About ArchCrux

I am Amit Kumar, a Principal Software Architect with more than fourteen years of experience building and reviewing backend and distributed systems.

I started ArchCrux because architecture diagrams usually show the clean part of a system. They rarely show what happens when queues grow, retries duplicate work, tenants compete for capacity, indexes drift, permissions change, or one slow dependency controls the tail.

ArchCrux is where I write through those problems in detail.

The focus is production AI and distributed systems, but the larger subject is engineering judgment: understanding which constraints matter, where correctness can break, and what a system needs before it can be trusted in production.

These essays are written for senior engineers, Staff engineers, Principal engineers, architects, and engineering leaders who want more than high-level diagrams.