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Secure Multi-Tier VPC Architecture Design
Goal: Design a secure, highly scalable cloud network infrastructure for an e-commerce platform.
Solution: Architected a multi-tier Amazon VPC layout using Draw.io, strictly separating public web-facing resources from private backend databases. The design incorporates EC2 Auto Scaling groups, RDS database tiers, and Amazon S3.
Outcome: A comprehensive architectural blueprint demonstrating AWS networking best practices, security isolation, and fault tolerance without exposing internal databases to the public internet.
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"Zahid has successfully delivered and deployed HCM within our company."
That's from the client review that landed on my profile this week, for OneHub — the payroll and people-operations platform I built for TechFoundry. Monthly payroll with fiscal-year tax withholding, payslips and tax certificates on demand, expense reports read line by line by Claude, and one reporting layer so the dashboard, the payslip and the certificate always agree.
The word I care about in that review is "deployed". Delivered means the code works. Deployed means payroll runs on it every month, people are paid the right amount, and nobody has to call me.
The thing I'd do differently: the tax rules started out hard-coded. Fine for one country, one fiscal year — until it wasn't. We later pulled them out into a rules engine so the same payroll runs across countries without touching the code. Next time that's day one, not a refactor.
It's also a Contra-verified project — the work was paid through Contra, so the review and the case study are tied to the same engagement. Case study: https://contra.com/p/Y3EgrEUc-payroll-and-people-operations-platform
A complete premium furniture e-commerce platform combining a high-end storefront, business administration system, and interactive 3D product experience.
The customer-facing experience is designed around premium furniture discovery, with an interactive exploded-product presentation built using Three.js and GSAP, allowing furniture components to be visually revealed and explored in an engaging way.
Behind the storefront is a dedicated admin panel for managing the furniture business, including product/catalog and operational management.
The project demonstrates how advanced 3D interactions, premium UI/UX, e-commerce functionality, and business operations can be brought together into one complete digital platform—rather than treating 3D as a standalone visual effect.
14 pages is a lot. the file layout looks easy to use
