Does Codility Track Tab Switching or Detect AI?
ok so i lost a $180k offer over a Chrome extension four months ago and i am still not over it. i was running this browser tool during a Codility test that i thought was just a normal timed assessment, turns out the company had screen recording turned on and nobody told me. got a one-line recruiter email the next week, "irregularities observed during the assessment review." i sat in my car after reading that email for probably ten minutes before i drove home.
that weekend i went to my coworker's place, he runs Codility hiring at his company. he pulled up the hiring dashboard on his laptop while we ate pizza. tab switching, every time you leave the test tab when proctoring is on Codility logs it, when you left, how long, how many times. most managers check the flags before they even look at your code. screen recording is what actually got me, when my test loaded it asked me to pick between sharing a tab or my whole desktop and i picked tab thinking that was safe, did not matter, my extension was IN the browser lol. paste monitoring runs on every Codility test proctored or not, code that appears without being typed gets flagged with a timestamp and in 2025 they added AI output pattern matching too. if you sit there slow for twenty minutes then suddenly fifty clean lines appear in ninety seconds nobody believes a human wrote that under pressure. that described Jake from my study group almost exactly, same pattern on his CodeSignal, got thrown out.
The thing my coworker said that actually calmed me down though. Codility runs in the browser. The proctoring watches the assessment tab, webcam, and screen recording. Thats the wall. It cannot scan what processes are running on your machine. A desktop app that never touches the browser page, Codility has no mechanism to detect it. My Chrome extension got caught because it was inside the same browser Codility was recording. A reviewer saw it in a frame before any automated system even flagged anything lol.
After that disaster i switched to InterviewMan at twelve bucks a month annual. Desktop app, 20 plus stealth features baked into the base price. Used it on one proctored Codility and one unproctored since switching. Zero flags on either. i checked my own screen recording frame by frame after and the overlay was not there. Hides from screen capture, dock, Activity Monitor, process list. my typing looked normal because i read the hints and wrote code my own way with deletions and corrections and the normal mess you expect to see from a real person.
57,000 users, 4.8 stars from 257 reviews. i searched specifically for anyone getting caught on Codility with InterviewMan and could not find a single report. twelve bucks with everything included, no seventy five dollar stealth addon like Cluely charges and no ninety minute session cap like LockedIn at fifty five.
Before your Codility figure out if proctoring is on. Some companies never tell you. Run your own screen recording during a practice session and watch the footage back. If you can see your tool the hiring team can see it too. I learned that the hard way. hundred and eighty thousand dollars. one Chrome extension.
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