SUMMARY:

• Advanced Java and Kotlin programming skill.
• Hands - on with RxJava, RxKotlin, RxAndroid, RxBluetooth, and Coroutines.
• Apply MVVM architecture, MVP architecture, MVC architecture, and SOLID design principles.
• Experience in planning, designing, developing, and implementing successful large-scale mobile projects from client requirements to completion.
• Implemented customized HTTP clients to consume a Web Resource with Retrofit, Volley, OkHTTP, and the native HttpURLConnection.
• Experience requirement gathering for Android mobile app projects.
• RXKotlin, RXJava, RXAndroid, and RXBluetooth experience.
• Experience in the use of GIT, GitHub for version control on Android projects.
• Experience in working with Video, Static content, and advertising.
• Experience interacting with RESTful API and data formats like (JSON, XML, etc.) in an Android environment.
• Solid relational DBMS skills using MySQL, PostgreSQL, or other DBMS products.
• Fluent in Android SDK/NDK and device driver development.
• Ability to ask the right questions, provide feedback to stakeholders, break down the tasks, and create plans to achieve intended results.
• Proven working in Agile (iterative) development (XP, SCRUM, etc.) on Android teams.
• Set up proper interactions of the front-end design and implementation with backend servers.
• Extensive experience with source control tools such as CVS, Rational ClearCase, SVN, and Git.
• Experienced getting Android app approval on the Google Play Store.
• Publish release packages and records.
• Use of multiple MBaaS (Mobile Backend as a service) and cloud integration tools like Parse, Firebase, Google Cloud Services, and Amazon Web Services.
• Hands-on with Kotlin Coroutines, LiveData, Android Jetpack, ViewModel, RxJava, Retrofit, Glide, ButterKnife., Databiding, Volley, and more.

TECHNICAL SKILLS:

IDEs: Android Studio, NetBeans, Microsoft Visual Studio, EclipseIncident Report Tracking: Jira, InstaBug, Firebase Crashlytics

Testing Frameworks: Espresso, Mockito, Junit, MonkeyRunner, Robolectric

Multithreading: IntentService, AsyncTask, WorkManager, ThreadPoolExecutor, WorkManager, RxJava. Kotlin Coroutines, Handler, Looper

Android UI: Animations, CustomViews, CompoundViews. ConstraintLayout, BottomNavigationView, ViewPager, Layout Qualifiers, AnimationDrawable, RecycleView

Notifications: Firebase Cloud Messaging, Airship

Version Control Software: SVN, Git, Bitbucket, Visual Source Safe, SourceTree, GitHub, GitLab

Languages: Android SDK, Java, Kotlin, J2EE, JSP, JavaScript

Libraries: RxKotlin/Native Libraries, RxJava, Universal Image Downloader, Picasso, Glide, Volley, ORMLite, SQLCipher, JUnit, NineOldAndroids, Urban Airship, ViewPagerIndicator, Android System Bar Tint library, SecurePs, SlidingUpPanel, Crittercism, comScore, Facebook, LiveRail, LeakCanary, GSON, Mosh, Jackson, Retrofit, OkHttp, SimpleContentProvider, Schematic, GCM, Google Location, Google Maps API, Dagger, Mobile Development, RSA, AES, Retrofit

Methodologies: Agile, Waterfall, RUP

Databases: SQLite, MySQL, SQL Server, Oracle, Room, Firebase, Realtime

Multimedia: Glide, Picasso, ExoPlayer, TextureVideoView

Continuous Integration Tools: Jenkins, CircleCI, Travis

Web Services: RESTful, SOAP, JSON, XML

WORK EXPERIENCE:

Confidential, Long Beach, FL

Senior Android Application Software Developer

Responsibilities:

• Molina members can sign into the app using their Confidential User ID and Password to access our secure features; view health coverage; view your benefits and eligibility; view/download and share ID card; make premium payments; manage your payment profile; save favorite doctors; change PCP; access to other services; and more.
• Configured app to collect identifiers within Google Firebase to create a unique identifier for each application when downloaded.
• Created Custom Views and animations and implemented Android components to specifications (pre-format and stable).
• Integrated ExoPlayer with the app's activity lifecycle to support backgrounding, foregrounding, and playback resumption to view videos.
• Created an algorithm that filters user input when the user is entering their birthdate in registration.
• Migrated JobService to WorkManager API to sync user information, analytics data with RevenueCat SDK.
• Created functional programs to handle adaptive video streams, register event listeners to monitor playback state and show how listeners can be used to measure the quality of playback.
• Programmed in Kotlin and applied a MVVM architecture.
• Used the Google Calendar API to achieve deeper integration with Google Calendar and Firebase push notifications to add medication and appointment reminders.
• Created set of programming interfaces using Reactive Streams library to define the transmission of stream elements regulated through back-pressure and perform serialization/deserialization of the data elements using Google Protocol buffers.
• Integrated Stripe Purchases SDK to unlock access to the same subscription content.
• Resolved defects/bugs during QA testing, pre-production, production, and post-release patches.
• Maintained and improved the CI/CD Jenkins pipeline.
• Performed testing procedures using Espresso and Mockito tools.
• Created documentation and flow diagrams in Confluence.
• Applied Kotlin extension functions to efficiently re-use existing codes and reduce code duplication to its bare minimum.
• Practiced pair programming in support of best-practice Agile development practices.
• Utilized Espresso for the automated UI testing RecyclerView interactions.
• Utilized Mockito with Retrofit for mocking the API call (Mockserver).
• Used JetPack for Android components to improve back-end management.
• Used RecyclerView extensively to display list data from RESTful web services proficiently.
• Used Leak Canary to manage, trace and fix memory leaks issue within the Android app.
• Used APIs such as GET, POST and PUT to update servers and retrieve information for users.
• Handled user interactions such as button clicks and page swipes.
• Assisted with code reviews on every PR to ensure quality code and a stable development process.
• Worked closely with a present Figma design to bring the developed UI/UX design to life through Android Studio.

Confidential, Orlando, FL

Android Software Developer

Responsibilities:

• Programmed Kotlin extensions for commonly used code to reuse it and avoid repeating it everywhere it’s needed, including loading images into ImageViews, requesting permissions, write/read from shared ps, among others.Migrated project to AndroidX to use the newest JetPack libraries.
• Used databinding to reduce code in fragments and LiveData to handle lifecycle data to only update the UI when it’s available.
• Used Crashlytics to track user behavior and obtain mobile analytics.
• Built app on MVVM architecture.
• Integrated Mapbox SDK to implement a better performing maps experience than the old Google Maps implementation.
• Worked with Google Analytics with Tag manager to Firebase analytics.
• Implemented push notifications features with Firebase’s Cloud Messaging Service.
• Provided feedback on the design process for all screens for food ordering and ways to reduce number of taps needed.
• Joined in the planning of food ordering feature and decide on a direction to go regarding how the mobile apps should communicate.
• Implemented new designs using InVision prototype to obtain the assets and optimized them for Android.
• Implemented BrainTree SDK for payment processing.
• Migrated database from DBFlow to Room.

Confidential, Sunnyvale, CA

Android Software Developer

Responsibilities:

• Performed build work on a MVP architecture base.Programmed in Java and Kotlin and began the shift from Java to Kotlin.
• Used RxJava for most of the asynchronous processes.
• Implemented new custom views to replace old ones from the previous version.
• Implemented Flurry and Google for traffic and usage analytics.
• Utilized ExoPlayer with a DASH adaptive bit rate streaming technique to show ads and videos of the locations.
• Wrote code to interact with the RESTful service server, as well as serializing the returned code into POJOs via the GSON library.
• Consumed Restful Web service in JSON strings.
• Used reactive frameworks such as RxAndroid, RxBluetooth, and RxKotlin.
• Worked with testing libraries and frameworks JUnit, Espresso, Mockito, and Robolectric.
• Integrated with some distribution services - HockeyApp/TestFairy.
• Developed in Java programming language using the Eclipse IDE and the Android Development Tool (ADT).
• Made use of implicit and explicit intents to access content and other resources from the web.
• Created the database using SQLite local file and a Firebase implementation.
• Integrated early debug builds with a real-time database built with Firebase.
• Set up new Jenkins tasks for nightly builds and continuous integration.
• Modified the navigation and replaced activities with Fragments.
• Implemented the new Material Design capabilities supported in Android Lollipop.
• Used Retrofit to handle the API consumption with a Jackson built-in converter.

Confidential, Houston, TX

Android Software Developer

Responsibilities:

• Used APIs from different API levels to support backward compatibility.Implemented best practices for Android mobile development with their main components: Activities, Services, Content Providers and Broadcast Receivers.
• Implemented Push Notifications to notify users when there is a new price update.
• Implemented newer features in Kotlin and migrated older features coded in Java to Kotlin.
• Ensured backward compatibility by using Android support libraries.
• Applied and configured Geo-Fencing capabilities that were built-in with the Google APIs.
• Configured multiple analytic tools to get valuable information on a post-install state: Crashlytics, Mixpanel.
• Persisted non-sensitive data with Realm database and ensured that the database was using encryption algorithms when persisting user information.
• Secured the database using SQLCipher and Secure Ps.
• Added Flurry for user behavior tracking and quality control over crashes.
• Used Android Studio as IDE.
• Created unit, integration and stress test cases with JUnit, Espresso, and Monkeyrunner.
• Configured the continuous integration process with a Jenkins instance hosted on a private server.
• Utilized Android and third-party frameworks to use the multithreading capabilities of the physical devices: AsyncTasks, IntentServices, Handlers, Threads, RXJava instances.

Confidential, MountainView, CA

Android Developer

Responsibilities:

• Implemented Dagger to address many of the development and performance issues.Managed quality build process using Jenkins continuous integration, with a Git repository on a private Git server. Git was managed using BitBucket on the existing Android app and we migrated the process to SourceTree.
• Created and developed unit testing, instrumentation testing and automation testing for each new feature implemented using Junit, Mockito, Roboelectric, Powermock, Espresso, Calabash for Android.
• Used Implicit and Explicit Intents.
• Developed Custom Views, Compound Views, and various layouts to construct the complex but user-friendly user interface.
• Worked on Starva Bluetooth BLE SDK to design module to pair with Bluetooth devices and transmit large bytes of attributes.
• Designed the UI layout with Balsamiq Mockups wireframe tool for the apps look and feel.
• Ensured display and on-screen rotation worked well on all devices and screen, ensuring integrity with the onSaveInstanceState and onRestoreInstanceState methods.
• Used GSON library to deserialize JSON information.
• Handled Fragment data retention to ensure data integrity in Android on-screen rotation with the onSaveInstanceState and onRestoreInstanceState methods.
• Engaged with cross-functional teams to define new product requirements, features, and functionality in the app.