I applied online. I interviewed at Sigmoid in Jan 2026
Interview
It was 4-5 rounds, I got eliminated in R3. The interview style is Okay, first rund was a hacker rank kinda test, with 7q's out of which 6 are pure medium level DSA and was only given 30 min to answer somehow I cleared you gotta be very quick. round 2 was with a lead data scientist.
Other Senior Data Scientist interview reviews for Sigmoid
Round 1 : Online test series
Section A -> 5-6 basic python coding rounds
Section B -> 2 pandas and numpy questions
Round was morderately easy, but spped is crucial
Round 2 : Classical + GenAI based . Questions on XGBoost, ML
Round 3: More from resume, about projects and how would I do them without Gen AI.
Round 4: HR -> Cultural fitness,
Interview questions [1]
Question 1
Let's say you have worked on binary classifier random forest model, and both the classes recieved equal number of votes. How will you proceed further, what is your logic behind it?
I applied through an employee referral. I interviewed at Sigmoid (Bengaluru) in Jan 2026
Interview
Had interview rounds after getting a referral + technical online test. Appeared for 3 rounds - 2 Technical + 1 HR. Technical rounds tested your ability in Python, ML, GenAI and previous projects. Came to know in the 3rd round that they won't be able to match salary demands even though I shared the same before the start of the interview process itself. I got ghosted after this. Absolute waste of my time and effort.
Interview questions [1]
Question 1
Project Discussions, some generic questions on numpy, pandas, ml, hypothesis testing and rag
