and JSONparsing.
• Made appmultithreaded using, Async Task, Thread Pool. Executors,Executors,ParallelProgramming and Handlers.
• AddedACRA library to automaticallypost crashreports to aGoogleDocform.
• Updatedvarious UI components, such as addingViewPagerIndicatorwidgets to existingViewPagerobjects and improving custom progressindicators.
• Implemented GSON library for serialisation anddeserialisationof Json data received from remoteAPIs.
• Integrated Amazon in-app purchases.
• Providedbackward compatibility to the application using support packages, fragments external libs,ActionBarSherlockandActionBarCompact.
• Maintained 80%+ test coverage usingEspresso.

ANDROID DEVELOPER

Confidential, Richfield, MN

Responsibilities:

• Guided decisions on architecture and technical strategy.
• Strong understanding of server-side software, scalability, performance, and reliability.
• Implemented the user interface by using Custom Views, ListView, Relative Layout, Linear Layout and Table Layout.
• Applied fragments to minimize the activity count and simplify the navigation
• Performed extensive application testing with the Robolectric unit test framework.
• Used Espresso & Mockito for testing the UI & App functionalities.
• Communicated with RESTful web services to obtain insurance companies information using Retrofit, OkHTTP and Jackson.
• Generated reachable daily goals and created a delegation task system that allowed developers focus on the development bearing.
• Wrote unit tests for the functionality of the application.
• Used Retrofit and GSON to retrieve information from an internally programmed API and make the conversion between the JSON and POJOs.
• Post Get/Post/Header HTTP asynchronous request to the backend API using Retrofit
• Organized collaboration between onsite and offshore developers.
• Implemented Picasso to download the image from web services.
• Experience in architecting and developing networking and secure applications for Android.
• Implemented several design patterns such as MVC, Singleton, and Observer.
• Collaborated with Software Engineers for the design and development of back-end services.
• Designed and developed restful web services with J2EE technology over JBoss server.
• Replaced the Google Maps API with Google Maps API V2.

Android Developer

Confidential, Newport Beach, CA

Responsibilities:

• Tested the application using J-Unit testing framework.
• Implemented automated testing with Espresso.
• Applied the Dalvik Debug Monitor Server (DDMS) for debugging and testing.
• Assisted with debugging and profiling Android applications.
• Implemented automated testing with Robolectric in Android.
• Implemented automated testing with Robolectric.
• 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.
• Supported the design, development, testing, and implementation of application.
• Involved in post-production support and maintenance processes to fix the bugs.
• Active in branching, pushing, and merging codes with remote GIT repository.
• Handled memory leaks in constructors and threads to speed up the response time.