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      Horizon3.ai

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      Senior Attack Engineer Interview

      16 May 2026
      Anonymous employee
      Accepted offer
      Positive experience
      Difficult interview

      Application

      I applied through an employee referral. I interviewed at Horizon3.ai in Apr 2026

      Interview

      Recruiter screen → Hiring manager interview → Technical round 1 (60 min live coding): if you know OOP, it'll be mildly challenging, but you'll be fine—no FAANG-like Leetcode BS needed (but definitely helps to have firm grasp of DSA) → Technical round 2 (60 min grilling over vuln research methodology/offsec/exploitation/computing internals): this is hard, and intentionally so. They go deep. A mix of extremely specific questions with only one right answer and broadly open-ended questions. → Decision

      Interview questions [1]

      Question 1

      Tell me about your SWE experience.
      Answer question

      Other Senior Attack Engineer interview reviews for Horizon3.ai

      Senior Attack Engineer Interview

      12 Mar 2026
      Anonymous interview candidate
      San Francisco, CA
      No offer
      Positive experience
      Difficult interview

      Application

      I applied online. I interviewed at Horizon3.ai (San Francisco, CA) in Oct 2024

      Interview

      4 step interview 1st non-technical 2nd technical, had to hack into one of their machines and write it up step by step. They cared a lot about the write-up part of it 3rd manager 4 other manager

      Interview questions [1]

      Question 1

      Are you familiar with neo4j, graph DBs and python
      1 Answer