SUMMARY

• A result - oriented professional offering over 12 years of experience building, integrating, testing, and supporting Android applications for mobile and tablet devices on the Android platform.
• 6 Apps published on play store; 1 app in Alpha test phase; 1 app built for internal corporate use.
• Skilled in RxJava for multithreading and consumption of RESTful Web.
• Ability to debug, diagnose performance bottlenecks and fix complex issues in Android.
• Build mobile applications that utilize web services (REST, HTTP-based, XML, SOAP, JSON or other services).
• Contribution Android teams with mentoring, development, and extensive code reviews.
• Able to develop consistent, reliable code that is efficient and clean.
• Collaborates well with cross-functional teams, finding ways to add value for other teams, and contribute to overall quality and success of application.
• Proactive self-learner skilled in adapting to new technologies, such as Smart Watches, Chromecast, and Smart TV devices.
• Proficient in using best UI/UX best practices implementing fragments, diverse layouts, animations, Material Design, Compound Views, and Custom Views.
• Designed various applications using optimal architectural design patterns (Model View Controller, Model View Presenter, Model View View Model).
• Experienced in integrating Android mobile apps with web services using Retrofit, Volley, Async Task, OkHTTP, JSON, GSON, and REST.
• Extensive experience with source control code repositories such as Git, GitHub, and GitLab using tools like SourceTree as well as the command line.
• Worked with continuous integration servers (Jenkins, Hudson, Travis) and implemented simultaneous testing on various devices.
• Experience with continuous integration tools like Jenkins or Travis CI and automated testing frame Experience in working with Android SMS Manager, Location Manager, Google Maps, APIs, and Ajax.
• Experience using 3rd party libraries for image loading, notifications, and web services.
• Experience with embedded local storage solutions such as SQLite, Room DB, Shared Preferences, Encrypted Shared Preferences, internal storage, external storage and cloud storage with Firebase.

TECHNICAL SKILLS

Programming Languages & Tools: C, C++, C#, Java, JavaScript, Kotlin, CSS, XML, Linux, J2EE, Spring, JSON

Database: SQL, Oracle SQL, MySQL, SQLite, Mongo, Room DB, Firebase

Web Technologies: HTML, CSS, Node JS, ExpressJS, JavaScript, Ruby

Android Libraries: EventBus, Butterknife Retrofit, Room DB, LiveData, RxJava, Glide, Picasso, TextureView Video Player, RxAndroidBle, RxAndroid, EventBus, HttpLoggingInterceptor, Dagger2, Dagger1

Version Control: GitHub, Git, Source Tree, BitBucket

Architecture & Design Patterns: MVC, MVP, MVVM, Singleton, Builder, Factory, Facade, Dependency Injection

Debugging & Testing: Jenkins, Test Fairy, Robotium, Leak Canary, Mockito, Espresso, Firebase Hudson CI, Travis CI, JUnit, Monkey Runner, RoboElectric

IDEs: JCreator, Android Studio, NetBeans, Eclipse, Visual Studio, Gradle

OS: Windows XP/7/8/10, Mac OS

UI/UX: Android RecyclerView, Android ListView, GridView, CardView, ConstraintLayout, GuideLines, BottomNavigationView, LinearLayout, Vector Drawables, Animations, AnimationUtil

Scheduling: WorkManager, JobScheduler, Evernote Android Job, Handler, AlarmManager, Pending Intents

Issue Tracking: Jira, InstaBug

PROFESSIONAL EXPERIENCE

Sr. Android Mobile Developer

Confidential, Columbus, OH

Responsibilities:

• Leading the team and coordinated on object-oriented programming with the Android framework for the app
• Worked on various files in both Java and Kotlin and refactored some legacy Java code into Kotlin.
• Developed modules in Kotlin using MVVM app architecture for ease of maintainability and extensibility, as well as improved quality testing.
• Using the Android Studio toolkit and identify and fixing existing anti-patterns in the code base.
• Created Kotlin singleton objects to abstract consumption of data model layers into Repository layers.
• Created custom and compound views to preserve the general look and feel specified by the client.
• Began transitioning modules of the app from MVP architecture to MVVM, and applied SOLID principles throughout the Android mobile app.
• Fixed null pointer exception crashes.
• Terms and Conditions feature to sign in.
• Metrics to failed log in to Google Firebase and Google Scribe.
• Metrics to a Successful Login to Google Firebase and Google Scribe.
• Feature to show the user when the battery percentage is low.
• Created Recycler Views and their respective adapters to display all list information per UI/UX design requirements.
• Handled web services calls for information and content data retrieval with Retrofit.
• Assisted in new employee on boarding.
• Peer Reviewed coding through PRs.
• Updated the UI of the application for ease of use.
• Assisted in spring grooming where I assigned points to tickets.
• Worked on payment module to create a payment and process money transfer using OAuth2 tokens and multiple payment APIs.
• Worked on unit tests extensively following TDD best practices, using JUnit, Mockito and Espresso for UI testing in the development process.
• Used Intents and Intent Filters to initiate activities and pass information between Activities and Fragments.
• Implemented Location Services for geolocation and geofencing.
• Applied encryption techniques to encrypt local Room database.
• Documented how the application is used when in offline mode as well as how it behaves when the user suddenly loses access to the internet.
• Led presentations for tech demos and engaged in one-on-ones with peer developers.
• Helped with German translation of the application.
• Assisted in the launch of an EU version of the application (Germany).

Sr. Android Developer

Confidential

Responsibilities:

• Mentored Junior developers and assist in reading code base, perform code reviews etc.
• Worked in an AGILE team and also play SCRUM Master (daily standups, weekly planning meetings).
• Led discussions and contributing to technical decisions, striving for clean architecture.
• Designed App Architecture, select necessary tools, frameworks and patterns with Android JetPack Architectural components (LiveData, ViewModel, Room)
• Integrated Retrofit for network call handling.
• Created analytic BLE beacons for tracking information.
• Pulled server data using REST API, using Retrofit, okhttp and RxJava(RxAndroid) networking libraries.
• Used Kotlin to update the code base to bring it more inline with the rest of the various modules.
• Created functional test to ensure that new code is working properly and as intended.
• Collaborated with external clients to include Branch SDK for mobile conversion, retention, and engagement through deep linking and user routing.
• Use Mockito API for Capturing the arguments, wrapping java objects with spy and verify the calls on the mock objects.
• Refactored code base to implement dependency injection strategy using Dagger library.
• Created several components and factory interfaces to isolate app components into modular fashion.
• Implemented background services to keep track of BLE connectivity and resolve issues with Android Oreo background limitations.
• Coded schedulable jobs through WorkManager API.
• Performed bug fixes on existing code and took part in code reviews.
• Participated in sprint retrospective, where I gave suggestions on how to improve the work flow.
• Defined migrations strategy with the implementation of Room database to remove previous SqliteOpen helper implementation.

Sr. Android Developer

Confidential, San Francisco CA

Responsibilities:

• Collaborated with the server-side developers to design APIs specifically for the Android application.
• Work in a multi-disciplinary team in London and alongside dev peers throughout US within an agile team (daily standups, weekly planning meetings).
• Lead discussions and contributing to technical decisions, striving for clean architecture.
• Designed App Architecture, select necessary tools, frameworks and patterns with Android JetPack Architectural components (LiveData, ViewModel, Room)
• Worked with Android Beacon Library API to request ranging update from one or more beacons at a frequency of approximately 1Hz.
• Exported data to CSV or PDF using Android PdfViewer and FastCRV external library.
• Saved and backup a GPS "mileage receipt" for each trip using FireBase Cloud Backend and Realtime database services.
• Upload paper receipts of meals, supplies, and other expenses with background threads using JobSchedulers and JobIntentServices to MongoDB backend.
• Consumed Milage API, Accounts details API using Retrofit, okhttp and RxJava(RxAndroid) networking libraries.
• Migrate and develop new products features using Kotlin programming language features and Android KTX.
• Upgraded payments systems within the app by incorporating Stripe SDK to accept and manage card payments.
• Collaborated with external clients to include Branch SDK for mobile conversion, retention, and engagement through deep linking and user routing.
• Use Mockito API for Capturing the arguments, wrapping java objects with spy and verify the calls on the mock objects.
• Refactored code base to implement dependency injection strategy using Dagger library.
• Created several components and factory interfaces to isolate app components into modular fashion.
• Implemented background services to keep track of BLE connectivity and resolve issues with Android Oreo background limitations.
• Coded schedulable jobs through WorkManager Api to have routines for backup information from Mileage Website entries.
• Contributed with proper documentation and KT documents to ease onboarding process for new developers.
• Defined migrations strategy with the implementation of Room database to remove previous SqliteOpen helper implementation.

Sr. Android Developer

Confidential, Atlanta, GA

Responsibilities:

• Ensured new and existing applications met Mercedes requirements.
• Code reviewed peer’s development.
• Worked with Designers and Product Managers to agree product definitions.
• Coded, debugged and united test systems per requirements and technical design.
• Coded in existing MVVM architecture using Data Binding Library to bind UI components in the layouts to data sources.
• Created Repository layer and abstracted monolithic ViewModel into view-case scenario.
• Performed Offline database synchronization with Realm Database to display the latest news from Mercedes-Benz, View manuals and how-to videos.
• Scheduled payments with Mercedes-Benz Financial Services using Google Pay API to request any credit or debit card stored in customer's Google Account.
• Posted and update account and contact information with Backend API using Retrofit Form-Encoding and perform secure network traffic transmission.
• Worked with Android NDK and use ReLinker library to load native libraries asynchronously.
• Upgraded Splunk MINT SDK to collect crash, performance and usage data for your app and send it to our Cloud servers.
• Worked alongside senior developer to use AltBeacon library to interact and get notifications when one or more beacons appear or disappear.
• Addressed many of the development and performance issues that plagued reflection-based solutions using Dagger2 injection library.
• Communicated with Amazon Web Services (AWS) for secure cloud services platform, database storage and content delivery.

Android Specialist

Confidential, San Francisco, CA

Responsibilities:

• Worked with other developers to write software based on backlog items.
• Worked with testers to ensure they are engaged and ready to test the software at the right time in the development cycle.
• Supported, refactored and enhanced existing production systems.
• Organized business logic, workflows, processes, rules in Domain layer and communicated with data/ presentation layer in MVP architecture.
• Integrated OAuth2 authentication with Identity Server.
• Enhanced the module that communicates with the Java WebServices with Volley library.
• Collected customer data and send it to your tools for mobile analytics, marketing automation, and raw data access with SQL using Segment SDK.
• Replaced Samsung Pay with card.io library for credit card scanning and BrainTree SDK.
• Used Git flow for code integration, Jenkins for continuous integration and JIRA for bug tracking.
• Worked on Schedule Deliveries’ and Real Time tracking’ acceptance criteria’s in TDD manner.
• Wrote automated UI test cases using Espresso and functional integration testing using Robolectric API.
• Performed additional beta testing using Google Cloud testing mechanism.
• Encrypted card details in Android Keystore system to store cryptographic keys in a container to make it more difficult to extract from the device.

Native Android Developer

Confidential, Dublin, OH

Responsibilities:

• Helped define development environment and communicate the best development practices within the organization (i.e., code reviews, testing, etc.).
• Worked closely with other teams (Stakeholders, Product and UX) to drive product development in an iterative and agile way.
• Participated in the relevant scrum events; planning and estimation, daily scrums, sprint reviews, and retrospectives.
• Defined business rules for data manipulation and then processed the user's data with the help of Model and passed the results back to the View in MVC architecture.
• Created and updated patient's appointments, visit history, and medical records locally using Realm database library.
• Worked with Calendar API to send SMS and/or email appointment reminder.
• Automated sync to secure AWS cloud at a specific time (Save data to cloud automatically) using IntentServices and AlarmManager API.
• Created automatic routines scheduling network requests and transparent disk and memory response caching with standard HTTP with Volley library.
• Pair-programmed to work on Google CData Client library for HTTP transport, error handling, authentication, JSON parsing, media download/upload, and batching.
• Incorporated VuDroid library to enable PDF functionality within the app.
• Created Custom view circular ImageView to display profile images, material Dialogs, graphs, tabs and custom progress bars.
• Worked with Behavior Driven Development frameworks such as Cucumber.

JR. Android Programmer

Confidential, Sterling, VA

Responsibilities:

• Collaborated as a member of the team undertaking the shared commitment towards completion of the team's sprint goals.
• Accepted joint responsible with the team for converting the Product backlog into 'Done' potentially releasable increments.
• Implemented disk-based LRU cache which specifically targets Android compatibility for accessing filesystem.
• Optimized UI for different android versions and devices using Fragments.
• Parsed JSON data using HTTP client (GET, POST, DELETE, PUT) Volley library and displayed in a listview following view holder pattern to display latest news and articles.
• Upgraded Twitter SDK and Facebook SDK to share articles and videos.
• Performed XML DOM parsing to weather information according to current location of the user.
• Configured and send Notifications around breaking news and important emails using GCM with UrbanAirShip client.
• Implemented data persistence using SQLite for caching data in the app device.

Associate Software/Android Engineer

Confidential, Columbus, OH

Responsibilities:

• Under constant supervision, collaborated with multiple teams under Confidential development team.
• Participated in several Code-Labs and Courses covering technical discussions and increase code quality.
• Successfully assisted multiple teams to build and deploy to both test and live servers.
• Utilized version control software such as GitHub and Jenkins to deploy and monitor software releases.
• Contributed to created multiple Jenkin pipelines to speed up build process.
• Created small fixes to help software compile and deploy to large enterprise servers.
• Effectively tested new software for bugs and defects for the JP Morgan consumer banking branch.
• Including Microsoft Excel and HP Quality Center to both manage defects as well as creating test scripts.
• Created several test cases using tools like Cucumber, Mockito and jUnit.
• Worked closely with product owners and business analyst to ensure that any new functionality both worked but also did not break any existing functionality.
• Collaborated with QA engineers to elaborate uses cases and implement pyramid test.
• Applied happy path along with black box white box strategy to ensure code quality in multiple assignations.
• Provided support to various software teams in migrating software access to a central access team.