Paytm Software Engineer interview experience

The core prompt was to design a system that receives an exchange tick stream. It felt very focused and structured—one deep design discussion—followed by what I was told would be a home assignment and then a final managerial round if that HLD round went well.

The HLD interview itself was the main event: I had to lay out how the system would ingest the stream and think through the design at a high level. I remember feeling like the difficulty was tied less to getting a perfect algorithm and more to being clear about system boundaries and responsibilities. After I wrapped up, there was a clear