I applied through university. The process took 2 days. I interviewed at GammaStack (Indore) in Jul 2021
Interview
Coding Round - consist of 4 Questions (1Easy,2Medium,1Hard) followed by two Technical Round of 1hour each Question where asked from Database mainly,puzzle, Dynamic Programming followed by HR round, in all the four round candidate were shortlisted
Interview questions [3]
Question 1
Q. Write a code to find first repeating character in a given string.
It means the review process goes step by step — first to L1 (initial reviewer), then to L2 (senior reviewer), and finally to HR for the final verification or approval before completion.
First round 4 coding questions
Easy to medium based on string and array
We were given 1 hour 15 minutes to solve them on online coding platform and we were able to run test cases
Round 2 Technical interview
Round 3 HR
I applied online. I interviewed at GammaStack (Bengaluru) in Mar 2025
Interview
Technical Interview – Round 1
Focus: Core Technical Skills
Duration: 45–60 minutes
In this round, interviewers evaluate your fundamental technical knowledge
Coding
Algorithms and data structures
API development
Database queries
Language-specific questions
Technical Interview – Round 2
Focus: Advanced Concepts and Practical Scenarios
Duration: 60–75 minutes
This round typically dives deeper into:
System design or architecture (for experienced roles
Debugging or optimization scenarios
Role-specific challenges
Understanding of development lifecycle, tools, and best practice.
Interview questions [1]
Question 1
1. Core concepts of nodejs and javascript.
2. DSA question.
3. System design question.
4. Database design question
