Unity VR Developer for User Interaction Tracking

Need a Unity VR developer to implement precise tracking of user interactions within a VR-based learning module, focusing on extracting defined performance metrics.
Key Requirements:
1. Time-Spent Calculation:
• Track timestamps when a user starts and completes the VR module.
• Calculate duration using `end_timestamp - start_timestamp`.
• Handle edge cases (e.g., pauses, session interruptions).
2. Interaction Metrics:
• Log attempts, correct/incorrect answers, and progression for each question/activity.
• Use Unity’s event-driven system (e.g., `OnTriggerEnter`, custom C# events) to capture interactions.
3. Data Structuring:
• Aggregate data into a structured format (e.g., JSON) for easy export.
Deliverables:
• Clean, reusable C# scripts for timestamp tracking and data aggregation.
• Documentation explaining how data is captured/stored.
Ideal Candidate:
• Proven experience with Unity VR projects and data tracking.
• Portfolio showing similar interaction/metrics systems.
Apply With:
• Examples of projects where you tracked user behavior in VR/3D environments.
• A 2-sentence summary of your timestamp-tracking approach.