🎯 USED BY 2,000+ CANDIDATES

Land Your Jane Street Offer

Quote bid/offer on a 52-card deck. Hit 72+ in Optiver's 8-minute math test. Solve the Monty Hall problem cold. 17 games, 144 real brain teasers — built from actual interview reports.

Recruiting season starts September — start now

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🔒 No account required. No sign-up. Free forever.

GAMES

BRAIN TEASERS

FIRMS MAPPED

⚡

73/80

Math Score

🎯

Ready

Jane Street

HOW IT WORKS

Interview-ready in 3 steps.

Download & pick your firms

Choose from Jane Street, Optiver, Citadel, and 5 more. FloorIQ customizes your practice plan to match each firm's format.

Practice 20 min/day

Market making, mental math, brain teasers. Spaced repetition focuses your time on the questions you keep getting wrong.

Walk in confident

Candidates report 2-3× improvement in mental math speed and spread tightness after just 2 weeks of daily practice.

WHY FLOORIQ

Reverse-engineered from
real interviews.

Every game reverse-engineered from real interview rounds. We talked to 50+ candidates to map every format used by top firms.

Market Making Simulator

Simulates Jane Street's Round 1: you quote bid/offer on a 52-card deck to a counterparty who knows the true value. Tighten your spreads from ±8 to ±2. Track P&L, hit rate, and spread tightness over time — the exact metrics that separate offers from rejections.

THE DECK · MOST POPULAR

Mental Math Blitz

80 arithmetic problems in 8 minutes — Optiver's exact screening test format. The cutoff is ~70. Candidates average +18 problems after 2 weeks of daily drills. Track your speed curve in real time.

SPEED DRILL

Brain Teasers SRS

144 real questions pulled from Glassdoor reports, Blind posts, and candidate debriefs at Jane Street, Citadel, and Optiver. Tagged by firm and round. Spaced repetition drills your weak spots — not the ones you already know.

SPACED REPETITION

Probability & Kelly

Dice markets, conditional probability, Kelly criterion — the exact topics Citadel and SIG test in Round 2+. Practice bet sizing under uncertainty until it's instinct, not calculation.

PROBABILITY

Performance Analytics

Track accuracy, P&L, speed, and streaks across every game. Firm-specific readiness scores tell you when you're above the offer threshold for Jane Street, Optiver, or any target firm.

ANALYTICS

Daily Challenges

New challenge every day — curated from the same problem types IMC and DRW use in phone screens. Streaks, XP, and leaderboards keep you accountable between interview rounds.

GAMIFICATION

17 GAMES

Every interview format covered.

From classic card deck market making to Greeks quizzes and Kelly criterion — we've mapped every test format used by top firms.

🃏

The Deck

FREE

⚡

Mental Math Blitz

FREE

🧠

Brain Teasers

FREE

🔢

Sequences

FREE

🎲

Dice Market

PRO

🌐

Make Me A Market

PRO

Probability Betting

PRO

📡

Information Flow

PRO

🍎

Fruit Market

PRO

📊

ETF Arbitrage

PRO

⚽

Sports Betting

PRO

Greeks Quiz

PRO

♠

Poker Odds

PRO

🔀

Cond. Probability

PRO

🔁

Martingale Quiz

PRO

🔥

Combo Drill

PRO

📉

Vol Estimator

ELITE

PRICING

Less than one Leetcode subscription.

Start free. Go all-in before your interview week.

Monthly

Yearly Save 38%

FREE

forever

4 core games
5 sessions/day
144 brain teasers
Basic analytics
Daily challenges

Download Free

No account required

FloorIQ vs. Alternatives

FloorIQ Pro

Leetcode

Greenbook

Mock Interviews

Market making practice

✓

✗

Mental math (Optiver format)

✓

✗

Brain teasers (SRS)

✓

✗

✓

✗

Mobile app

✓

✗

Firm-specific prep

✓

✗

✓

Price

$7.99/mo

$35/mo

$40 book

$150+/hr

TESTIMONIALS

From candidates who got the offer.

Real results from real candidates at top firms.

"The Deck game is a carbon copy of Jane Street's first round. After 200+ rounds in FloorIQ, my spreads tightened from ±8 to ±2. I got the offer on my first try."

Alex K.

Incoming Trader, Jane Street · MIT 2025

"Went from solving 45 to 73 problems in the 8-minute Optiver math test after 2 weeks of daily Mental Math Blitz. The speed drill mode is unmatched."

Sofia M.

Quant Researcher, Optiver · Stanford 2024

"The spaced repetition system is genius — it stopped me from wasting time on problems I already knew. Focused my last 10 days on weak spots and got Citadel first try."

Ryan T.

Quant Analyst, Citadel · Princeton 2025

"I prepped with Greenbook + FloorIQ. Greenbook teaches you the theory. FloorIQ gives you the reps. After 3 weeks of daily Deck sessions, market making felt like muscle memory."

Marcus L.

Incoming Quant Trader, IMC · Cambridge 2025

FAQ

Questions answered.

What makes FloorIQ different from other interview prep apps? +

FloorIQ is built specifically for quant trading interviews — not software engineering, not generic consulting. Every game mirrors real formats used by Jane Street, Optiver, Citadel, and IMC. The brain teasers come from actual interview reports, not textbooks.

Which firms does FloorIQ help me prep for? +

Jane Street, Optiver, Citadel, IMC, Two Sigma, DRW, SIG, Flow Traders, and more. The brain teasers are tagged by firm so you can focus on your target company.

Is the free tier actually useful? +

Yes. The Deck, Mental Math Blitz, Brain Teasers, and Sequences — the 4 most important games — are free forever. 5 sessions/day gives you enough daily practice for most candidates.

How long should I prep with FloorIQ? +

Most candidates see significant improvement in 2-4 weeks of daily 20-30 minute sessions. For mental math specifically, you need at least 2 weeks of speed drills to build the instinct.

Does FloorIQ work for non-native English speakers? +

The math and market making games are entirely language-independent. Brain teasers are in English, but the explanations are clear and thorough.

Can I use FloorIQ offline? +

Yes. All games and brain teasers work fully offline. Your progress syncs when you reconnect (iCloud sync available on Elite plan).

How does FloorIQ compare to just reading the Green Book? +

The Green Book is excellent for theory and concepts. FloorIQ is the practice layer — it gives you the reps. Think of it like reading about tennis vs. actually hitting serves. Most candidates who got offers used both together.

I have an interview in 2 weeks. Is that enough time? +

Yes. 2 weeks of focused daily practice (20-30 min) is the sweet spot. Focus on The Deck and Mental Math Blitz first — these cover Jane Street Round 1 and the Optiver math test. Then rotate in brain teasers and probability games.

Do I need to create an account? +

No. Download and start immediately. No sign-up, no email, no friction. Your progress is saved locally on your device. iCloud sync is available on the Elite plan if you want to use multiple devices.

Land Your Jane Street Offer