Ricardo Castelló

I’ve spent five years building DeFi and payments infrastructure on Solana, owning products end-to-end from on-chain programs to production frontends. For Jupiter, I helped build Telegram bots from their foundation to 14k users and $3.8M in volume, shipping prediction markets, copy trading, gasless transactions, Privy wallets, and referrals. I’ve also built transaction infrastructure for frnx.ai across swaps, staking, subscriptions, and Blinks. My work includes Solana Pay monetization and on-chain authentication for Fishnet, Solana indexers for Aleph.im, and reverse-engineering a staking protocol for Botborgs’ NFT airdrop. I also disclosed a critical Phantom Wallet transaction-simulation vulnerability that was rewarded through Bugcrowd. Today I run Brick Studio, where I build automated web platforms for Spanish local businesses, including scheduling, reminders, SEO, feeds, per-customer databases, and fleet-wide migrations. I’m looking to bring that product ownership to a remote-first team.