To build a multiplayer Texas Hold'em Poker game using Node.js and Flutter, you can follow this approach:

1. Backend with Node.js:

Use Node.js with Express.js for setting up your server and handling APIs. Implement WebSockets (e.g., using Socket.IO) for real-time communication between players, as poker is a fast-paced, real-time game. Use a game state manager to keep track of each player's cards, chips, and the game flow (pre-flop, flop, turn, river). Implement database support (e.g., MongoDB or PostgreSQL) to store player information, game history, and stats.

2. Frontend with Flutter:

Flutter can be used to create cross-platform mobile apps for both iOS and Android. For the poker game UI, you will need to create custom widgets for the poker table, cards, chips, and betting interface. Integrate the WebSocket connection to sync real-time events and updates from the server.

3. Game Logic:

Use a robust poker engine to handle the rules of Texas Hold'em (e.g., hand evaluation, bet calculations, determining the winner). You can either develop your own or integrate a third-party poker engine like PokerStove. Deployment:

For scalable multiplayer support, use AWS or Google Cloud to deploy your backend. You can also consider Firebase for real-time database syncing and authentication.

It may happened that you can get some issues related to code or other code issue. Then you can contact to poker game development companies like Creatiosoft, Connective Games, Slavna Games etc. These companies can assist with developing and deploying your poker game efficiently, leveraging their extensive experience in the gaming industry.