<aside> 💡 네오 오디오 is a audio-book streaming service launched from Neocomix, a partnership company of Mindslab, Inc.

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Project Duration

2020.10 ~

Important Features

• Provides a streaming service of audio books, which are generated by TTS engine of MindsLab.
  • The audio files can be uploaded using a simple admin web app. The files are stored at AWS S3, and provided to authenticated users via Cloudfront.
• Authenticates the users using Firebase, and requests to streaming service via AWS Cloudfront and Lambda@Edge.
  • The client (mobile app and admin) uses Firebase SDK for Flutter and web, respectively. The server authenticates id token provided by client, using Firebase Admin SDK.
  • The requests to media files at Cloudfront are intercepted by Lambda@Edge, and the token at the HTTP header is authenticated.
• We are developing Android and iOS app at once, using a platform-independent mobile framework: Flutter.
  • We maintain clean code structure, using Provider and BLoC patterns.
    • Provider pattern is used for the general part of the code.
    • BLoC pattern is used where the data updates rapidly, such as handling the media state stream (position, queue, etc).
  • Minimizing network calls by caching of network results, using GraphQL client library in Flutter.
  • For native features (such as, media notifications in Android and iOS), we use method channel interfaces to communicate between Dart code and native code.

Role

• I am working as a project maintainer and core developer in this team.

Stack

• Mobile front-end: Flutter, Firebase (FlutterFire), graphql_flutter, Native Android
• Web front-end: ReactJS, Apollo GraphQL
• Backend: AWS, Serverless Framework, GraphQL, TypeORM
• CI/CD: Docker, Jenkins, Fastlane