// a brutally hard challenge by caliber
BEAT THE GAUNTLET
We hand you a problem that most engineers can't solve cold in 3 minutes — the kind that requires an obscure algorithm you probably won't implement correctly from memory under that pressure. So use AI, use notes, use anything you want. The full proctoring engine reads every glance, paste, and twitch of your mouth. Get through it undetected and we pay you $100.That's the game: you stress-test our engine, the engine tries to catch you, and somebody walks away embarrassed.
// chapter 01 · the game
LeetCode hard. 3 minutes. On camera.
It's a real coding interview — a short series of genuine LeetCode-hard DSA problems, each with an 3-minute clock. Most engineers can't solve these cold from memory in 3 minutes. The proctoring runs the whole time. Use AI, use a second monitor, phone a friend — the engine is watching every move you make, and you'll explain yourself on camera after each one.
Every sensor goes hot
Live ID check, camera, mic, full-screen share, consent, a guided room scan, device fingerprint. The exact preflight a paid Caliber interview runs — no shortcuts, no demo mode. (Your ID is checked live and never stored.)
3 minutes. LeetCode hard.
Graph traversal, DP on trees, O(log n) or bust — the kind of problem that has a clean 40-line solution you probably won't derive from scratch in 3 minutes. Use anything you want. The clock runs. We log it all.
You explain it out loud
After every question, talk us through what you wrote — to the camera. Mouth tracking, gaze, and lip-sync run live. Did your lips match your story, or your second monitor?
We show you the tape
The verdict, the probability, every signal we logged — the same integrity report a recruiter sees after a real interview. Right answers and a clean log? That's a heist. File your claim and take the $100.
Pro tip — bring a second camera
If you can, set up a phone or second camera to film yourself playing. The best claims come with proof: a run that shows exactly how you beat it is the one that gets paid — and the one that teaches the engine the most.
// what we're watching
The same engine we ship to clients
This isn't a demo skin. The Gauntlet mounts every proctoring sensor a paid Caliber interview runs — recordings, computer vision, telemetry, live escalation. Here's what it logs while you play:
Mouth tracking
Lip-open + lip-sync vs your audio
Gaze direction
Iris position, off-screen glances
Face count
A second person in frame
Head pose
Yaw / pitch when you look away
Frame replay
Static / piped-in video feeds
Screen reflection
Off-axis monitors in your cornea
Clipboard
Every paste, timestamped
Tab & focus
Switches, blur, fullscreen exits
Extensions
Helper plugins probed + named
Room scan
Guided 360° before the clock starts
Background audio
Coaching voices off-camera
Device fingerprint
Virtual cameras, odd rigs
// chapter 02 · the bounty
Beat the engine. Get paid. Make it smarter.
The $100 heist
The task is too hard to solve cold in 3 minutes — a right answer almost certainly means you had help. That's by design. Get it done without tripping a single sensor — no gaze flag, no paste log, no second face, no extension ping — and the bounty is yours. A human reviews every claim against the tape and pays out the clean ones. Win or lose, your run is what we train the engine on: every cheat that slips through makes it harder for the next one.
A free rep on the real engine
Even if you don't take the money, you walk out with something rarer: the real integrity report recruiters see after a proctored interview. Real sensors, real pressure, and at the end you learn exactly what the other side of the camera sees — before an interview that actually matters.
// chapter 03 · where this is going
Soon, playing the game is the application.
Today the Gauntlet is a stress test for our proctoring engine. Tomorrow it's the front door to hiring itself: sit a real proctored challenge, and a strong, clean run routes you straight into live pipelines — no resume screen, no cover letter, no recruiter gatekeeping. You prove it once, on camera, and the roles come to you.
that product is being built now — here's what it opens up
The Gauntlet exists to harden our proctoring — but the people running it are recruiters, and it's the front door to the same platform they work on. Walk through it and three things open up:
The dream-role gap map
Bring your resume and the job description you wish you could land. We run them through the same matching engine our clients pay for, map every gap, and build a structured training plan — then aim you at the closest role we hold a real, live requirement for. Not generic advice. A path to a specific desk.
Skills marketing
Sometimes the role you want doesn't exist yet. If you're good enough, that's our problem, not yours: we take your profile to market ourselves, pulling industry connections built over decades to put you in front of the people who should be inventing that seat for you.
The placement guarantee
Here's the part that makes the rest credible: we only get paid when you get placed. Our fee is entirely contingent. If we take you on, an unplaced you is worth exactly nothing to us — so we are built, top to bottom, to do everything it takes to land you.
Your incentives. Our incentives. Same number.
candidates never pay a fee · we earn on placement, full stop
// leetcode hard · 3 minutes · $100 on the table
Think you can beat it?
The engine says you can't. $100 says you'll try.
by entering, you agree we record your screen, webcam + mic for this run and process the video for integrity signals (you'll confirm consent in the preflight). bounty: $100 per verified clean run — correct answer, zero integrity signals, recording reviewed by a human; one payout per person. the gauntlet is a standalone challenge — it is not a job application and shares nothing with a real interview.