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Senior Backend Developer · Java/Spring Boot · Fintech · AI-assisted development
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Senior Backend Developer · Java/Spring Boot · Fintech · AI-assisted development

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sumelio/README.md

Hi, I'm Freddy Lemus 👋

Senior Full Stack Developer · Bogotá, Colombia 🇨🇴

14+ years building high-performance microservices, distributed systems, and fintech APIs for LATAM's top banking clients.


🛠️ Tech Stack

Backend Java Spring Boot Spring Cloud Node.js TypeScript

Frontend & Mobile React React Native Next.js

Cloud & DevOps AWS Docker Kubernetes Kafka

AI Tools — Daily Workflow Claude Cursor Copilot Amazon Q


🏦 Fintech Experience

Delivered backend systems for LATAM's leading financial institutions:

Client Domain
Scotiabank Colpatria Payment processing · Credit APIs
Banco Falabella Digital banking backend
PayU Payment gateway microservices
BBVA Core banking modernization
Coopeuch (Chile) Cooperative banking platform

🚀 Featured Projects

  • LeoLetras — Serverless children's literacy platform · Next.js 15 + Fastify on Lambda
  • English Trainer for Devs — AI-powered language app with 6 modules · React + Anthropic API
  • Payment Microservices — Event-driven saga pattern · Java 17 + Kafka + AWS EKS
  • Notification Engine — Multi-channel (email/SMS/push) · Node.js + Amazon Pinpoint + SQS

🤖 AI-Native Development

I integrate AI tools into every phase of the development lifecycle — not as autocomplete, but as a true engineering multiplier:

  • Architecture review and design decisions with Claude Code
  • Context-aware refactoring with Cursor AI
  • Real-time pair programming with GitHub Copilot
  • AWS-native assistance with Amazon Q Developer

📊 GitHub Stats

Freddy's GitHub stats


📫 Let's connect

Portfolio LinkedIn Email

"Clean architecture, event-driven systems, and AI-assisted delivery — that's how I ship."

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