Akash Bhuiyan: Backend Engineer

Akash Bhuiyan

Backend engineer. I write about what production actually asks of a system that a whiteboard never does.

A design looks clean until real traffic, real failure modes, and real trade-offs show up. This site is where I work through that: what held, what needed a second pass, and what I’d do differently now. Written in public, without pretending it was clean the first time.

Design Desk

A separate system-design library on this site: concept explainers and full case studies, each with a working diagram, not a slide.

33 Foundations articles2 case studies10 tracks & groups

Java and Spring Boot get their own track, not a footnote squeezed into generic pseudocode.
Payments is a track on its own: idempotency, ledgers, settlement, not a checkout flow bolted onto a to-do app.
Diagrams move. A cache hit and a cache miss are different paths through the same system, watch the request take each one instead of reading two boxes and imagining the rest.

Start Here

Foundations

Akash Bhuiyan

Design Desk

Core Concepts

Storage & Data

Networking & Delivery

Architecture Patterns

Security

Reliability

Observability & SRE

Web-scale

Java & Spring

Payments

Writing

Hardening the Guest Gate: Three Flaws, Three Fixes

Typed Error Codes Across the Stack: How We Built API Error Contracts Without Magic Strings