Replay Engine

A state-of-the-art time-travel debugger for human interviews, enabling recruiters to review sessions with granular control.

Synchronized Event Playback

The Replay Engine doesn't just play back video. It reconstructs the entire interview state—the code editor, console output, AI transcript, and telemetry flags—in perfect synchronization with the audio-video track.

Features

▶️ Smart Skip: Automatically jump to moments where the candidate struggled or compiled code.
🔍 Deep Inspection: Hover over the timeline to see exact code diffs at any timestamp.
📊 Telemetry Overlay: View flagged events (e.g., focus lost) mapped directly onto the timeline.

[Video Stream Mock]

Event Sourcing Architecture

During the live interview, every keystroke, scroll event, and API response is logged as an immutable event stream in our distributed database. The Replay Engine fetches this stream and applies it sequentially to a headless DOM, ensuring pixel-perfect recreation of the candidate's environment.

{
  "event_id": "evt_9876xyz",
  "timestamp": 1718042500,
  "type": "EDITOR_CHANGE",
  "data": {
    "file": "solution.py",
    "diff": "@@ -1,3 +1,4 @@\n def twoSum(nums, target):\n-    pass\n+    seen = {}"
  }
}