const jhon = {
  role:       "Senior Blockchain Engineer & Stablecoin Architect",
  location:   "Colombia 🇨🇴 — Open to remote worldwide",
  experience: "9+ years building production-grade financial systems",

  highlight:  "Architected COPW — COP-pegged stablecoin on Polygon for Bancolombia Group",

  blockchain: ["Solidity", "EVM", "OpenZeppelin Upgradeable", "Hardhat", "ethers.js",
               "Solana/Rust", "Anchor", "Fireblocks", "Chainlink PoR",
               "Stablecoin Architecture", "KYC/AML"],

  backend:    ["Python", "FastAPI", "Django", "Go", "Java",
               "LangChain", "OpenAI API", "RAG"],

  mobile:     ["Flutter", "Dart", "Clean Architecture", "Bloc", "GoRouter"],

  cloud:      ["AWS", "Terraform", "Docker", "Kafka", "SQS",
               "CI/CD", "GitHub Actions"],

  currently:  "Building full stack products @ Auxo (Flutter + Django + Next.js)",
  looking_for: "Remote roles in Web3 · DeFi · Fintech · AI-powered products",
};

Production experience: 🪙 COPW Stablecoin (Polygon mainnet) — architected the COP-pegged stablecoin for Wenia/Bancolombia Group (Colombia's largest bank). Upgradeable ERC-20 (OZ proxy pattern), Chainlink Proof of Reserve integrated in mint function as on-chain circuit breaker, OZ Defender Sentinels for custody, COPW/USDC pair with Circle, Alchemy RPC. Audited & verified by OpenZeppelin. — View on Polygonscan

🔗 Chainlink PoR — integrated as on-chain circuit breaker in COPW mint function (Polygon mainnet, production) 🔐 Fireblocks — institutional custody integration at Wenia & B2Fintech (Policy Engine, Wallets-as-a-Service, Tokenization Engine) 🔵 Circle / USDC — COPW/USDC trading pair integration for stablecoin liquidity 💳 Pomelo — Mastercard/Visa card issuance & management 📈 AlphaPoint — exchange & liquidity rail for crypto-fiat operations 🔒 OZ Defender Sentinels — automated wallet custody monitoring & on-chain automation 🔔 Notabene — Travel Rule compliance (VASP-to-VASP) ✅ KYC/AML — end-to-end compliance flows for regulated crypto apps ⚡ Lightning Network — Bitcoin payment integrations at Kumuly 📊 The Graph — on-chain data indexing & subgraph deployment

Clean Architecture · Bloc · GoRouter · Dio · GetIt · Dartz · 4+ years in production

COP-pegged stablecoin deployed on Polygon mainnet for Colombia's largest bank. OpenZeppelin upgradeable contracts (proxy pattern), Chainlink Proof of Reserve in mint function as on-chain circuit breaker against infinite mint attacks, OZ Defender Sentinels for automated custody, COPW/USDC pair with Circle, Alchemy RPC. Audited & verified by OpenZeppelin.

🔗 View contract on Polygonscan · Fireblocks case study

PaloPunks — fully on-chain generative NFT collection. ERC-721 with DNA-based trait engine, ERC-2981 royalties, on-chain Base64 metadata. 80 tests · TypeScript · Hardhat · OpenZeppelin

First steps with Solidity smart contracts using Hardhat. EVM deployment, ABI interaction and testing basics.

Production-ready Flutter app · CRUD users · Clean Architecture + Feature-First · Bloc · GoRouter · Dio · Dartz. 132 tests · 85% coverage · 0 failing

Docker Swarm orchestration with Terraform IaC. Multi-service infrastructure reproducible across environments.

  

• 🪙 Architecting a COP-pegged stablecoin on Polygon — decisions behind COPW
• 🔐 Integrating Fireblocks custody in a Flutter app — what nobody tells you
• ⚡ From Solidity to Rust/Anchor: my transition to Solana development
• 📊 Indexing DeFi data with The Graph — a practical guide
• 🤖 Building a RAG pipeline with LangChain + FastAPI