Santanu Sarma

I'm an economics graduate — mathematical economics, econometrics, public finance. I spent years studying how money moves, how statutory interest compounds across jurisdictions, and how governments codify payment obligations into law. Most people treat that as academic. I treat it as a spec sheet.

That's how GetInvoicePDF.com got built. A fully client-side B2B invoice generator with a cross-border late fee engine that calculates legally compliant interest under US, UK, EU, and Indian frameworks — no login, no database, no subscription. Just open it and it works. It runs entirely in your browser because your invoice data is none of my business.

Vanilla JS. Tailwind CSS. Zero backend. That's a deliberate philosophy, not a limitation.

I also teach lower primary students, which turns out to be the most rigorous UX training available. When you have to explain fractions to a seven-year-old, you develop a different relationship with complexity. You stop hiding it behind jargon and start designing around how people actually think.

I build tools that treat users like adults — no paywalls for basic utility, no accounts as artificial friction, no dark patterns dressed up as features.

If you're an indie hacker, a founder who thinks software has gotten unnecessarily extractive, or an economist who ever wondered what their models look like as working code — I'd like to hear from you.

hello@getinvoicepdf.com