Optiver Interview Process & Prep
Optiver's interview is built around one thing: can you trade? The signature filter is a live betting / market-making game played against a real trader, and even the Quant Researcher track is expected to think like a trader. Expect a brutal timed online assessment (sequence puzzles + rapid probability + reaction mini-games), fast mental math throughout, and a culture-fit final round that is famously blunt.
The Optiver interview funnel
1. Online Assessment
~3 hr · CodeSignal · multi-sectionThe first gauntlet, and a heavy filter. Four kinds of section, often spread across days: NumberLogic (timed find-the-pattern number sequences), Beat the Odds (20–30 rapid probability questions, ~90s each, pick the closest), Zap-N reaction mini-games (balloon-inflation gambling, stacking, dual-task arithmetic, pattern/number-memory — speed & nerve), and a coding section (2–3 business-flavored medium–hard problems). A 2026 variant adds a 'Likelihood Test': rank three events by probability from a chart/table. Deliberately long and anti-GPT; frequently auto-rejected on submission.
2. Trading / Betting Game (Tech 1 & 2)
25–45 min · interactive · 1-on-1 with a traderOptiver's signature filter, for BOTH the QT and QR tracks. On a game-like platform you get a bankroll and several rounds: bet across simultaneous boards (3 coin flips, 2 dice, 3-card draws) whose odds reshuffle each round, plus a market-making sub-game where you quote a two-sided market on the sum of three cards. A trader trades against you and asks 'why this bet.' They score Kelly sizing, spotting arbitrage when odds are mispriced, and risk discipline — not raw P&L. Too conservative = cut. Rehearse the exact muscle with the games below.
3. HR / Behavioral Call
~20 min · recruiterA short conversational round: why Optiver, why trading / quant, other offers, visa/sponsorship, and a walk-through of a project. Functions as a culture/logistics check and lays out the remaining flow.
4. Technical / Brain-Teaser (QR track)
60–75 min · Zoom whiteboard · with a researcherThe QR technical round: 3–4 problems mixing probability, conditional expectation, number theory, and brain-teasers — plus a Fermi estimation. Recurring favorites include the two-piles-of-stones doubling invariant, the bus-waiting paradox, a Latin-square diagonal-sum proof, and 'how many years until you're 97.5% sure the price exceeds 100.' They want a clean argument, not just an answer.
5. Take-Home Data Project + Deep-Dive (QR track)
Take-home · then ~45 min presentationQR candidates get an algo-trading dataset and build/backtest a strategy. It's graded on realized profit, not R² — a clean linear model is enough to pass. About two days after you submit, you're invited to a presentation / deep-dive where they probe your methodology hard, with heavy follow-ups on pandas and time-series handling.
6. Market-Making Game Day (QT track)
Interactive · multiple rounds · trading floor or virtualThe QT-distinctive round(s). A reported format: 5 rounds, target total score ≥ 2.0 — each round the trader poses a numeric estimation question and you quote a closed interval [L, U]; you score L/U if the true answer lands inside (tighter = higher), 0 if it falls outside. A horse-race variant gives 4–8 horses with win-probability proportional to ability for fast EV / odds estimation (watch for arbitrage). Onsite QT can be a full day of trading games and group exercises. Rehearse with the market-making game below.
7. Final — Culture-Fit
~45 min · with a hiring manager / partnerNominally a behavioral round with a senior partner, but functionally a fit / taste decision — it's the round most famous for rejecting technically-strong candidates. Conversational and free-flowing; the partner may interrupt at any moment out of curiosity. Expect 'why quant, not academia', a probe of your personal story, 'what's your edge over others', a blunt self-ranking of your strengths/weaknesses vs your cohort, and what you want from a career. A fast turnaround either way, and an ~8-month cooldown after a rejection.
Optiver interview — FAQ
What is the Optiver interview process?
Optiver's interview is built around one thing: can you trade? The signature filter is a live betting / market-making game played against a real trader, and even the Quant Researcher track is expected to think like a trader. Expect a brutal timed online assessment (sequence puzzles + rapid probability + reaction mini-games), fast mental math throughout, and a culture-fit final round that is famously blunt. The loop runs 7 stages: Online Assessment, Trading / Betting Game (Tech 1 & 2), HR / Behavioral Call, Technical / Brain-Teaser (QR track), Take-Home Data Project + Deep-Dive (QR track), Market-Making Game Day (QT track), Final — Culture-Fit.
How many rounds does Optiver have?
7 stages in total, starting with the Online Assessment and ending with the Final — Culture-Fit.
How do I prepare for the Optiver interview?
Work the stage notes above, then drill the Optiver interview-questions set — each problem has a full worked solution.