How Susquehanna (SIG) Interviews in 2026: Process, Questions & What They Score

1. 01

   Solve an algorithmic problem such as computing maximum drawdown or compound interest over a data series.

   Tests array scanning; max drawdown falls out of tracking the running peak in a single pass.

2. 02

   Implement an object-oriented design task from scratch, e.g., a library-style class with filtering/search methods, then extend it with new requirements live.

   Tests live object-oriented design: build a class with filtering and search, then extend it on the fly.

3. 03

   Given an existing piece of code, optimize it for time/space complexity and refactor for readability/SOLID principles, then explain your changes.

   Tests refactoring: improving time and space complexity and readability while explaining each change.

4. 04

   Medium-to-hard LeetCode-style problems involving 2D arrays/matrices, trees, graphs, or linked lists (commonly delivered via CodeSignal or Codility).

   Timed coding screen; tests medium-to-hard problems on matrices, trees, graphs, and linked lists.

5. 05

   System-design discussion: design a real-time market-data feed or an order-book matching engine, covering data storage, APIs, low-latency constraints, and edge cases (independently corroborated as a recurring SIG system-design theme).

   System design: they probe data storage, APIs, low-latency constraints, and order-book edge cases.

6. 06

   Explain a past project in technical depth (a 'project deep-dive' segment is a recurring Superday component).

   Project deep dive; tests genuine technical depth and ownership of decisions on past work.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   You flip a coin repeatedly until you get two heads in a row. What is the expected number of flips? (a recurring SIG-attributed question across multiple sources; answer is 6)

   Tests expected-value recursion on coin-flip states; conditioning on early flips yields the answer of 6.

2. 02

   If the probability of seeing at least one hawk in one hour is 0.8, what is the probability of seeing at least one hawk in half an hour? (widely reported and independently corroborated as a SIG question, sometimes phrased with shooting stars instead of hawks)

   Probability puzzle; the insight is independence across half hours: solve 1 - (1-p)^2 = 0.8.

3. 03

   You're offered a bet: pay $10 to play; partway through, the interviewer offers to double the bet to $20. What minimum win probability would make it correct to accept the double?

   Tests mid-game expected-value reasoning: find the win probability where doubling the stake breaks even.

4. 04

   Two-coin/Bayes' theorem style problem: given a coin might be fair or biased, update your probability estimate after observing a sequence of flips.

   Tests Bayesian updating: revise the fair-versus-biased posterior after each observed flip.

5. 05

   Standard expected-value problems involving drawing cards, rolling dice, or picking balls from an urn under various payoff rules.

   Tests expected-value setups over cards, dice, and urn draws under varied payoff rules.

6. 06

   Solve a linear system, single-variable calculus, or combinatorics problem quickly under time pressure (recurring format in the online assessment).

   Timed assessment; tests speed on linear systems, single-variable calculus, and combinatorics.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   Make me a market (bid/ask) on the number of dominoes in a standard domino set (a well-documented, specifically SIG-attributed classic).

   Market-making exercise; quote a bid/ask around the true count of 28 and size the spread to your confidence.

2. 02

   In a market-making card or dice game, quote a two-sided price on an unknown outcome and manage your resulting position as new information (cards) is revealed.

   Tests quoting two-sided prices under uncertainty and adjusting the market as revealed cards add information.

3. 03

   In a poker hand where you have roughly a 30% chance of winning, the pot is $100 and your opponent bets $50. Do you call? Justify with pot odds/EV (corroborated as a SIG-specific example).

   Tests pot-odds arithmetic: calling 50 into a 150 pot needs 25 percent equity, and 30 percent clears it.

4. 04

   General 'walk me through your decision-making' prompts after a hand or game outcome, probing whether you can reason about EV, edge, and information rather than just the result.

   Tests process over results: justify decisions in terms of EV, edge, and information, not outcomes.

5. 05

   Group market-making exercises during the Superday where multiple candidates trade against each other on a synthetic asset.

   Live group exercise; tests quoting, position management, and adapting to other candidates' flow.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   Estimate a Fermi-style quantity, e.g., how many AAA batteries are sold in the UK each year (independently corroborated as a SIG-used Fermi question).

   Fermi estimation; tests decomposing an annual quantity into population, usage, and replacement assumptions.

2. 02

   Grid path-finding or optimization puzzles (e.g., counting distinct paths or optimal routes under constraints).

   Tests combinatorial path counting and constrained optimization on grids.

3. 03

   Rapid mental-arithmetic drills under time pressure as part of the timed online assessment.

   Timed mental-arithmetic screen; tests fast, accurate computation under pressure.

4. 04

   Logic puzzles involving weighing, sequencing, or deduction with limited information.

   Tests deduction with limited information: weighing, sequencing, and elimination logic.

Reported problems, listed so you know what to expect. Practice them in your own editor or on the platform you prefer; SupaCV's practice mode coaches how you talk through them.

1. 01

   Why do you want to work at SIG, and why trading/this role specifically?

2. 02

   Tell me about a time you had to handle a difficult team member or disagreement.

3. 03

   How would you describe yourself in three words?

4. 04

   What is your greatest weakness?

5. 05

   Do you have competing offers, and what are your visa/sponsorship needs? (typically asked by the recruiter, not the technical interviewer)

6. 06

   Describe your work style and how you'd fit into a small, collaborative team.

7. 07

   What competitive or strategic activities have you pursued (sports, chess, poker, quant competitions), and what did you learn from them?