Android Real-time off-water rowing training (multiplayer game)

The main product is an off-water rowing training machine named The Stroke Master (TSM). [login to view URL] has lots of information about it. Please read and learn about this technology. Crew Innovations is a self funded startup. We are looking for an experienced Android developer with specific experiemce in realtime multiplayer games, specifically for PhotonEngine SDKs ([login to view URL]) This project is aimed at the development of the online, realtime interface between these machines. This interface is an Android App. This is not a production App, but a demonstration App. The connection between 2 machines looks like this: Motor <-> MCU <-> Android App <->Server <-> Android App <-> MCU <-> Motor Motor: This is the electric motor that creates the load (i.e. haptic feedback) felt by the rower. MCU: This is the motor control unit. This unit reads real data such as speed, torque, voltages, etc. and controls the motor. Android App: this is the real time, multiplayer "game", that players interface with. They make user accounts, they log in, they looks for "games" or "rooms", they see graphics that show them the state of the "game", where "game" is actually a multi-person rowing training session. Server: This is a Platform as a Service like Photon Engine, AppWarp, etc. This provides master server for matchmaking service, and game servers for realtime data transmissions. from here on, we will use the following terms: Rowing Session: equivalent to a "room" or "game". 2 or more users connected, where actions of one user affects the Rowing Session state of all other users. User: a person with a TSM and a SyncRow account The Android App is named "SyncRow". SyncRow is to be developed in Android Studio, starting from a blank or appropriate template project. Either Java or Kotlin languages are acceptable. SyncRow should support Android version 7.0 and up. SyncRow interacts with the server for multiplayer game features. (This part is this project). SyncRow interacts with the MCU for realtime machine control. (This part is a different project, that will work collaboratively with this project). This project will develop SyncRow in the following stages: Stage 1] Basic Data transmission. Demonstrate: - create user account - user log in - user search for Rowing Session, or create a Rowing Session - user enter Rowing Session, - once 2 or more users are in a Rowing Session, SyncRow continuously sends a message to all other users in the Rowing Session. - the sender sends messages which contain the following data: a. user name c. 8bit rolling counter 0-254 d. 8bit zero value e. 16bit rolling counter 0-65535 f. 16bit zero value g. 16bit downward rolling counter 65535-0 - the receiver displays a box which shows the senders user name, and value of the 8bit counter - the sender sends message every 10 milliseconds, so 100 messages per second. - Rowing Session is terminated when all users exit. Stage 2] Boat and Seat create and select. Here, each Rowing Session can have between 1 and 4 boats, and each boat can have between 1 and 8 rowers(users). The idea is that the user that creates a Rowing Session can decide how many boats they want to allow in their Session, and can decide how many rowers are needed for each boat. the default Rowing Session is 1 boat, 2 rowers. There are much more details about this in the task for this stage. All work will be committed/pushed to company private bitbucket repo. (you will be given access). All work will be reviewed, and verified by me. I require that I can build .apk files, install on appropriate devices, and perform functional testing. this project will have staged deliverables. Please do not bid a ridiculously low price, just to get my attention, and then try to negotiate afterwards. I am not interested in private negotiations. The selected bidder will be one who looks at the project requirements carefully, and bids what they think it is worth to them.