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Nicolas-Pedernera/README.md

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Nicolás Pedernera — Backend, sistemas en tiempo real e ingeniería blockchain

ZendX LinkedIn Portfolio

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Nicolás Pedernera

Backend / Automation / AI / Blockchain Engineering

Systems Engineer (Universidad de Buenos Aires, 2024). Founder & CEO of ZendX — a fintech platform combining P2P lending, trading/exchange, prediction markets, a card product, and a custom Layer 1 blockchain.

I work across the full stack of a real fintech product: backend APIs, real-time data infrastructure, PostgreSQL persistence, and Solidity smart contracts running on our own EVM-compatible chain.

What I work on

  • Backend & APIs — Node.js, TypeScript, Fastify, PostgreSQL
  • Real-time systems — WebSocket architectures with reconnection handling, rate limiting, and multi-client broadcast
  • Blockchain & Solidity — smart contract design with a security-first mindset (Checks-Effects-Interactions, reentrancy guards, access control)
  • AI-assisted engineering — using AI coding tools daily, always with deliberate review rather than blind acceptance

Tech stack

Iconos del stack técnico

Featured projects

Proyecto Descripción
order-matching-engine Order book de límite con matching por prioridad precio-tiempo, construido desde cero — órdenes market/limit, fills parciales, recorrido del book multi-nivel y cancelación, con 24 tests cubriendo los edge cases que rompen implementaciones ingenuas.
realtime-sync-engine Capa de sincronización de datos en tiempo real: reconexión con backoff exponencial, broadcast throttled por clave, y fan-out multi-cliente. Incluye un dashboard en vivo conectado a un feed de precios real de un exchange.
defi-vault-contracts Vault de staking en Solidity construida para demostrar patrones de seguridad reales — orden CEI, un reentrancy guard, y una suite de tests que efectivamente ataca el contrato para probar que el guard funciona.
realtime-dashboard Frontend en Next.js que consume el backend de tiempo real de arriba, con su propia lógica de reconexión independiente del lado del cliente.
ai-workflow-backend Backend orientado a producción para orquestación de workflows de IA — persistencia en PostgreSQL, migraciones versionadas, y registro on-chain de workflows vía un contrato Solidity.
zendx-chain Devnet de ZendX Chain — una cadena PoW abierta con modelo UTXO. Código de consenso, P2P y wallet, espejado públicamente para operadores de nodo externos.

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  1. ai-workflow-backend ai-workflow-backend Public

    AI-assisted liquidation risk engine for leveraged trading positions — deterministic financial math, local AI (Ollama), and on-chain audit trail

    TypeScript 1

  2. defi-vault-contracts defi-vault-contracts Public

    Solidity smart contracts for a staking vault — deposit/withdraw logic, security-focused design, and comprehensive Hardhat test coverage.

    TypeScript 1

  3. realtime-dashboard realtime-dashboard Public

    Next.js dashboard consuming a real-time WebSocket backend — live data visualization with a deployed demo.

    TypeScript 1

  4. realtime-sync-engine realtime-sync-engine Public

    Real-time data synchronization engine with WebSockets — reconnection handling, rate limiting, and multi-client broadcast, built on Node.js and TypeScript.

    TypeScript 1

  5. zendx-chain zendx-chain Public

    Zend X Chain devnet — PoW abierta + UTXO, código de consenso/P2P/wallet, espejo público para operadores de nodo externos

    Rust 1

  6. order-matching-engine order-matching-engine Public

    Limit order book with price-time priority matching — market/limit orders, partial fills, multi-level book walking, and cancellation, built from scratch in TypeScript.

    TypeScript 1