Hi, I am Karthik

I am a software engineer at PhonePe, where I help build products people use every day. I care about clear systems, reliable software, and the details that help teams ship well.

Outside of work I am a security enthusiast: I like digging into how things break, how they are defended, and how we can design with security in mind without getting in the way of good experiences.

This site is for longer notes—mostly engineering, sometimes security-adjacent topics, and whatever I am learning. Browse the blog or read more about me.