Optiver Interview Questions
Practice 83 real Optiver interview questions for 2026. This Optiver interview questions collection is designed for interview preparation and includes real questions from actual interviews with detailed solutions. Lean heavily on coding and systems thinking: expect Coding & Algorithms and System Design problems first, then Statistics & Math, Behavioral & Leadership, and Analytics & Experimentation. For Software Engineer roles (the bulk of our set) recurring themes include designing low‑latency trading infrastructure and queue/data‑structure problems (circular and object‑oriented queues), algorithmic optimization and backtesting of trading strategies, and fast probabilistic/expectation calculations under time pressure. Data Scientist interviews concentrate on probability and expectation puzzles, sequence and pattern‑detection in streams, optimization puzzles (min‑moves, transforming layouts), and communicating statistical tradeoffs to traders. Use this set to simulate timed mental math and whiteboard coding, rehearse system tradeoffs that prioritize latency and correctness, and build clear STAR stories for behavioral loops.
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Design an Event-Driven CPU Overheat Controller
Design an Event-Driven CPU Overheat Controller Design an OverheatPreventionController that simulates multiple processor cores without physical sensors...
Design a News Subscription Processing Engine
Design a news subscription processing engine with four core capabilities: receive a news item, add a subscription, remove a subscription, and publish ...
Design a Multi-Level Expiring Item Store
Design a Multi-Level Expiring Item Store Design a class with initialization, store, and retrieve operations for items placed into ordered storage leve...
Design low-latency trading infrastructure
This question evaluates understanding of low-latency trading system architecture, networking and protocol trade-offs (TCP/IP vs UDP), time synchroniza...
Answer why SWE and why Optiver
Behavioral Interview: SWE Intern at a Proprietary Trading Firm You are interviewing for a Software Engineer internship at a high-frequency / proprieta...
Maintain Price Levels For A Single-Symbol Order Book
Review a single-symbol order book implementation prompt with insert, modify, cancel, and price-level lookup callbacks. The interview topic focuses on ...
Design a topic-based news subscription system
Topic-Based News Subscription Service — Design and Implementation Context Build an in-memory service that manages subscribers and delivers relevant ne...
Reviewing a Freight-Scheduler Codebase: Bugs, Data Structures, and Concurrency
You have just finished implementing process_order(...) inside a large provided codebase for a freight-scheduling system (this is the review stage of a...
Plan for timed probability assessment
Timed Probability/Statistics Assessment Strategy Company: Optiver · Role: Software Engineer You are taking a timed online assessment of 30 probability...
Design a balloon stability tracker
Implement a class BalloonFestival to manage hot-air balloons and wind fields over time, and to report rewarded balloons at inspection times. Methods a...
Optiver Beat The Odds: Five Rapid-Fire Probability Brainteasers (Dice, Cards, Coins, Pigeonhole)
You are taking a timed online quantitative assessment (in the style of Optiver's "Beat The Odds" test). It consists of rapid-fire probability question...
Analyze an Unfair-Coin Bankroll Game
A player starts with a bankroll of 10. Each round, a biased coin is heads with probability 0.6 and tails with probability 0.4. On heads the bankroll i...
Calculate the Probability That Two Dice Sum to Seven
Roll two independent fair six-sided dice. What is the probability that their sum is 7? Show the sample space and favorable outcomes. Then explain why ...
Design a subscription push service
Design a subscription push service Object-Oriented Design: Publish/Subscribe Notification Service Design an object-oriented publish/subscribe notifica...
Design a satellite propagation simulator
Design a satellite propagation simulator Object-Oriented SatelliteNetwork: Message Propagation Simulator Design and implement an object-oriented Satel...
Find the Color Probability After Discarding Cards
A standard 52-card deck has 26 red and 26 black cards and is uniformly shuffled. Discard the first 10 cards without observing their identities. What i...
Optiver SWE Intern HR Screen: Project Deep Dive — Hardest Parts, What You'd Do Differently, and Questions to Ask
You are on a 20–30 minute recruiter (HR) phone screen for a Software Engineering Intern position at Optiver, a high-frequency trading firm. The call s...
Solve numeric sequence pattern puzzles
Sequence Pattern Puzzles This is a timed pattern-recognition section of the kind used on quantitative-trading aptitude tests. You are given five indep...
Compute probabilities and expectations in random processes
This is a rapid-fire probability and expectation round: a sequence of short, self-contained brain-teasers solved on a whiteboard. The interviewer expe...
How to rank statements by likelihood
This question evaluates proficiency in data interpretation, probabilistic reasoning, and statistical literacy for ranking statement likelihoods from v...