Multiplayer Game App with Real-Time Voice Chat

FREELANCER JOB POSTING: MATCH WORD PROJECT (MVP)
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PROJECT TITLE:
Experienced Full-Stack Mobile Game Developer Needed for Real-Time Multiplayer Voice App (Fixed-Price MVP)

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1. PROJECT OVERVIEW
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I am seeking a talented, experienced freelance developer to build a functional prototype (MVP) for a turn-based, multiplayer mobile game designed with an elegant, ultra-simplified interface for a mature demographic. The core of the game relies on real-time multiplayer synchronization and voice communication.

To protect our intellectual property, the exact theme, visual assets, and gameplay loop will be shared ONLY after a freelancer is selected and a standard NDA is signed. This initial contract is for a Fixed-Price Milestone project to build the core structural engine.

*** PLEASE START YOUR PROPOSAL WITH THE PHRASE 'HELLO MATCH WORD' SO I KNOW YOU HAVE READ THIS ENTIRE DESCRIPTION. AUTOMATED OR GENERIC BIDS WILL BE DISREGARDED. ***

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2. REQUIRED TECHNICAL SKILLSET
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* Real-Time Multiplayer Architecture: Proven experience setting up lightweight, reliable server connections (e.g., WebSockets, Photon, or Firebase Realtime Database) to sync multiple player screens instantly via a 4-digit alphanumeric room code.
* Voice Integration & Audio Processing: Experience integrating real-time voice-chat APIs (such as Agora, Vivox, or Twilio) with the ability to implement real-time audio filters/voice masking.
* Turn-Based Logic: Experience programming strict, server-authoritative turn-based sequencing, timers, and automatic matchmaking/AI bot replacement if slots are unfilled.
* Cross-Platform Deployment: Must be built using a framework that easily deploys to both iOS (iPad/iPhone) and Android tablets/phones (such as Unity or Flutter).

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3. FIXED-PRICE MILESTONE STRUCTURE
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* Milestone 1: Visual Layout & Interface Shell (Static menus, lobby screen, large-print UI implementation).
* Milestone 2: Core Sync Engine & Database (4-digit room creation, device pairing, turn-based logic, and score tracking).
* Milestone 3: Full End-to-End Testing (Voice routing, live gameplay simulation with AI bot substitution, and point accumulation system).

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4. RULES OF ENGAGEMENT & COMMUNICATION BOUNDARIES
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To ensure a professional and respectful working relationship, the selected freelancer must adhere to the following communication guidelines:

1. Scheduled Updates Only: All project discussions, code reviews, and updates will take place during a single, pre-scheduled window on weekdays (between 9:00 AM and 5:00 PM local time).
2. No On-Demand Messaging: I will not respond to constant, unscheduled messages or high-pressure demands for my immediate attention throughout the day or night. All non-urgent questions must be compiled into a single daily summary or milestone update.
3. No Hidden Hourly Billing: This is strictly a fixed-price project based on the agreed milestones. No funds will be released until a milestone is fully completed, demonstrated, and tested on my end.
4. Strictly In-Platform Communication: All communication—without exception—must take place using the text chat tools directly inside the Freelancer platform. I will not share my personal phone number, Skype, WhatsApp, or private email address. Do not request them. Any attempts to contact me outside of the Freelancer platform will result in an immediate termination of the contract.