Unity WebGL Rummy Multiplayer

About the Project
We’re enhancing an existing Unity-based multiplayer Rummy game for mobile web browsers. The goal is to deliver a smooth, native-like mobile experience with precise touch interactions, seamless payments, and essential security hardening.
No game logic changes are needed—focus is purely on UI/UX refinement, wallet/payments, and security hardening.

We’re looking for a Unity developer who understands mobile web performance, touch-driven interfaces, and secure integration workflows.

Your Mission
Optimize and polish the existing Unity WebGL build to deliver:
Flawless mobile-first UX – especially for iOS Safari/Chrome and Android Chrome.
Smooth drag-and-drop, snapping, scaling, and board interactions matching a reference Rummy app.
Points wallet + Tranzila payment integration (one-time purchases).
Session management (one session per user, auto-logout).
Basic security hardening for a production environment.

Responsibilities:
Mobile UI/UX Optimization
Fix card scaling, board resizing, UI overlaps, touch precision, and drag-and-drop behavior on mobile browsers.
Ensure smooth card movement, snapping, board scaling, and visual feedback.
Match the interaction quality and “game feel” of a reference Rummy app (provided).

Payment & Wallet System
Implement a points wallet system tied to user accounts.
Integrate Tranzila payment gateway for one-time points purchases.
Ensure automatic wallet credit and transaction recording.

Session & Security
Implement one-active-session-per-user logic.
Add auto-logout after inactivity.
Apply basic security hardening: input validation, session protection, API authorization.

Performance & Compatibility
Ensure smooth performance on mobile web (WebGL).
Test across iPhone (Safari/Chrome) and Android (Chrome) browsers.