SUMMARY:

Energetic and highly motivated Android Senior Developer with 6+ years of experience building rich native Android application. Expertise working as a stand - alone developer. Hands-on experience developing stable, reliable and backward compatible Android mobile applications. Highly experienced in implementing rich applications and state-of-the-art practices on native Android SDK.

EXPERIENCE:

Confidential, New York, NY

Senior Android Developer

Responsibilities:

• Proposed and Productively set an asynchronous stand up meetings for the offshore team.
• Liaised as a Point of Contact for offshore team and helped them to resolve and remove any blockers and provide them enough intel from testers and designers.
• Refactored several Asynctask and Bus event third party tool with Coroutines and RxAndroid.
• Contributed with translation to Spanish and Japanese version in the app using translations editor.
• Created qualifiers to modify layout definition according to locale of the device.
• Implemented crash report system, detecting common exceptions inside of the app and create a on the flight email reporting when an exception occurs.
• Collaborated with federated authentication system using the most popular app in the market like Facebook and Google Apis.
• Connected with Urban Airship to define push notifications when a new channel or PPV event.
• Customized Exoplayer and refactored from previous VideoView custom implementation.
• Refactored background operations in the form of foreground services and define custom schedules with Workmanager.
• Enforced the implementation of MVVM design pattern along with databinding and ViewModel architecture components.
• Refactored LiveData observable pattern to exploit the coroutines suspended operations.
• Created match reminder inside of the application using coroutines with foreground services.
• Created notify your friends feature using a default content provider and discover accounts registered in base of numbers and emails.
• Implemented customizable permissions and in-device discovery to increase the privacy of sensitive data from the user.
• Defined an incremental strategy to require sensitive runtime permissions like using default content providers and WiFi connection with DVR system.
• Worked in a TDD and pair programming approach, rotating roles between sprint cycles and playing part of Approval Team to enforce quality code.
• Defining BLE connection between DVR system and device user depending on the package acquired by the user.
• Defined several flavors on app release according to business profitable grades using the same code and limit features depending on the package acquired by the user.
• 5 applications published in Google Play Store.
• A wide understanding of trending web development languages like JavaScript, jQuery, Ruby on Rails, React.
• Successfully translated applications to native Spanish and Japanese language.
• Guided decisions on architecture and technical strategy in mobile app and Android development.
• Passionate implementing and exploring top and experimental technologies in the mobile environment.

Confidential, Irving, Texas

Senior Android Developer

Responsibilities:

• Worked closely with a TDD environment implementing several unit testing and instrumented test.
• Defined utility classes for easy to test functionality like account details, account authentication and several validations steps.
• Created static implementation to overcome limitation on mocking libraries, defined spy objects for better testing implementation.
• Refactored several class implementations for easing the testability across the application.
• Analyzed app components for implementation of dependency inversion libraries.
• Defined components, modules and scopes for dependency library in the entire application.
• Increased the testability of the app with the use of Dagger2 library.
• Defined reactive subjects to create producers inside of implementation of observable objects.
• Utilized RxJava and MVVM architectural pattern, with various design patterns such as Abstract Factory, Builder, Observer, and Singleton.
• Used Android Device Monitor for monitoring CPU load, heap size, and memory usage.
• Efficient and clean code integration and backup using Jenkins for continuous integration with Git for version control repository.
• Collaborated with quality assurance testers to make incremental improvements.
• Developed update patches, modules and components to mitigate security risks using AES encryption and Keystore.
• Worked along with UI/UX design team to implement new look and feel in the application.
• Used design tools like Zeplin and Sketch for easy to follow new look and feel for the visual upgrade across the application.
• Defined animations, transitions and motions layouts accordingly to UI requirements.
• Debugged several endpoints closely with backend developers for fast integration with several custom SDK for fetching user data.
• Defined security strategy with certificate pinning for preventing attacks of man in the middle.
• Integrated Paypal sdk for flexibility for non-Citi accounts service.
• Used RelInker library to call native C/C++ functions.
• Created different version product flavours to support different level accounts customization.
• Implemented Material Design components along with predictable animations like Swipe to delete and long press animations, making more user-friendly the application.
• Created future and suspended functions for making more responsible and efficient the application.
• Elaborated proper data structures for easy implementation MPAndroidChart for detailed portfolio visibility.
• Created CustomViews with Custom attributes to handle visibility of the login feature to reveal the password with transformation method.
• Created custom PDF viewer for several reports from portfolio accounts with PDFview and Imageview implementation.
• Established AES encryption for linked accounts feature.
• Defined token lifetime with proper strategy for continuously ask renewing account authentication.
• Implemented Barcode Api and removing Zxing library implementation.

Confidential, Portland, Oregon

Senior/Lead Android Developer

Responsibilities:

• Defined language translation for all the application.
• Created qualifiers on several layouts to implement master detail flow.
• Defined specific resource folders with the current language identifier and monitoring all the proper translation to Spanish.
• Removed hard coded string references inside of xml layouts.
• Defined placeholder on English words references and avoid translation reference for the Spanish version of the app.
• Helped to define pixel perfect layouts along with Material design implementation components, like Tablayouts, Botton Navigation, Card View and Recyclerview.
• Implemented AnyChart third party library on "Measure Yourself" feature and tracking progress updates with real time databases.
• Contributed on the implementation for Firebase library.
• Refactored and removed GCM implementation on push notification base options in the entire application.
• Created multiple Notification channels to support user preferences on groups notifications.
• Defined Workmanager along with Job Schedulers to create schedule-base notifications for personal goals inside of the app.
• Refactored users personal account to identify goals and track performance history.
• Refactored Asynctask and Volley libraries with Retrofit and RX implementation calls.
• Removed several callbacks with Rx Java and Rx Android implementation.
• Fully implemented MVVM architecture design pattern from previous MVP implementation.
• Tracked bugs fixes with Crashlytics tools in Firebase and have a constant bugs and crash reduction in the application.
• Implemented Room DB and refactored previous SqlLite Open helper implementation.
• Mentored and documented new Architecture Components from Android Jetpack lifecycle aware components.
• Reduced app size with the implementation of ViewModel components and removing old presenter-view implementation.
• Defined Prove of Concept of TDD methodology, created documentation and mentored lead developers from other teams to follow the Red-Green-Refactor strategy.
• Explored the Kotlin language for coming features in the application.
• Designed and developed functionality between user interactions and delegated back to the server using RESTful web services and JSON parsing.

Confidential, Dallas, TX

Senior Android Developer

Responsibilities:

• Created a proper documentation on existing endpoints and Utility Classes to ease the on-boarding process.
• Elaborated a test for possible candidates to join to the IT team.
• Used management tools like jaCoco and crucible for approving Pull Request on a git fashion version control system.
• Used Jackson library for parsing JSON files coming from web services.
• Used Leak Canary to manage, trace and fix memory leaks issue within the Android app.
• Established a standard for PR for the entire AN team request following best practices in the market like SOLID principles.
• Refactored multiple callbacks in the form of Asynctask with RX extensions.
• Implemented RX Java and RX Android and facilitated the learning curve to this technologies for Jr developers.
• Debugged trip cost closely with backend teams and refactored endpoints to eliminate recursive and duplicated trips on users accounts.
• Implemented Android KeyStore to consolidate security in app.
• Preventing attacks of man-in-the-middle with storing a local public certificate used to identify interaction between client and server.
• Increased security in local Sqlite databases with SQLCipher encryption and decryption.
• Defined deep links with account details and third party implementation.
• Debugged interaction with third party application like Uber at the moment of requesting ride inside of the application.
• Debugged runtime permissions for fine location in LG devices.
• Configured Urban Airship third party service with push notifications in app to deliver friendly message about trip details.
• Schedule trip notifications with Alert Manager and Job Schedulers to notify the user about incoming trips.
• Refactored UI layouts and implemented Constraint Layouts with Coordinator layouts along with chains and guidelines.
• Refactored timer in app for a shorter time at the moment of activating new tickets from the user.
• Debugged several errors on barcode implementation.

Confidential, San Francisco, CA

Android Developer

Responsibilities:

• Implemented BLE pairing with customize headset for special video audio material.
• Created out of the box Exoplayer customization and branding to follow the principles for the company.
• Implemented media sessions and debugging audio issues on LG devices when playing audio files material.
• Creating settings support in the form of Preference Fragment.
• Designed and developed a new login system to control multiple users into the same device.
• Configured SQLite database to control user access and hold progress in course material.
• Participate in several meetings to define the look and feel with the new Layout implementation.
• Implemented Tab layouts, to visualize multi-layouts and increase the attraction from the students.
• Handled the lifecycle of the fragments and creating headless fragment strategy to fast load course data.
• Designed and collaborated with UI/UX team for the new branding in the application using new UI components from Material Design.
• Customized ripple effect on the button for the look and feel design.
• Created navigation and refactoring static fragments with Fragment Transaction and handling the backstack for a better experience.
• Defined multiple View Holders for in app communication.
• Refactored fragments with RecyclerViews so can handle different types of incoming and outgoing messages.
• Added a DrawerLayout to handle external and constant menu items related to the app's current Activity and extra features.
• Maintain 100% code coverage by including JUNIT test cases for written code
• Simplified the usage of threading by implementing RxJava for most of our asynchronous processes.

Confidential, San Francisco, CA

Jr Android Developer

Responsibilities:

• Joined an ongoing app as a Jr Android developer. Being part of a 5 AN developers, 5 iOS developers, 4 testers and 5 backend developers.
• Implemented SQLite implementation and upgrades strategies to user configuration security (PIN) as part of the Create New Document feature.
• Contributed with design and implementation of Accounts tables and User table following the normalization best practices.
• Debugged along with backend developers’ new endpoints to generate paths from file server and in corporate the linking process of documents inside of the app.
• Formalized links to avoid meta problems configurations.
• Ensure application is backwards compatible and provides a quality experience on all common OS/device combinations
• Configured long running services to trigger time out sessions for users.
• Implemented persistence of data before a retry session is in place.
• Enforced permission access to saving documents internally and externally.
• Created background operations in the form of Asynctask operations to perform users’ details in documents.
• Use SharedPreference to contain user customization preferences, like current location, saving data transaction for the user.
• Prove of Concept for Content providers with a third party application to visualize documents outside of the application.
• Completed the implementation for federated login inside of the app.
• Established the use of instance handlers for Java threading separated from the user's interface thread.
• Created cloud connection with REST client calls, GSON and OkHTTP.
• Implemented secure data encryption using an SQLCipher instance.
• Collaborated with UI/UX designers to develop a user-friendly application.
• Decoupling our Main UI thread with background tasks and download music files using DownloadManager.

Confidential, Miami, Fl

Web Developer/Android Jr Developer

Responsibilities:

• Designed, developed, and update responsive Websites for small businesses.
• Provided guidelines for branding strategy for small businesses.
• Created a marketing scoped strategy for companies to initialize and increase the digital marketing on their business.
• Running meetings with entrepreneurs to consolidate ideas and landing on real opportunities that reflect on profitable solutions.
• Created portfolio solutions including branding, web presence and mobile presence.
• Utilized top-edge technology for digital marketing with JavaScript, jQuery, Ruby on Rails, React.
• Refactored React implementation to Android native components like TextViews, ListViews, Spinners.
• Refactored ViewManager with Custom Views that extend functionality and keeps the branding look and feel for the client.
• Implemented support for tablets on Jelly Bean android version.
• Right to left implementation for our clients application on Asia market, improved the readability and friendly ease to use application.
• Implemented language support on applications, specially focus on Japanese language.
• Use of GIT for source control management and continuous integration with Jenkins.
• Proven abilities to work closely and effectively with engineering and non-engineering teams.
• Used Android Studio, Java, AsyncTasks, Google Maps, RESTful, JSON, SQLite, Servlets, Tomcat, MySQL, SVN, 9Patch.