Readiness and your plan need JavaScript. The firm's process below does not.
The process
Reviewed November 2026
Trader and researcher online assessment (2026/27 modules)
Online assessment, reported by candidates and guides
timed multiple choice
- NumberLogic Sequences, Numerical reasoning
- Beat the Odds Probability, Expected value
- Likelihood list Probability
- Intervals Estimation
- Orderbooks Market making, Mental math
Official FAQ confirms online assessments on the Optiver Assessment Portal, once per 8 months, no retakes; module names and sizes come from candidate-quoted invites. Module set varies by region and cycle.
80 in 8 mental arithmetic test
Online assessment, reported by candidates and guides
timed multiple choice, 8 min, 80 questions, +1 / −1, no calculator, forward only
- Mental arithmetic Mental math
+1/-1 reported (one older source says -2). Not listed in 2026/27 invites; may be legacy or region-specific.
Zap-N cognitive games
Game assessment, reported by candidates and guides
game-based
- Cognitive mini-games Cognitive games, Mental math
Software engineering coding test
Online assessment, reported by candidates and guides
coding
- Coding problems Coding, Algorithms
Technology candidates reportedly take HackerRank plus Zap-N instead of maths modules.
Behavioural interview with recruiter
Phone screen, stated by the firm
live interview
- Motivation and fit Behavioural
Final day interviews
Final round, reported by candidates and guides
live interview
- Trading and betting games Market making, Betting games, Expected value
- Technical probability interviews Probability, Mental math
Final-day interview for campus roles is official; contents from candidate reports.
What it tests
| Topic | Weight |
|---|---|
| Probability | 18% |
| Mental math | 12% |
| Expected value | 12% |
| Market making | 12% |
| Betting games | 10% |
| Cognitive games | 8% |
| Sequences | 6% |
| Estimation | 6% |
| Coding | 5% |
| Behavioural | 5% |
| Algorithms | 4% |
| Numerical reasoning | 2% |
Shares estimated from the public sources below.
Practise for it
Offices
Amsterdam, London, Chicago, Austin, New York, Sydney, Hong Kong, Shanghai, Singapore, Taipei, Mumbai
Sources
Format changed for 2026/27 (new Likelihood, Intervals, Orderbooks modules; 80 in 8 not in recent invites). Official FAQ is Europe-specific.
- Applying to Optiver Europe: Recruitment FAQ firm's own page
- Optiver 80 in 8 guide guide
- Zap-N guide
- Trader Maths: Optiver 2026/27 assessment guide guide
Compiled from public sources, retrieved 2026-11-03. Optiver has not reviewed or endorsed this page.