Upstox - Software Development Engineer Intern

The telephonic screening round was conducted by the recruiter and was mainly introductory. I was asked to give a brief self introduction, followed by questions related to my academic background, coursework, previous internship experience, and projects mentioned on my resume. The recruiter also explained the overall interview process, timelines, and confirmed my availability for the upcoming technical rounds.

This was a detailed technical round that lasted around 1.5 hours and took place one week after the screening. Two coding questions were asked. The first question was Minimum Number of Platforms Required for a Railway Station. I initially explained a brute force approach, discussed its time complexity, and then optimized the solution using a better approach. I performed a dry run on sample inputs before implementing the final code. The second question was Majority Element. I started with a basic brute force approach and then optimized it using Moore’s Voting Algorithm, explaining why it works and its time and space complexity. Apart from coding, I was asked detailed questions on Object Oriented Programming, where I explained all four pillars with examples. DBMS questions included normalization, ACID properties, and one SQL query. A few questions were also based on my resume and project work.

The managerial round was conducted three days after the technical round and lasted around 30 minutes. This round focused mainly on understanding my project experience and practical knowledge. I explained my projects in depth, covering system architecture, technology stack, deployment flow, testing strategy, and challenges faced during development. The interviewer also asked scenario based questions related to handling production issues, testing practices, and teamwork. The overall discussion was friendly and interactive.