AI Overlay for Coderbyte Assessments on Mac
Coderbyte is the assessment tool of choice for smaller tech employers, accelerators, and coding bootcamps screening junior engineering candidates. It also has a heavy practice-library side. Their proctoring is browser-based and covers full-screen recording plus webcam and tab analytics.
Coderbyte was founded in 2012 by Daniel Borowski in New York City. The product started as a practice site and grew into a full assessment platform aimed at startups, accelerators, and bootcamp graduates. The proctoring stack is unusually candid about what it does: tab-leaving detection, full-screen recording via Session Rewind, webcam eye and face tracking with deepfake detection, copy-paste capture, cross-candidate plagiarism, and a log of every Google search the candidate made if the employer enabled the in-tab Google box.
Key points
- Coderbyte uses Session Rewind for full-screen recording. Browser screen-capture on macOS excludes overlay windows.
- Webcam tracking includes deepfake detection scanning for synthetic face video.
- The optional in-tab Google search box lets candidates search without leaving the tab. Every query is logged to the report.
- Cross-candidate plagiarism checks compare your code to other Coderbyte submissions.
- Tab-leaving detection logs both the leave and the duration.
- Some bootcamps enable 100% unique code mode, which rejects boilerplate similarity above a threshold.
How it works
┌── macOS host ─────────────────────────────────┐ │ ┌── Safari/Chrome ─────────────┐ │ │ │ ┌── proctoring extension ─┐ │ │ │ │ │ Browser screen-capture │ │ ← reads │ │ │ │ → exam recording │ │ visible │ │ │ └─────────────────────────┘ │ pixels │ │ └──────────────────────────────┘ │ │ │ │ ┌── LDBypass overlay ──────────┐ ← rendered │ │ │ ChatGPT / Claude / Ollama │ excluded │ │ └──────────────────────────────┘ from cap │ └───────────────────────────────────────────────┘
Compatibility on Mac
| macOS 14 Sonoma+ | Yes (required for window-privacy API) | ✓ |
| Apple Silicon (M1/M2/M3/M4) | Native arm64 build | ✓ |
| Intel Macs (2019+) | Universal binary supported | ✓ |
| Coderbyte assessments | Browser-only, Session Rewind respects privacy | ✓ |
| Coderbyte webcam proctoring | Eye + face tracking on webcam, not screen | ✓ |
| Coderbyte practice library | Unproctored, overlay irrelevant | ~ |
Common questions
Does Coderbyte deepfake detection affect the overlay?
Deepfake detection looks at the webcam feed for signs of synthetic or composited faces. The overlay never touches the webcam pipeline.
Will the tab-leaving counter increment if I look at the overlay?
No. The overlay does not steal focus from the test tab.
Can Coderbyte see the overlay through Session Rewind?
Session Rewind records what the browser can render. On macOS, browser screen capture is filtered for window privacy by the OS.
What about the in-tab Google search log?
If the employer enabled the in-tab Google box, every search you type there is logged. Use the overlay for AI assistance instead.
Is Coderbyte common in actual hiring or mostly practice?
Both. Coderbyte is used by hundreds of smaller tech employers and bootcamps for assessments.