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Achievement: Pair ExtraordinaireAchievement: QuickdrawAchievement: YOLOAchievement: Pull Sharkx3

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carrilloapps/README.md

Junior Carrillo

Tech Lead · Open Finance & Payments Expert · AI-Driven Architect
Yummy (YC S21)  ·  Ex Wompi (Bancolombia)  ·  Medellín, Colombia

Portfolio carrillo.app Substack carrilloapps LinkedIn carrilloapps X @carrilloapps Profile views

About

Tech Lead at Yummy (YC S21) — building Open Finance and Core Payments infrastructure for LATAM. 10+ years shipping payment systems at scale across banking, retail, and aviation in Colombia and Chile.

My focus: distributed systems that move real money reliably. From Colombia's first Open Banking service at Wompi, to CQRS architectures processing +150M records at Yummy, to autonomous AI agents applied to financial operations. I care about systems design, clear architecture decisions, and mentoring engineers who build for scale.

Outside of code: writing about fintech and engineering on Substack, licensed Ham Radio operator HJ4JPC, and occasional outdoors.

📬 carrilloapps.substack.com  ·  🌍 carrillo.app  ·  📫 m@carrillo.app

Experience

Company Role Impact
Yummy (YC S21) Tech Leader Billing 4d→15min (+12M invoices/Q). CQRS +150M records, reports <3s. AI agents. PCI-DSS.
Wompi (Bancolombia) Senior Full Stack First Open Banking in Colombia (Bre-B). 13M payers, 40K merchants, $50B COP/year.
Cencosud ($17.4B NRF) Developer Leader Payments & Fraud: event-driven architecture + SAP integration.
SKY Airline Sr. Engineer & Tech Lead Mobile sales ecosystem (Kotlin, Swift, RN) for +13.8M passengers/year.
Falabella ($14.7B) Mid. Backend Developer High-concurrency payment microservices. Kafka, RabbitMQ, Circuit Breaker.
Acid Labs Sr. Engineer → Tech Lead 3 years: Retail, Banking & Aviation (~$32B combined revenue).

Featured projects

  • hfo — Fullscreen TUI and headless CLI for Hugging Face GGUF models on Ollama   Stars TypeScript
  • zefer — End-to-end encrypted, zero-knowledge tool that runs entirely in your browser   Stars TypeScript
  • bcv-exchange-rate — Node.js library for BCV Venezuela and TRM Colombia exchange rates   Stars TypeScript
  • ai-sync-cli — Universal sync tool for AI coding agents and IDEs   Stars TypeScript
  • web-aprs-passcode — APRS-IS callsign passcode generator for Ham Radio operators   Stars TypeScript

Tech stack

Languages

Go, TypeScript, Python, Kotlin, Java, Swift, C#, Rust

Frameworks & runtimes

Node.js, React, Next.js, NestJS, Spring, Express, GraphQL, Tailwind CSS, Vercel, Prisma

Cloud, DevOps & messaging

AWS, GCP, Azure, Docker, Kubernetes, Terraform, Kafka, RabbitMQ, GitHub, GitLab, Grafana, Sentry

Databases

PostgreSQL, MongoDB, Redis, MySQL, DynamoDB, Cassandra, Elasticsearch

AI & Automation

Claude Claude Code OpenAI LangChain Hugging Face n8n ClickHouse

Writing on Substack

→ Ver todos los artículos en Substack

GitHub stats

Junior Carrillo GitHub contribution streak

Connect

LinkedIn GitHub skills.sh Substack X (Twitter) Bluesky Dev.to Hashnode Stack Overflow GitLab YouTube Instagram Facebook

Buy me a coffee — support Junior Carrillo

Pinned Loading

  1. GolangVE/SitioWeb GolangVE/SitioWeb Public

    Sitio web oficial de la comunidad de Golang en Venezuela

    JavaScript 6

  2. skills skills Public

    Adversarial risk gate for AI coding agents — blocks actions until you approve. Works with Copilot, Claude, Cursor, Windsurf & 40+ more.

    Shell

  3. picoclaw-dotfiles picoclaw-dotfiles Public

    🦞 PicoClaw Dotfiles — Deploy a 24/7 AI assistant on an old Android phone One-click installer.

    Shell 1

  4. zefer zefer Public

    End-to-end encrypted · Zero-knowledge · 100% in your browser

    TypeScript 1

  5. bcv-exchange-rate bcv-exchange-rate Public

    Libreria Node.js (TypeScript) para consultar tasas oficiales del BCV (Venezuela) y la TRM (Colombia)

    TypeScript

  6. hfo hfo Public

    Fullscreen TUI and headless CLI for Hugging Face GGUF models on Ollama, auto-tuned to your hardware.

    TypeScript 3