How to Pass the Optiver Software Engineer Interview in 2026

The Optiver DNA (TL;DR)

Optiver's infamous 80-in-8 mental math test anchors the early screen, signaling their obsession with raw computational speed. The loop grades for extreme low-latency decision-making, requiring candidates to excel at Explaining Markets under intense pressure.

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The Optiver Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, role fit, logistics.
2
Round 2
Coding Screen
LeetCode-medium algorithmic problems under time pressure.
3
Round 3
System Design
Distributed systems, trade-offs at scale, architecture under constraints.
4
Round 4
Onsite Coding
LeetCode-hard, debugging, code clarity, edge cases.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

Based on our database of Optiver interview outcomes, avoid these common traps:

Focusing on generic fintech buzzwords instead of Optiver's specific market-making model
Brute force O(n squared) approach
Using a global mutex that causes high contention
Performing synchronous I/O on the main thread

Test Yourself: Real Optiver Questions

Three real prompts pulled from our database.

Type · algorithm

Find the first non-repeating character in a string of order execution logs.

Type · architecture

How would you design a logging system for a trading engine that must record every packet without impacting the hot path?

Type · motivation

Why are you interested in low-latency trading systems specifically at Optiver compared to other high-frequency trading firms?

+ many more questions, signals, and worked examples

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Optiver Interview Question Bank

A sample from our database, grouped by round. Sign up to see the full set.

9 of 12 questions shown

Recruiter Screen

1
Type · motivation
Why are you interested in low-latency trading systems specifically at Optiver compared to other high-frequency trading firms?

Coding Screen

2
Type · algorithm
Given a stream of trade prices, implement a class that returns the moving average of the last N prices in O(1) time.
3
Type · algorithm
Find the first non-repeating character in a string of order execution logs.
+ 1 more questions in this round (sign up to unlock)

System Design

4
Type · architecture
Design a system that distributes market data updates to multiple internal trading engines with minimal latency.
5
Type · architecture
How would you design a logging system for a trading engine that must record every packet without impacting the hot path?
+ 1 more questions in this round (sign up to unlock)

Onsite Coding

6
Type · algorithm
Implement a thread-safe priority queue for managing pending order cancellations.
7
Type · debugging
You are given a snippet of C++ code that exhibits non-deterministic memory corruption. How do you isolate the bug?
+ 1 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · behavioral
Describe a time you had to optimize a piece of code that was already 'fast enough' but you identified further improvements.
9
Type · behavioral
Tell me about a time you disagreed with a senior engineer on a technical design. How did you resolve it?