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Eduard Carreras
Verified Expert in Engineering
Android Developer
Barcelona, Spain
Toptal member since January 27, 2017
Bio
Eduard has spent 15 years working on the IT system behind the distribution of the results of the Olympic Games. His experience ranges from project management to development in different languages. He's a passionate developer of Android applications since 2011—creating and publishing apps under the brand Poquesoft with more than 500,000 downloads in the Google Play Store.
Portfolio
Spanish Publc Unemployment Service
Flutter, Moodle, Learning, Cross-platform
ClubControl
Flutter, Mobile Apps, Firebase, IT Project Management, Mobile Applications...
Poquesoft
REST APIs, Mobile, Dart, Firebase, Git, Flutter, Android, Java...
Experience
- Mobile App Development - 12 years
- App Development - 12 years
- Mobile Applications - 12 years
- Mobile Apps - 12 years
- Android Development - 9 years
- Firebase - 6 years
- Git - 6 years
- Flutter - 5 years
Preferred Environment
Git, Gradle, Android Studio, Native Mobile Apps, Flutter
The most amazing...
...professional experience I’ve had was being part of, for more than 15 years, the Olympic Games—from Salt Lake 2002 to Rio 2016.
Work Experience
Flutter Instructor
2022 - PRESENT
Spanish Publc Unemployment Service
- Designed and taught a course named "Introduction to Flutter Development."
- Guided and supervised students in the learning process.
- Oversaw the projects built by the students to ensure they could complete them in the required time with the expected quality.
Technologies: Flutter, Moodle, Learning, Cross-platform
CTO
2020 - PRESENT
ClubControl
- Served as a CTO and partner of a startup that helps football clubs to organize and plan their season.
- Contributed to the project management and development of the ClubControl app for Android and iOS using Flutter.
- Helped to build a mobile app based on Flutter using Firebase as back end.
Technologies: Flutter, Mobile Apps, Firebase, IT Project Management, Mobile Applications, Mobile App Development, Mobile App UI, App Store, Google Play Store, Native Mobile Apps, Mobile Development, iOS, Firebase Analytics, Google Cloud Messaging, JSON, Firebase Cloud Messaging (FCM), Crashlytics, Android Emulators, App Development, Cross-platform App Development, Cross-platform
Mobile Developer
2011 - PRESENT
Poquesoft
- Developed and published several Android and iOS applications under Poquesoft which is my branding for personal projects.
- Built an app for the management of sports tournaments. It has been used by more than 3 million tournaments and has more than 500,000 downloads in Google Play Store. The last version of this app is built with Flutter and published for Android and iOS.
- Created Quiniela para Android, an app to follow Spanish Football Lotto, Quiniela, and also many football competitions. It has more than 500,000 downloads and a rating of 4.2/5 with more than 7,000 reviews in the Google Play Store.
Technologies: REST APIs, Mobile, Dart, Firebase, Git, Flutter, Android, Java, Google Play Store, Android Development, Mobile Applications, Mobile Ads, Mobile App Development, Google AdMob, Mobile Apps, Native Mobile Apps, Ubuntu, Mobile Development, iOS, MoPub, Unix Shell Scripting, Firebase Analytics, Firebase Android SDK, Google Cloud Messaging, Firebase Authentication, Firebase Realtime Database, JSON, Firebase Cloud Messaging (FCM), Crashlytics, Android Emulators, App Development, Xcode, PHP, Cross-platform App Development, Cross-platform
Flutter Consultant
2022 - 2023
Newsfy
- Helped the existing development team build the Newsfy app in Flutter.
- Created pixel-perfect Flutter screens from the Figma designs provided.
- Provided Flutter consultancy to assist with best practices on Flutter development.
Technologies: Flutter, Firebase, Cross-platform App Development, Cross-platform
Flutter Developer
2020 - 2022
Public Safety Mobile App
- Developed a public safety mobile app to help emergency personnel deal with high-risk situations safely. The app was built in Flutter with extensive use of Google Maps for both Android and iOS versions.
- Worked on publishing the apps on both Google Play and Apple App Store, implementing Fastlane to improve building and publishing.
- Implemented various features, including secure authentication requirements and a chat functionality.
Technologies: Flutter, Google Maps, Mobile Development, iOS, Mobile GPS, Firebase Cloud Functions, Unix Shell Scripting, Google Cloud Messaging, JSON, Firebase Cloud Messaging (FCM), Trello, Crashlytics, Android Emulators, App Development, Xcode, Cross-platform App Development, Cross-platform
Android Developer
2017 - 2019
OpenTrends
- Worked as a freelance developer—collaborated with OpenTrends on the project ABSIS3-ADAM, the Android Development Framework used as a base to develop apps for the Spanish bank CaixaBank.
- Supported the architecture of Android libraries to cover the everyday needs of CaixaBank apps as REST calls, security (encryption, secure communications), or remote configurations.
- Worked in a team of four Android developers and created and distributed the base modules so that other suppliers only had to focus on creating new features. Our mission was to make the work of other teams easier.
- Supported CaixaBank's suite of applications, including CaixaBank (with more than 5 million downloads in Google Play), ImaginBank, and CaixaBank Pay.
- Worked with clean architecture techniques in a development environment focused on continuous integration and agile methodologies.
Technologies: REST APIs, Mobile, Git, Android, Java, Android Development, Jenkins, Android SDK, Mobile Applications, Mobile App Development, Mobile Apps, Native Mobile Apps, Mobile Development, JSON, Android Emulators, App Development
Android Developer
2016 - 2018
Bebop Studio
- Worked as a freelance developer and collaborated with Bebop Studio on an app for the Spanish telecom MasVoz.
- Improved the stability and compatibility of the BizPhone VoIP Android app.
- Implemented PJSIP libraries on the BizPhone app, using Android NDK.
Technologies: REST APIs, Mobile, Android, Google Play Store, Android Development, Mobile Applications, Mobile App Development, Mobile Apps, Native Mobile Apps, Mobile Development, Android Emulators, App Development, Android NDK
Application Product Manager, Olympic Project
2006 - 2015
Atos
- Managed several applications for the distribution of the results to the media for the Olympic Games in Beijing 2008, Vancouver 2010, London 2012, Sochi 2014, and Rio 2016.
- Oversaw and had full responsibility for the whole software life-cycle—ensuring that the applications were developed according to customer requirements in terms of functionality, availability, and service levels.
- Defined the apps' functionality to meet customer expectations.
- Supported architecture documentation, technical specifications, test strategy, and test scenarios.
- Coordinated with the development team the content of each delivery and with the testing team the different testing phases of managed applications.
- Ensured that the delivered applications are in accordance with its specifications and all the deliverables are produced according to the defined quality standards and service levels.
- Managed the defect management and change management process evaluation which entailed—getting approval and tracking the delivery statuses of application changes and defects.
- Provided support for the integration team in the host city and ensured that their needs are met.
- Supported on-site the operation of the Olympic Games in the host cities, starting two months before the games.
Technologies: REST APIs, Mobile, Java, Product Management, Operations, Functional Design, Operations Management, Native Mobile Apps
PRD/RDF Application Manager, Torino 2006 Olympic Project
2005 - 2006
Atos Italia
- Managed, tested, and successfully deployed a print distribution system (PRD) and results from a data feed system (RDF) for the Torino 2006 Olympic Games in a position based in Torino, Italy.
- Obtained user acceptance certification from the World News Press Agencies for RDF and Torino 2006 Organizing committee for PRD.
- Supported the PRD and RDF during the Olympic test events, multi-sport tests, technical rehearsals, disaster recovery tests, and homologation tests.
- Supported the operation of both apps during the games. All printed reports were distributed on time across multiple Olympic venues, and all RDF messages were distributed to the world news press agencies within the service-level agreement.
Technologies: Java, Operations Management, Product Management, Operations, Functional Design, IT Operations Management (ITOM), IT, Test Protocol Design, High Availability Disaster Recovery (HADR), Native Mobile Apps
Java Software Developer, Olympic Project
2000 - 2005
Atos
- Developed several applications for the results distribution to the media for the Olympic Games in Salt Lake 2002, Athens 2004, and the FIFA World Cup Germany 2006; using C++, Java, and JavaScript.
- Supported onsite the operation of PRD and RDF applications during the Salt Lake 2002 Olympic Games (January/February 2002).
- Led a three-person team for the operation of PRD and RDF applications on Athens 2004 Olympic Games. We responsible for the distribution of printed reports to Olympic Venues and for the distribution results data feed to the World News Press Agencies.
Technologies: Java, C++, Native Mobile Apps
Experience
My Tournaments App
https://apps.apple.com/us/app/my-tournaments/id1482633666I built this app for the creation and management of sports tournaments. It has more than 500,000 downloads in the Google Play Store and has already been used to create more than 3 million tournaments.
Initially created as a Native Android app, it was rebuilt from scratch with Flutter, also creating the iOS version.
Initially created as a Native Android app, it was rebuilt from scratch with Flutter, also creating the iOS version.
Public Safety Mobile App
A public safety mobile app to help emergency personnel deal with high-risk situations safely. The development of the mobile app was completely done in Flutter with extensive use of Google Maps for both the Android and iOS versions.
Role: Flutter Developer
Role: Flutter Developer
Quiniela for Android
This personal project revolved around an application to follow the Spanish football lotto, Quiniela, and also many football competitions. This application is a leader among its competitors, with more than 500,000 downloads in the Google Play Store.
Rating: 4.4/5 with more than 4,000 reviews in Google Play
Rating: 4.4/5 with more than 4,000 reviews in Google Play
Nestlé IT Innovation
I collaborated with the Nestlé IT Innovation department to build a Flutter application.
The application was a proof of concept for an app used to collect data for machine learning applications. The development work included a Flutter application (for Android and iOS) and a Firebase back end, which involved authentication, database, storage, functions, analytics, and the ML Kit.
The application was a proof of concept for an app used to collect data for machine learning applications. The development work included a Flutter application (for Android and iOS) and a Firebase back end, which involved authentication, database, storage, functions, analytics, and the ML Kit.
CaixaBank
https://play.google.com/store/apps/details?id=es.lacaixa.mobile.android.newwapiconI worked on the framework team while functioning as a part of a larger group of developers that created and maintained the personal banking app of Caixa Bank, one of the top banks in Spain, with more than 10 million downloads in Google Play.
Rating: 4.3/5 with more than 700,000 reviews in Google Play
Rating: 4.3/5 with more than 700,000 reviews in Google Play
TravelStorys GPS
http://travelstorys.com/I created an Android library and two Android apps for TravelStorysGPS based on its TravelStorys™ iOS app.
The development was done from scratch using Kotlin, replicating the iOS version of the libraries and applications, focusing on performance and stability.
The challenge was creating an architecture based on an internal SDK used in several TravelStorys apps developed by TravelStorysGPS.
Features included REST API, GPS positioning, background audio playback, and in-app purchases.
The development was done from scratch using Kotlin, replicating the iOS version of the libraries and applications, focusing on performance and stability.
The challenge was creating an architecture based on an internal SDK used in several TravelStorys apps developed by TravelStorysGPS.
Features included REST API, GPS positioning, background audio playback, and in-app purchases.
BizPhone Masvoz
https://play.google.com/store/apps/details?id=es.bebopstudio.bizphoneA BizPhone VoIP Android app for the Spanish telecom MasVoz. I successfully implemented the PJSIP libraries using Android NDK. Feel free to ask me for more details about this project!
Xelex
Xelex is a crypto wallet-related Kotlin development project. As an Android developer, I was involved in building some app modifications and adding stability improvements to the existing app to get it ready for deployment.
Education
1993 - 1999
Bachelor's Degree in Mathematics
University of Barcelona - Barcelona, Spain
Skills
Libraries/APIs
Firebase Android SDK, REST APIs, Google Gson, Google Maps SDK, Google Maps
Tools
Android Studio, Git, Firebase Cloud Messaging (FCM), Gradle, Trello, Google Cloud Messaging, Crashlytics, Firebase Analytics, Firebase Authentication, Jenkins, MoPub, Android NDK, Xcode, Moodle
Languages
Java, Dart, Kotlin, C++, PHP
Frameworks
Android SDK, Flutter
Paradigms
App Development, Mobile Development, Cross-platform
Platforms
Android, Firebase, Ubuntu, Mobile, iOS
Storage
JSON, Firebase Realtime Database
Other
Android Development, Mobile Apps, Native Mobile Apps, Google Play Store, Mobile App Development, Mobile Applications, Cross-platform App Development, Android Emulators, AdMob, Mobile Ads, Google AdMob, Operations Management, Functional Design, Operations, Product Management, Unix Shell Scripting, ML Kit, Firebase Cloud Functions, Mobile GPS, App Store, IT Project Management, Mobile App UI, IT Operations Management (ITOM), IT, Test Protocol Design, High Availability Disaster Recovery (HADR), Software Development, Mathematics, Applied Mathematics, Mathematical Analysis, Learning
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