Squarepoint Capital interview process (2026)

Round-by-round breakdown of the Squarepoint Capital software engineering interview across 3 levels and 14 rounds: interview mode, sample questions, and worked solutions.

Squarepoint Capital salary & ratings · All interview processes

Graduate Software Developer

Difficulty: Medium · Timeline: ~2-4 weeks · Recommended prep: 6-8 weeks · Cooldown: ~6-12 months

  1. Round 0: Online Assessment (C++ implementation)

    Assessment · ~90 min · difficulty 3/5 · elimination round

    Mode of interview: Online assessment

    Sample question: You receive tick data on stdin, one line per trade in the format timestamp,symbol,price. Lines may be blank or malformed (missing fields, unparsable price) and must be skipped. For each symbol, in order of first appearance, print the symbol and its maximum traded price to 2 decimal places.

  2. Round 1: Technical Round 1 — C++, OOP & OS fundamentals

    Onsite · ~45-60 min · difficulty 3/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Write a C-style function void reverse(char *s) that reverses a NUL-terminated string in place without using any library functions, then walk through why it is safe for empty and single-character strings.

  3. Round 2: Technical Round 2 — Advanced C++, Linux & live coding

    Onsite · ~60 min · difficulty 4/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Estimate the value of pi using a Monte Carlo simulation: read the number of samples N from stdin, generate N random points in the unit square, and print 4 * (fraction inside the quarter circle) to 6 decimal places. Use a fixed seed so the result is reproducible.

  4. Round 3: Head-of-Tech + HR Round

    Behavioral · ~40-45 min · difficulty 2/5

    Mode of interview: Live behavioral interview

Software Developer (2-5 yrs)

Difficulty: Hard · Timeline: ~3-5 weeks · Recommended prep: 6-8 weeks · Cooldown: ~6 months

  1. Round 0: Recruiter Screen

    Phone · ~30 min · elimination round

    Mode of interview: Remote phone or video interview

  2. Round 1: HackerRank Online Assessment

    Assessment · ~90 min · difficulty 3/5 · elimination round

    Mode of interview: Online assessment · HackerRank

    Sample question: You are given K files, each containing trade records sorted by timestamp, with up to N total records. Merge them into a single stream sorted by timestamp using O(K) extra memory beyond the output, and explain the complexity of your approach (heap of K cursors, O(N log K)).

  3. Round 2: Technical Interview — DSA + language deep-dive

    Onsite · ~60 min · difficulty 4/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Implement an LRU cache with O(1) get and put. The driver reads the capacity and Q operations (PUT k v / GET k) from stdin and prints the result of each GET. Then discuss: what changes if multiple threads access it?

  4. Round 3: Math, Probability & Puzzles Round

    Other · ~45-60 min · difficulty 4/5

    Mode of interview: Interview format varies by team

    Sample question: 8 people, 3 of whom wear red shirts, sit uniformly at random around a round table. What is the probability that no two red-shirted people sit next to each other?

  5. Round 4: Hiring Manager / Desk Head Round

    Behavioral · ~45 min · difficulty 3/5

    Mode of interview: Live behavioral interview

Senior Developer

Difficulty: Hard · Timeline: ~4-7 weeks · Recommended prep: 8-10 weeks · Cooldown: ~6-12 months

  1. Round 0: Recruiter Screen

    Phone · ~30 min · elimination round

    Mode of interview: Remote phone or video interview

  2. Round 1: Live Coding Screen

    Phone · ~60 min · difficulty 4/5 · elimination round

    Mode of interview: Live interview · HackerRank CodePair

    Sample question: Build a fixed-capacity price-level order book supporting add(order_id, side, price, qty), cancel(order_id) and best_bid()/best_ask(), all O(log N) or better. Discuss which container you chose for price levels and why.

  3. Round 2: Low-latency Systems & Design Round

    System_design · ~60 min · difficulty 5/5

    Mode of interview: Live system design interview

    Sample question: Design the process that consumes a raw multicast market-data feed (~2M messages/sec at open) and serves the latest consolidated book to 30 strategy processes on the same host with p99 added latency under 10 microseconds. Cover message parsing, book building, fan-out (shared memory vs sockets), and gap recovery.

  4. Round 3: Advanced Internals & Concurrency Round

    Onsite · ~60 min · difficulty 5/5

    Mode of interview: Onsite or virtual onsite interview

    Sample question: Two threads increment a shared counter 1M times each using a relaxed atomic fetch_add. Is the final value deterministic? Now replace it with a plain int protected by no lock — what exactly can go wrong at the hardware level, and how would you detect it with perf or TSan?

  5. Round 4: Head of Technology / Behavioral Round

    Behavioral · ~45 min · difficulty 3/5

    Mode of interview: Live behavioral interview

Other companies' interview processes

Worked sample solutions (code, design diagrams, and STAR answers) for every round are available in the FAANGPlus app: open interview processes.