I applied online. The process took 3 weeks. I interviewed at ZeroFox (Chile) in Sept 2025
Interview
There were 3 rounds of interviews after meeting with the recruiter: (1) a LeetCode sliding-window algorithm challenge, (2) a BFS coding challenge and a system design interview, (3) a third coding challenge also algorithm-based.
Interview questions [1]
Question 1
The system design interview was to design a URL shortener.
I applied online. The process took 1 day. I interviewed at ZeroFox in Jul 2025
Interview
1. Presentation: the interviewer and interviewee have the chance to present each other
2. Code challenge: you have the chance to choose between (1) code in an online pad that doesn't have the option to run the code nor code marking or (2) you can share your screen and use your own IDE. I chose 1, looking back, I should have chosen option 2.
## Given a list, find if there are duplicates within distance ‘d’ of each other.
## Examples
## [1, 2, 3, 1, 3] d=3 -> True
## [1, 2, 3, 1, 3] d=2 -> True
## [1, 2, 3, 1, 3] d=1 -> False
3. Questions about the position
Interview questions [1]
Question 1
Code challenge:
## Given a list, find if there are duplicates within distance ‘d’ of each other.
## Examples
## [1, 2, 3, 1, 3] d=3 -> True
## [1, 2, 3, 1, 3] d=2 -> True
## [1, 2, 3, 1, 3] d=1 -> False
I applied online. The process took 2 weeks. I interviewed at ZeroFox (Santiago) in Jan 2024
Interview
4 interviews
1 HR: expectations about salary and company
1 coding: easy problem
1 systems design: design a URL shortener system
1 coding: implement a Insert method for a BST
Interview questions [1]
Question 1
Searching (string array) and Data structures (BST)