Using FaangCoder on CoderPad.
CoderPad is the live-coding editor used by ~70% of FAANG-tier loops — Sandbox, AI-content detection, paste tracking, and the Enterprise tier that pairs with Amazon Chime.
CoderPad is the most common live-coding round in the FAANG-tier interview loop. The consumer product is a focused editor with paste tracking and an AI-content detector. The Enterprise product layers a server-side proctor, custom content scripts, and Amazon Chime screen-share. FaangCoder's headline proof point — the one we stake the brand on — is that it has not been caught on CoderPad Enterprise.
Will it run on CoderPad?
Operating system
Windows 10 / 11 (x64)
Browser
Chrome / Edge / Firefox — CoderPad runs in any modern browser
Overlay model
Native Win32, no browser extension, no DOM injection
Known conflicts
None on CoderPad Sandbox or Enterprise. Both products treat the browser tab as the proctor surface; the desktop is out of scope.
One Alt-combo per action.
Every workflow is a single keystroke. No mouse hunting mid-round, no menu pop-ups for the proctor to log.
| Combo | Action | Note |
|---|---|---|
Alt + Enter | Solve — read problem, propose solution | — |
Alt + 1 | Debug — re-read state, fix the failing test | — |
Alt + 2 | Optimize — re-read once more, cut complexity | — |
Alt + V | Voice mode — read response audibly, keep eyes on camera-visible region | Recommended on CoderPad Enterprise rounds with Chime webcam. |
Alt + ' | Audio-priority solve | — |
What CoderPad's proctor actually does.
Paste detection
CoderPad logs every paste event into the editor and surfaces them in the recruiter's playback. A high paste count or large pasted block is a heuristic flag.
FaangCoder types the solution character-by-character at calibrated pacing. No paste events fire. The recruiter playback shows the same key cadence as your manual typing.
AI-content detector
CoderPad shipped an AI-content scoring layer in 2024 that estimates the probability that a submitted solution was generated by an LLM. Tunes against burst patterns, code structure regularity, and known model fingerprints.
Pacing controls + paraphrasing layer reduce the structural regularity. Rebuild patterns naturally during typing rather than emitting a single coherent block.
CoderPad Enterprise: server-side proctor + content scripts
Enterprise rounds add a custom proctor content script injected into the candidate's tab. The script runs in the page's JS context and can probe for browser-extension fingerprints, focus events, and clipboard activity at higher fidelity than the consumer Sandbox.
The content script runs in the browser tab. FaangCoder lives outside the browser entirely — there's nothing for the script to see. No `chrome.runtime.id` extension fingerprint, no DOM injection, no clipboard signature.
CoderPad Enterprise + Amazon Chime
Enterprise rounds typically pair with Amazon Chime for video and screen-share. Chime captures the screen via DXGI Desktop Duplication on Windows.
FaangCoder is excluded from the display pipeline before DXGI duplication can read the overlay region. The Chime stream shows the browser tab and nothing else.
What the recruiter sees.
Consumer CoderPad doesn't run native screen-share — interviewers pair with Zoom or Meet. CoderPad Enterprise pairs with Amazon Chime, which uses DXGI Desktop Duplication to capture the screen. FaangCoder's display-pipeline strip happens upstream of DXGI, so the captured frames don't include the overlay region.
Test the screen-share behavior yourself on the /proctor page — same detection vectors a real proctor uses, runs in the browser, no install.
CoderPad questions, answered.
Has FaangCoder been caught on CoderPad Enterprise?
Does CoderPad's paste detector flag FaangCoder?
Will the proctor see anything in Amazon Chime?
What about CoderPad's AI-content detector?
Does CoderPad detect AI usage in general?
Field guides for the rest of the loop.
FaangCoder on HackerRank
the most-used coding-interview platform — full-screen mode, tab-switch tracking, plagiarism similarity
FaangCoder on CodeSignal
home of the IQ Score and Certified Evaluations — keystroke biometrics, LLM-output similarity, full-screen mode
FaangCoder on LeetCode
practice surface + LeetCode for Companies (proctored take-home assessments) + timed contests with submission similarity
Walk into the CoderPad Enterprise round prepared.
$399 lifetime ($199/mo monthly option). Install in 60 seconds, prove it on /proctor before the round.