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soyerno/README.md

soyerno

roles

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I build products end-to-end — from React/Next.js front-ends to Node/Python back-ends — and I'm now bringing AI into production.

  • 🏦 At MODO (Argentine fintech) — building AI-powered features with real tests and guardrails.
  • 🐾 Building Firulapp — a community app for pet owners in Buenos Aires: social feed + AI-powered Lost & Found. Next.js 16, React 19, Firebase, hexagonal architecture.
  • 📚 14+ years shipping software. TDD, clean architecture, and pragmatism over perfection.

🛠️ Tech

TypeScript JavaScript Python React Next.js Angular Tailwind CSS Node.js NestJS Firebase LLMs · MCP · Agents Git

🤖 AI Engineering

Capabilities I build with LLMs (framed as reusable skills — no proprietary detail):

  • LLM agents & tool use — agents that call tools reliably, with structured outputs.
  • MCP servers — exposing application capabilities to AI assistants via the Model Context Protocol.
  • RAG — retrieval-augmented generation grounded on domain data.
  • Prompt engineering & evals — versioned prompts, structured outputs, automated evaluation.
  • AI safety & guardrails — prompt-injection defenses, access control on AI surfaces, output validation, and parity checks that keep AI features in sync with the product.

📌 Featured & repos of interest

  • 🐾 Firulapp — Pet community + AI Lost & Found · Next.js · Firebase · LLM agents
  • 🧰 nestjs-api-tools — NestJS toolkit with a TOON interceptor that cuts LLM token usage 30–60% vs JSON
  • 💳 stripe-plans-importer-nodejs — Programmatically import Stripe plans in Node.js
  • 🛒 tiendarapida — MVP de tienda online self-hosteable · catálogo en Google Sheets + pago con MercadoPago/MODO · Next.js
  • 🧪 monopoly-tdd — Test-driven domain modeling in TypeScript (Jest)
  • 🎯 valorolette — Valorant agent/map roulette · React + Sass (fan project, just for fun)

📊 GitHub

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GitHub streak


Open to interesting problems in AI engineering & full-stack product work.

Popular repositories Loading

  1. stripe-plans-importer-nodejs stripe-plans-importer-nodejs Public

    Importá planes de Stripe en masa desde un CSV con Node.js.

    TypeScript 4 1

  2. Atlantis Atlantis Public

    🔱 Atlantis — the orchestrator-city of agents for Claude Code. One petition → expert Artisans (parallel, isolated) → Guardians audit → the three Judges weigh each blocker → one Decree. Config-driven…

    JavaScript 3

  3. soyerno soyerno Public

    1

  4. nestjs-toon nestjs-toon Public

    Serializá las respuestas de tu API NestJS al formato TOON y ahorrá 30-60% de tokens en LLMs. Interceptor + decorators de Swagger.

    HTML 1

  5. soyerno.github.io soyerno.github.io Public

    Mi sitio personal — soyerno.github.io. HTML+CSS vanilla, accesible, SEO-optimizado.

    HTML

  6. valorolette valorolette Public

    🎯 Ruleta estilo tragamonedas para Valorant — sortea agente o mapa al azar. React + Sass.

    TypeScript