Using FaangCoder on LeetCode.
LeetCode is practice surface + LeetCode for Companies (proctored take-home assessments) + timed contests with submission similarity.
LeetCode is mostly the practice surface — and on that surface there is essentially no proctoring. The interesting cases are LeetCode for Companies (proctored take-home assessments hosted on the LeetCode platform) and LeetCode contests, which run plagiarism similarity on submitted code. FaangCoder runs on all three, with the same architecture we use for the more aggressive proctor stacks.
Will it run on LeetCode?
Operating system
Windows 10 / 11 (x64)
Browser
Chrome / Edge / Firefox — LeetCode runs in any modern browser
Overlay model
Native Win32, no browser extension, no DOM injection
Known conflicts
None. LeetCode practice has no proctoring; LeetCode for Companies runs the proctor inside the browser tab and doesn't enumerate desktop processes.
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 + S | Study Mode — turn the system-design graph into clickable drilldowns | Useful for LeetCode Premium system-design problems. |
Alt + ' | Audio-priority solve | — |
What LeetCode's proctor actually does.
LeetCode practice (no proctoring)
LeetCode's main practice surface has no proctor. Submissions are scored for correctness only — no plagiarism scan, no timing analysis, no screen-share.
No defense needed. Use FaangCoder freely on practice problems to build the muscle memory for live rounds.
LeetCode contests — submission similarity
Weekly and biweekly contests run a similarity check on submitted code post-contest. Top-scoring submissions that match a cluster of other submissions get filtered from the final leaderboard.
Paraphrasing layer keeps submissions varied. We don't optimize for the contest leaderboard, but the scan does not flag FaangCoder users in our testing.
LeetCode for Companies — proctored take-home
Take-home assessments hosted on LeetCode for the hiring company. Runs paste detection, focus-loss tracking, and a recorded session log. Some companies enable webcam.
Same response as HackerRank Skills Verification. No focus theft, no paste events, overlay outside the camera frame.
LeetCode Premium / mock interview
Mock interview is a self-paced timer with no proctor. Premium subscription for solution explanations.
No proctor surface to defend against. Use Study Mode for the system-design drilldowns Premium provides.
What the recruiter sees.
LeetCode does not run native screen-share. For LeetCode for Companies rounds, recruiters sometimes pair with Zoom or Meet — FaangCoder is excluded from those streams via the display-pipeline filter, same as on HackerRank and CoderPad.
Test the screen-share behavior yourself on the /proctor page — same detection vectors a real proctor uses, runs in the browser, no install.
LeetCode questions, answered.
Can I use FaangCoder on regular LeetCode practice?
Does LeetCode for Companies detect FaangCoder?
Will the LeetCode contest similarity check flag the overlay?
Does LeetCode have any kind of AI detector?
Can I use Study Mode with a LeetCode Premium subscription?
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 CoderPad
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
Drill on LeetCode. Show up calibrated for the live round.
$399 lifetime ($199/mo monthly option). Install in 60 seconds, prove it on /proctor before the round.