Senior Android Developer
2017 - 2019TravelBank (via Toptal)- Converted code to MVP(Model-View-Presenter) architecture.
- Added unit tests to existing and new features.
- Created a screen to display hotels pinned in a map with detail cards at the bottom, similar to Google Maps.
- Integrated custom animations using Lottie.
- Applied Material Design principles throughout the app.
Technologies: Mapbox, Mockito, Dagger, RxJava, Java, AndroidAndroid Developer
2017 - 2017Infuse (via Toptal)- Created an app from scratch that updates inventory and orders from the Clover Platform using the Clover-Android SDK.
- Developed an app that manages authorizations and payments using the Clover REST API.
- Implemented an intense code refactoring of a poorly designed and written codebase—improving code readability and maintainability.
- Applied a TDD approach—writing unit tests for each component before coding.
Technologies: Android Studio, Git, Clover, Java, AndroidAndroid Developer
2016 - 2016Moede (via Toptal)- Developed an app from scratch that plays tracks according to a user's location.
- Integrated Google Maps and Geofencing APIs.
- Developed a module that captures audio from a microphone and plays it in real-time.
- Developed a module that plays multiple tracks in sync, each with its own volume.
- Developed a module that syncs data with a Firebase Database and downloads files from Firebase Storage.
Technologies: Geofencing API, Google Maps API, Firebase, Java, AndroidAndroid Developer
2015 - 2016Mesa- Developed a social app with video calls using XMPP and integrated it with a native C++ library.
- Developed an app based on maps and location with a login via Facebook.
- Learned advanced Git commands.
- Extracted images from Photoshop wireframes and adjusted them to be used in apps.
- Maintained daily contact with a remote development team via Slack.
Technologies: Google Maps API, Realm, XMPP, Android Studio, Git, Java, AndroidSoftware Developer Intern
2011 - 2013Itautec- Developed web services using SOAP.
- Developed a web solution using JavaScript, JSF 2, HTML, and CSS.
- Integrated a SQL Server database to a Microsoft Business Intelligence Solution.
- Learned structural and performance differences between Oracle and SQL Server databases.
Technologies: JSF, JavaServer Faces, Oracle Database, Microsoft SQL Server, JavaScriptSoftware Developer Intern
2011 - 2011Suati- Fixed bugs and implemented new features in a large-scale system written in C#.
- Supported adjustments to an Oracle database.
Technologies: Oracle Database, C#
Software Developer in Recife - State of Pernambuco, Brazil
Member since September 30, 2016
Mateus is an experienced Java developer who has been focusing on Android since 2014. He has also developed web projects using Python, Django, and JavaScript. Mateus is a thoughtful, calm person who doesn't rush with solutions but takes the time to think the problem through in order to solve it properly. He communicates extremely well and can clearly explain his ideas and code.
Mateus is now available for hire
Portfolio
- TravelBank (via Toptal)Mapbox, Mockito, Dagger, RxJava, Java, Android
- Infuse (via Toptal)Android Studio, Git, Clover, Java, Android
- Moede (via Toptal)Geofencing API, Google Maps API, Firebase, Java, Android
Experience
- Java 9 years
- Android 5 years
- SQL 5 years
- JavaScript 2 years
- TypeScript 1 year
- Kotlin 1 year
- Node.js 1 year
- MongoDB 1 year
Availability
Part-time
Preferred Environment
TypeScript, Node.js, Git, Android Studio
The most amazing...
...project I've worked on was a social messaging app where users could apply effects to their faces.
Employment
Experience
- Lychee
A photo sharing app integrated with the Google App Engine. From the Android side, the development involved a Facebook login, in-app purchases, a custom camera, image uploading, parallel processing and other features. The server was based on the Google App Engine, using a non-relational database.
- Guess The Note
A game app to guess musical notes. Integrated it to Google Plus, Google Analytics, and Google Play Games Services (social leaderboards and more).
- Sportifile
An app to schedule and manage football games. Some of the technical highlights were: login via Facebook, push notifications via Google Cloud Messaging, and maps based on user location.
- 99Gás
An app that enables users to order gas from their mobile devices. Integrated with push notifications through Google Cloud Messaging.
- DLNA Videoshttps://youtu.be/9T6GGBuOEQo
An app that streams videos stored in a DLNA Server. It also generates previews of those videos using FFmpeg and displays them in a list.
- Realm Is the Best Android Database Solution (Publication)Since the inception of the platform, Android developers have had pretty much only one option for a database: SQLite. Although feature-rich and powerful, it wasn’t quite what Android app developers needed. Realm, a modern, efficient database solution for mobile platforms, turned out to be an amazing replacement for SQLite on Android. In this article, Toptal Software Engineer Mateus Gondim Romão Batista explains why you should use Realm for your next Android application.
Skills
Languages
Java, SQL, TypeScript, C#, Python, JavaScript, KotlinTools
Android Studio, Slack, Git, Clover, Google Cloud MessagingPlatforms
Android, Ubuntu, Mapbox, Firebase, Oracle DatabaseFrameworks
Mockito, JavaServer Faces, JSF, Dagger, Django, Dagger 2Libraries/APIs
Node.js, RxJava 2, Google Maps API, Geofencing API, RxJava, Google Analytics API, Google+ API, Facebook APIStorage
Realm, MongoDB, Microsoft SQL Server, NoSQLOther
Mapbox SDK, XMPP
Education
- Certificates in Programming Mobile Applications for Android Handheld Systems: Part 1, Part 2, & Concurrency2014 - 2015University of Maryland, College Park via Coursera - Online
- Bachelor's Degree in Computer Science2009 - 2015Universidade Federal de Pernambuco - Recife, Brazil
- Studied in an Exchange Program in Computer Science2013 - 2014Queen Mary University of London - London, England
