RTMP Scoreboard Relay

I'm looking for a Flutter / Android developer (or team) to develop an Android app for RTMP relaying, with a Flutter UI. The application concept is very simple: receive a RTMP video stream from an external camera, overlay an HTML with the contents of the scoreboard, and restream the result to RTMP server like Youtube and such. All RTMP stream processing, including reception, image overlay and pushing is supported by [login to view URL] native Android library that will be provided as binary to the developer house (don't include it in the quote). The library is developed in Java & C++ in Android Studio and binary is provided as a .AAR file. As the library doesn't support HTML overlay directly, a headless browser will be used instead, and the contents transformed into an image for overlay at a given rate (for example, every 0.5 seconds). The browser needs to support JavaScript as the values of the scoreboard are updated using it. Here you have a basic interactive mockup of the UI: [login to view URL] The exact look and feel or widgets used are open to discussion. Those shown are the ones the tool allows me to create, but I'm open to both free and paid widget libraries, as long as licensed allows for "closed source" usage. Once this POC is validated, additional services needed to improve the app and include it in Google Android Marketplace (as a paid subscription) will be required. This will be an ongoing project, hopefully extending the UI into other nice improvements needed for youth / amateur sports broadcasting.