Bolt.SH
An OpenStack-powered IaaS data center I designed and built, with VM orchestration, virtual networking, and load balancing that let teams self-serve infra.
Watch the walkthrough series →Principal Backend Engineer · Bangalore, India
Faiz Ahmed Farooqui
I build compliance-heavy backend infrastructure for regulated industries: secure, multi-tenant systems for fintech, healthcare, and SaaS. Think PCI-DSS payments, HIPAA data platforms, and audit-ready architecture on AWS and OpenStack. I write about the engineering behind it.
Featured work
GeekyAnts/express-typescript Production-ready Express + TypeScript boilerplate. My most widely adopted open-source project, used across 20+ production apps. ★ 1,261 ⑂ 325 GitHub → faizahmedfarooqui/nodejs A low-level Node.js web, API, and CLI app built entirely on Node's core APIs, with zero npm packages. ★ 21 ⑂ 1 GitHub → Project · GeekyAnts
Latest articles
fintech
Idempotency Keys: How Stripe-Style APIs Prevent Double Charges
A customer taps "Pay." The request reaches your server, the charge succeeds, and then the response times out on the way back. The client sees a failure and does the obvious thing: it retries. Now you have charged them twice. This is not an…
auth-and-identity
OAuth 2.0 and OIDC: A Backend Engineer's Guide to Login
Here is the question OAuth was invented to answer: how do you let an app do something on your behalf without handing it your passw…
auth-and-identity
Passkeys and WebAuthn: How Passwordless Login Actually Works
A password is a secret you and the server both know. That is the original sin of the whole scheme: because the server has to store…
ai-engineering
How I Actually Use AI to Ship Code: Context Engineering Over Clever Prompts
The last post in this series was about what not to feed an AI: keep your secrets out of the prompt. This one is the other half of…