I applied online. I interviewed at Susquehanna International Group (Philadelphia, PA) in June 2021
Interview
Overall 4 round. Applied online through linkedIn and took around 3 weeks for complete process.
Round 1 - Coding challenge
Round 2 - Telephonic interview for 1hr
Round 3 - Video interview on zoom
Round 4 - Video interview on zoom
Beware to the interviewers, specially on the video calls. They are very picky & closed to only solutions they 'think' is the valid solution.
I asked about projects, sounds like lot of manual work (creating VM manually etc) and manager sounds very rude.
Interview questions [1]
Question 1
Round 1 - Coding challenge
Q. Bank debit/credit problem
Q. Create a thread safe singleton class.
Q. SQL Schema of grocery store.
Round 2 - Telephonic interview for 1hr
Q. Tell me about urself.
Q. Questions around coding challenges.
Q. Describe your project.
Q. Relation db vs nosql db
Round 3 - Video interview on zoom
Q. Coding challenge to improve C# code, 30 mins to improve the code.
Q. Questions around Dictionary and complexity.
Round 4 - Video interview on zoom
Q. Routing request to different servers
Q. SQL Schema of grocery stores
Overall process is fine. The main problem they didn't respond to my email after the final interview.
- interview with Hiring manager about experience related to the job
- on site interview with several python questions and simple leetcode task + system design task
I applied through a recruiter. I interviewed at Susquehanna International Group (Dublin, Dublin) in July 2025
Interview
The online stages were pretty simple given my seniority (15+), and the online interview was nice. You have to implement tickers lookup by the headline, mentioning the company names. As fast as possible of course.