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Jump Trading Interview Guide

Tier 1 HFT
HQ: Chicago, IL

Jump Trading is one of the oldest and most successful HFT firms. Often considered "Tier 1" alongside Citadel and JS. Historically secretive, but now expanding heavily into Crypto (Jump Crypto) and Venture Capital.

At a Glance

Compensation

Intern: $16k/month
New Grad: $300k - $400k TC

Interviews

Focus: C++ (System Architecture), Signal Processing, Time Series.

Tech Stack

Core: C++ (Ultra Low Latency), Rust (Growing), Python.
Style: Pragmatic, Research-focused.

The Interview Process

  1. Online Assessment: C++ HackerRank. Can be tricky with pointers/memory.
  2. Phone Screen (Technical):"Explain the difference between TCP and UDP at the packet level." "How do you optimize a kernel for networking?"
  3. Onsite:Expect deep dives into past projects. "Why did you use MongoDB in your internship?" (Be prepared to justify everything).
    Also expect a pure math round (Linear Algebra).

Sample Questions

C++: The Singleton

Implement a thread-safe Singleton in C++11.
Why is this tricky?
(Hint: Double Checked Locking pattern is broken in older C++. Use `static` local variable magic in C++11).

Systems: The Context Switch

How many clock cycles does a context switch take? Why is it expensive? (Cache flushing, TLB flushing).