Interview Experiences

Real candidates, real loops: every round, what was asked, and how it ended.

Share yours, earn XP

9 stories

Likes earn the author +10 XP for the first 3 likes each day

Two SigmaQuantitative Software Engineer
Jul 2026

Order-Matching HackerRank Then a Quant Systems Deep Dive

Round 1: HackerRank Coding — Stock Exchange / Order Matching The task was to implement buy/sell order matching: Buy side uses max priority. Sell side uses min priority. Match orders when the price can cross. Handle partial fills. Output trade records. Handle the remaining resting orders. Follow-ups: How to add more tests to increase confidence. Why my output didn't match the sample. How multiple…

Technical Screen0
Two SigmaSoftware EngineerNew Grad
Jun 2026

Two OA Questions, Advanced the Next Day

I applied for Two Sigma's New Grad SWE role. I didn't have much hope going in — not long after a mass application round, I got an OA invite: two problems to solve together in one time-limited session. Before applying I'd heard this company has a lot of rejection stories, so I specifically went and dug through the forum to do my homework. Several posts said the OA questions on the forum were the a…

In progressOnline Assessment0
Two SigmaSoftware Engineer
May 2026

Order Matching Coding Round Plus a GenAI Manager Round

Locked — open it to unlock the full story with XP.

RejectedTechnical ScreenXP0
Two SigmaData Scientist
Apr 2026

Piecewise Interpolation, Temperature Prediction, and Streaming Linear Regression on the OA

This Two Sigma research OA is also an old question that's been floating around on the forum. Question 1: You're given a bunch of discrete points that connect into a polyline. Now you're given an x, and you need to compute the corresponding y. If x falls between two points, do linear interpolation; if it falls outside the range, extend the line segments on either end to compute it. The question ma…

Online Assessment0
Two SigmaSoftware Engineer
Dec 2025

Rejected After One Technical Screen on a Huffman-Style Encoding Problem

11.9 – applied 11.12 – OA 11.24 – got the invite for the next round 12.1 – interview 12.3 – rejection letter The interviewer's English was really good, and he was patient and kept trying to guide me, but at the time I just couldn't understand why we needed to build a tree to encode things. It wasn't until later that it clicked — it's to get a unique binary representation, so that the most frequen…

RejectedTechnical Screen0
Two SigmaData Scientist
Dec 2025

Nailed the Good-Pair Expectation Problem, Still Rejected

A premium story — unlock it to read the full loop.

RejectedTechnical ScreenPremium0
Two SigmaData ScientistIntern
Nov 2025

A Markov Chain Curveball and a DP Fix Five Minutes Too Late

A premium story — unlock it to read the full loop.

RejectedOnsitePremium0
Two SigmaSoftware Engineer
Sep 2025

Trie-Tree OA, Rejected on a Permutation Question

A premium story — unlock it to read the full loop.

RejectedOnsitePremium0
Two SigmaQuantitative ResearcherIntern
Sep 2025

A HackerRank OA With a Linear Interpolator and a Multi-Part Regression Problem

A premium story — unlock it to read the full loop.

Online AssessmentPremium0

What are interview experiences?

An interview experience is a candidate's own account of a hiring loop — not a question bank entry. It tells you the shape of the process: how many rounds there were, what each round actually tested, how long the gaps between them ran, and what the recruiter said at the end. That context is the part a question list cannot give you.

How to read them

Weight recent write-ups more heavily — interview loops change, often within a year. Read several for the same company and role rather than one: a single account tells you what one interviewer asked, while five tell you what the bar is. Note the outcome badge too, since a rejection write-up usually explains the gap far more precisely than an offer one.

Share your own

Every published experience earns 50 XP, and each of the first 3 likes it receives in a day earns you 10 XP more. Likes must come from established accounts; like-for-like swaps and likes from your own second account are not paid. Write it while the details are fresh — the round order, the exact prompts, and how much time you were given are what the next reader needs.

Share your experience to earn XP