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Senior Product Engineer, Web3

I build the product layer around blockchain systems: wallets, trading interfaces, token flows, indexers, and the services that sit between a chain and the person using it. 15+ years across EVM networks and Antelope. Fluent in English, Spanish, Portuguese, and Italian.

Highlights

  • 12+ years building 0→1 products for startups and growth-stage teams
  • Led engineering for Wink, Costa Rica's first neobank, from architecture to launch
  • Built wallets, bridges, auctions, and trading interfaces across EVM, Arbitrum, Polygon, and Antelope
  • Developed onchain indexers with Ponder, Moralis streams, and custom WebSocket subscriptions

Experience

Product Engineer, Bitlauncher

Remote • Full-time • Nov 2023 – Nov 2025

Helped take Bitlauncher from concept through delivery, owning product direction, technical decisions, and hands-on implementation.

  • Owned product and technical direction for the launchpad from concept through delivery.
  • Built bridge flows for USDT, USDC, and BITUSD into protocol tokens.
  • Integrated Gnosis auction contracts with wallet UX and realtime balance updates.
  • Built a custom EVM indexer using WebSocket event subscriptions.

Software Engineer, Opyn

Remote • Contract • Oct 2024 – Feb 2025

Options protocol on Arbitrum with a trading interface and indexed onchain data.

  • Built the Next.js 14 trading interface with React Server Components.
  • Integrated the protocol and Arbitrum testnet with viem and wagmi.
  • Indexed onchain data with Ponder, PostgreSQL, and Supabase.

Software Engineer, ZTX

Remote • Full-time • Aug 2022 – Aug 2023

Virtual world with a WebGL wallet connection and a Next.js experience.

  • Built a WebGL EVM wallet connector with Ethers.js and a custom JavaScript event system.
  • Set up the Next.js app that hosted the virtual world, with Tailwind and Framer Motion.
  • Wired signing and NFT trading so the wallet session lived inside WebGL.

Software Engineer, RareMint

Remote • Full-time • Jul 2021 – Dec 2022

Polygon marketplace for tokenized sports collectibles with indexed NFT data, auctions, and WalletConnect.

  • Built an NFT indexer with Moralis streams, Node.js, and PostgreSQL.
  • Refactored the marketplace with Next.js SSR, Tailwind CSS, and GraphQL.
  • Integrated WalletConnect and supported the first Pokémon card auctions on Polygon.

Lead Engineer, Bitcash

Remote • Part-time • Jan 2020 – Jul 2021

Fiat-to-stablecoin and crypto exchange with peer-to-peer trading, chat, and browser signing.

  • Built the React, Vite, Node.js, PostgreSQL, Hasura, and Google Cloud stack.
  • Built the peer-to-peer exchange, realtime chat, and matching engine.
  • Built a realtime EOS indexer with Node.js worker threads, binary deserialization, and PostgreSQL.
  • Built WebAuthn key management for in-browser transaction signing without an external wallet.

Additional experience

In 2025 I built an AI legal assistant at LegalAgent with voice, chat, and retrieval. Earlier chain work includes EOS Costa Rica (2018–2020), through the EOS mainnet launch and a private-chain MVP for Grant Thornton Labs; Emanate (2019–2020), integrating EOS with AWS; and Knowledge (2017–2018), an ERC-20 token, marketplace, and wallet dashboard. Alongside Bitcash I created ChainGraph, an open-source GraphQL toolkit for indexing Antelope chains. I led engineering at Wink (2015–2018), led frontend for AMC Networks (2012–2014), and built card marketing products at American Express (2010–2012).

Skills

  • Web3: EVM, Ethereum, Arbitrum, Polygon, Solidity, Foundry, Hardhat, Viem, Wagmi, Ethers, Ponder, WalletConnect, EOSIO, IPFS
  • Languages: TypeScript, JavaScript, Solidity, SQL
  • Frontend: React, Next.js, React Native, Tailwind, shadcn/ui
  • Backend: Node.js, PostgreSQL, Supabase, Hasura GraphQL, Redis
  • Cloud & Infra: AWS, GCP, Vercel, Docker, Alchemy, Trigger.dev

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