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ricardodelfino/README.md

Ricardo Delfino

Product & BizOps · Payments, Stablecoins & Crypto · ex-Block (Square · Cash App · Bitkey)

I turn market complexity into shipped product. Right now I'm building bitsARK Labs, open data infrastructure for Brazil's crypto-fiat market. Free, no sign-up.

📍 São Paulo, Brazil · bitsark.com · LinkedIn · ricardo@delfino.work

🛠️ Building now: bitsARK Labs

Open data infrastructure for Brazil's crypto and FX market. I find where the market lacks clarity and ship the tools to fill the gap. Free, no auth.

$54B+ stablecoin volume tracked · R$50M+ daily FX volume · 2,000+ alerts delivered · 24 exchanges indexed · 100% free

  • DolarMap: live Android app tracking real-time USD/BRL across 13 stablecoin exchanges, with rate-move alerts. Get it on Google Play
  • Exchanges API: open, production REST feed for 24 Brazilian exchanges with fiscal and regulatory data (IN 1888, BCB PSAV, CNPJ, Lei 14.754, DeCripto). No keys, no auth. Code
  • Stablecoins in Brazil: research sizing $54B+ on-chain volume across 5+ issuers, updated weekly.
  • Stablecoin Personas: 7 user personas mapped from 29 sources.
  • Exchange Directory: 24 entities with CNPJ, tax, and Pix data, plus DeCripto tax reporting.

💼 Background

  • Block (Square, Cash App, Bitkey): Finance Strategy Manager; earlier Product Manager, Square AI. Built the financial models and pricing framework behind Bitcoin and stablecoin rails, including Square's Lightning rollout to 4M+ merchants.
  • MeuMundoFit: Co-Founder & Managing Director. Scaled two D2C businesses from zero to 5,000+ monthly orders with a 15-person team. meumundofit.com.br · atacadosuplemento.com.br
  • Banco ABC Brasil: Investment Banking Analyst, M&A.
  • Education: Insper (BBA) · Stanford GSB Ignite · Harvard CS50 (Computer Science & AI).

🧰 Stack

Python JavaScript Node.js SQL C

Astro Cloudflare AWS MySQL Google Play

Product strategy & roadmapping · analytics (SQL) · financial & unit-economics modeling · API design · AI-assisted prototyping.

🌎 Focus

Payments · stablecoins · crypto trading · market expansion across Brazil & LATAM.

🔗 Also on GitHub

  • exchanges-api: the open API powering bitsARK (JavaScript, MIT).
  • BTC21: ultra-light Chrome extensions that track Bitcoin prices in multiple currencies.
  • Harvard CS50: problem sets in C and Python.

 

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  1. harvard-cs50-2025 harvard-cs50-2025 Public

    This repository contains the solutions I developed during **CS50's Introduction to Computer Science (Harvard, 2025)**. The goal is to practice problem-solving, improve programming logic, and build …

    C 1

  2. btc21-landing btc21-landing Public

    Landing page for BTC21 - a collection of ultra-light Chrome extensions tracking Bitcoin prices in multiple currencies.

    HTML