Optiver Trader mock interview

Sequences Test (8-min numerical) + 80-in-8 Mental Math (~60-70/80 cutoff) gates the loop. Then market-making games + brainteasers + Superday. Y1 trader $200-350K, Y2-Y3 $400K-$1M+. Olympiad math background heavily over-represented.

  • ~50%+
    Filtered by 80-in-8 cutoff
  • ~60-70/80
    Mental math pass bar
  • $200-350K
    Y1 Trader TC
  • Free
    First mock

Why Optiver Trader is structurally different — Sequences + 80-in-8 are the gates

Per Optiver careers (optiver.com/careers, tools.optiver.com), WallStreetOasis 'Optiver Sequences' thread, QuantNet compilations, Reddit r/quant + r/csMajors candidate posts, Optiver Trader's most distinctive elements are two pre-screening tests: the proprietary Sequences Test (8-min numerical patterns) and the 80-in-8 Mental Math Test. The 80-in-8 alone reportedly eliminates 50%+ of trader applicants. Pass bar ~60-70/80. Most candidates underestimate this — even competition math backgrounds need weeks of daily drilling.

Three signals matter most for Trader screening: (1) mental math speed — 80-in-8 with decimal/fraction conversion fluency drilled to automatic; (2) market-making spread management — composure under interviewer trading against your bid/ask, updating with new information without folding; (3) Dutch directness fit — admit gaps honestly, take direct feedback, defend with logic when challenged, never bluff.

Compensation per Levels.fyi + WSO + Blind: Trader Graduate Y1 $200-350K (base $125-150K + sign-on $50K + guaranteed bonus $75-150K). Y2-Y3 performance bonus uncapped — frequently $400K-$1M+ reported. Comparable to Citadel Securities / Jane Street at junior. STEM degree + olympiad math background is the typical pool, but no finance background required (Optiver trains explicitly).

What the loop looks like

Round-by-round

  1. 01

    Application + Optiver Sequences Test

    Pre-onsite
    ~8 min

    Proprietary 8-min numerical pattern test, ~25 sequences, no calculator. Cutoff aggressive (top ~10-15% reported). This is the FIRST gate — most candidates filtered here.

  2. 02

    80-in-8 Mental Math Test

    Pre-onsite
    8 min

    80 arithmetic questions in 8 minutes. Decimals, fractions, negatives. Pass bar widely reported as ~60-70/80 for traders. tools.optiver.com has practice. PRACTICE THIS DAILY before applying.

  3. 03

    First-round video / phone interview

    Pre-onsite
    60 min

    Behavioral + brainteasers + market-making game. 'Make me a market on [windows in this building / sum of dice / EV of card draw]'. Spread management graded.

  4. 04

    Superday — Market-making simulation

    Onsite
    60-90 min

    Live market-making game with interviewer trading against your bid/ask. Updating prices on observed trades, managing risk on spread, handling adverse selection.

  5. 05

    Superday — Probability + EV

    Onsite
    60 min

    Conditional probability, Bayes, Monty Hall variants, 'fair price for this game' problems. Heard On The Street style. Practice probability puzzles with verbal narration before the loop.

  6. 06

    Superday — Poker / Game Theory

    Onsite
    60 min

    Poker-flavored game theory. Decision-making under incomplete information. Optiver values poker-style intuition for trading.

  7. 07

    Superday — Behavioral with senior trader

    Onsite
    45-60 min

    Dutch directness culture — push back expected. 'Tell me about a time you were wrong' (composure under being wrong-footed). Bluffing flagged immediately.

Question bank

Real interview questions reported by candidates

  • Mental math

    "80-in-8 sample: '0.42 × 1.7', '7/3 + 5/2', '-15 + 8 × 3', '(0.6)²'. Speed at decimal/fraction conversion is the differentiator."

    Source · tools.optiver.com practice site, WSO Optiver compilations
  • Sequences

    "Sequences Test sample: identify next number in 'a_n = 2, 6, 12, 20, 30, ...' (n × (n+1)) under 20 seconds. ~25 sequences in 8 min."

    Source · WSO 'Optiver Sequences' thread, QuantNet 2024 threads
  • Market-making

    "Market-making: 'Make me a market on the sum of two fair dice.' Standard pattern: bid 6, ask 8 (centered on 7 with width). Then interviewer trades — defend or update spread."

    Source · QuantNet Optiver compilation, WSO Superday reports
  • Market-making

    "Market-making with adverse selection: '20-card deck, 19 red and 1 black, draw until you stop. Price the game.' EV computation + spread management + observation updates."

    Source · Heard On The Street style, WSO Optiver
  • Probability

    "Probability: 100 prisoners + lightbulb problem. Optimal strategy + expected days to confirm everyone has been visited."

    Source · Heard On The Street, WSO Optiver brainteasers
  • EV

    "EV: 'Fair price for this dice game: roll until first 6, get $X = sum of all rolls.' Compute EV explicitly."

    Source · QuantNet Optiver compilation
  • Game theory

    "Poker / game theory: 'You and opponent each get a card 1-10 random. Higher wins. Each can bet. Optimal strategy?' Game theory under incomplete info."

    Source · Optiver poker round reports, WSO
  • Behavioral

    "Behavioral (Dutch directness): tell me about a time you were wrong about something important. Show composure under being wrong-footed."

    Source · Optiver Life at Optiver content, glassdoor 2023-2025
Common signals to fix

What gets you rejected at this level

  • Failing 80-in-8 cutoff

    Per WSO + Reddit r/csMajors: 80-in-8 mental math test is most common gate — reportedly eliminates 50%+ of trader applicants. Pass bar ~60-70/80. PRACTICE DAILY for weeks before applying. Use tools.optiver.com practice site. Not a once-and-done — speed at decimal/fraction conversion needs ongoing drilling.

  • Widening / moving market when interviewer 'trades'

    Per WSO Optiver Superday compilations: when interviewer trades against your market, candidates who panic and widen / move their bid/ask reveal they weren't confident in their original prior. Defending with logic OR updating with new information both score; folding under pressure flags weak conviction.

  • Hiding uncertainty / hand-waving probability

    Per multiple WSO + Glassdoor reports: Optiver penalises overclaiming heavily. Saying 'I don't know — let me think about it' scores higher than confident wrong answer. Bluffing on probability is fatal — interviewers calibrate to detect.

  • Cultural arrogance / name-dropping

    Per Glassdoor 2023-2025 reviews: arrogance, name-dropping, or inability to take direct feedback in real time = cultural fail. Optiver Dutch directness expects flat hierarchy + collaborative feedback. Confidence ≠ arrogance — show humility about gaps + reasoning under uncertainty.

  • Generic 'I want to be a quant'

    Optiver distinguishes from Citadel (pod-based aggressive) / Jane Street (intellectual research) / HRT (low-key engineering). Generic 'I want to trade' fails. Reference Optiver's firm-wide P&L (vs pod), Dutch directness culture, market-making focus (vs prop trading or fund management).

How Applr's AI mock interview tracks Optiver's Trader rubric

Applr's Optiver Trader mock simulates the 80-in-8 mental math format — timed arithmetic with decimal/fraction emphasis, drill-style preparation tracking. Sequences-style pattern recognition gets practice prompts before the actual test.

Market-making rounds simulate Optiver's pricing-game format — interviewer trades against your market with adverse-selection scenarios. Composure under being wrong-footed scored explicitly. Behavioral rounds prompt Dutch directness fit — admit-gap framings rewarded over confident-wrong answers.

Adjacent loops

Related practice

FAQ

How do I practice for the 80-in-8 mental math test?

Per Optiver's own practice site (tools.optiver.com): drill DAILY for weeks before applying. Topics: decimal-to-fraction conversion, percentage estimation, negative numbers, multi-step arithmetic. Pass bar ~60-70/80. Most common gate — eliminates 50%+ of applicants per Reddit r/csMajors reports. Don't underestimate — competition math people who haven't drilled mental math still fail this. Use Anki-style spaced repetition on conversion tables (1/7, 1/8, 1/11, etc. as decimals).

What is the Sequences Test really like?

Per WSO 'Optiver Sequences' thread + QuantNet 2024 threads: proprietary 8-min numerical pattern test with ~25 sequences. No calculator. Pattern recognition under aggressive time pressure (top ~10-15% reported pass rate). Cannot prepare beyond IQ-test-style pattern practice. Olympiad math / competitive programming background helps significantly. This is trader-specific — SWE applicants don't take this.

What's Optiver Trader comp?

Per Levels.fyi + WSO + Blind FY2024-25: Trader Graduate Chicago/Amsterdam base ~$125-150K USD, sign-on $50K, first-year guaranteed bonus often $75-150K, total Y1 commonly $200-350K. Performance bonus uncapped — Y2-Y3 traders frequently report $400K-$1M+. Comparable to Citadel Securities / Jane Street at junior; senior trader comp at Optiver generally below Citadel/JS for non-PM trader roles per WSO consensus.

Do I need finance background?

NO per Optiver careers — explicitly trains. STEM degree (math, physics, CS, engineering, quantitative finance) preferred. Olympiad math / competition math background is major plus per WSO consensus. Top universities (TU Delft, Cambridge, MIT, UChicago, NUS, Tsinghua) over-represented but not required. What matters more: mental math speed, probability intuition, ability to update under uncertainty.

Amsterdam vs Chicago vs Sydney — which to target?

All three offer similar Trader role with similar interview process. Amsterdam: Dutch Highly Skilled Migrant visa (generous + fast for new grads), 27% ruling tax benefit (post-2024), EUR comp lower in absolute but PPP-adjusted competitive. Chicago: H-1B path (lottery), USD comp highest in absolute. Sydney: 482 visa, AUD comp competitive with Chicago. For international students: Amsterdam often most accessible due to generous visa scheme.

What about poker / game theory background?

Helpful but not required. Per WSO + Optiver poker round reports: Optiver values poker-style intuition for trading (decision-making under incomplete information). If you've played poker seriously, mention it. If not, study basic game theory + fundamental poker EV reasoning before the Superday — interviewers notice the framework.

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