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Sci-Tech Unraveled, Simplified and Related
@TwistedTechie


The Magic of UPI: Unpacking the Tech Stack of India's Financial Backbone
Every time you tap your phone to split a dinner bill, a chain of cryptographic handshakes older than the World Wide Web fires off in under 400 milliseconds. The engineers who built it won't publish the full spec. The banks running on it barely understand it. And yet this silent mathematical machinery now processes transactions worth Rs. 20.64 lakh crore every single month. (Source: NPCI, March 2024) This is the real story of UPI; not the QR codes and the cashback offers, but
Rushi Joshi
May 16 min read


The e-Rupee: India’s Programmable Monetary Revolution
The RBI built a government-backed digital currency, launched it two years ago, and rolled it out to millions of users across the country. You've probably never touched one. That's not an accident — it's the most revealing story in Indian fintech right now. ▸ The Ghost Currency in Your Bank's App The e₹ (e-rupee), India's Central Bank Digital Currency (CBDC), went live in phases starting in November 2022 for the wholesale segment and in December 2022 for retail. The RBI has be
Rushi Joshi
Apr 285 min read


The Hidden Carbon Debt of India's Solar Energy Transition
India's Solar Panels Are Making Climate Change Worse, Not Before — The Carbon Debt Crisis Nobody Talks About That rooftop solar panel you installed last year? It's still in carbon debt. The clean energy future you paid Rs. 2.5 lakh for is running on coal — just coal that burned somewhere in Xinjiang, not Jharkhand. And at India's current installation pace, this dirty irony is scaling into a genuine policy crisis. ▸ The Carbon Debt Hidden Behind Every Panel Every solar panel c
Rushi Joshi
Apr 245 min read


The Invisible Architecture of India's Digital Economy
The Invisible B2B Layer Powering Every App You Actually Use You've never heard of the company that processed your UPI refund, verified your Aadhaar, and flagged your loan application as fraudulent — all in under 200 milliseconds. Yet without it, the fintech app you trust would crumble in an afternoon. This is the world of B2B middleware infrastructure: the unsexy, unglamorous, and almost impossibly sticky layer that holds India's digital economy together. No consumer brand. N
Rushi Joshi
Apr 235 min read
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