About
Hi, I’m Bijay K Pathak, a Software Engineer at AWS working on distributed systems and networking infrastructure.
I graduated from Michigan Tech in 2015 with an M.Sc. in Computer Engineering, where I did early GPU work using CUDA C on clustering algorithms. Since then I’ve spent years going deep on Linux kernel networking, TCP/IP, DNS, eBPF, and distributed systems at scale.
At AWS I work on Route 53, focusing on the Linux networking layer that powers one of the world’s largest DNS services.
Lately I’ve been focusing on AI infrastructure, specifically the networking layer that makes large-scale distributed training work. I’m interested in how frameworks like NCCL move data between GPUs, how RDMA and InfiniBand compare to Ethernet at scale, and what eBPF can tell us about what’s actually happening on the wire during collective communication.
This site is where I document what I’m learning. I write about things I’ve built and debugged, including things that didn’t work the first time.