Backend & Cloud
I've built delivery routing for 400+ stores and checkout systems that survive Black Friday. Node.js, AWS, Kubernetes—whatever keeps things running at 3am without paging me.
Node.js AWS Microservices Kubernetes
Juan Osorio · Software & AI Engineer · Building in Public
I build software
that actually ships.
10+ years designing backend systems, AI platforms & products. From Colombia to global scale.
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Expertise
What I Do
Three things I'm deeply obsessed with.
AI & LLMs
Built VTEX's Copilot from scratch—RAG pipelines, multi-agent orchestration, the works. My rule: AI that answers real questions, not confidently hallucinates.
Python LLMs RAG Multi-Agent
Shipping Side Projects
Appcitas has been live since 2015. WalioAI is my 2026 bet. I've shipped more flops than wins—but every failure taught me something I couldn't learn otherwise.
Appcitas WalioAI SaaS Indie
Projects
Stuff That's Actually Live
Products people pay for. Not prototypes.
2026
WalioAI
My 2026 bet. Pay per qualified lead. Your AI agent responds, qualifies, and emails you when they're ready to close.
Next.js Supabase LangChain LangGraph
Wife's project :)
Arquisara
Built my wife's site. 60k followers, 97+ Lighthouse. She's the architect, I'm the engineer.
Next.js React Tailwind Framer Motion
10 years
Appcitas
10 years old. Still running. An AI agent books your appointments via WhatsApp.
Node.js AWS Lambda OpenAI PostgreSQL
Blog
What I'm Learning
Technical deep-dives. No fluff, no hot takes.
· 5 min read
Your AI Coding Agent Has Amnesia. Here's the Fix.
Every new session with Claude Code, Cursor, or Windsurf starts from zero. Agent OS solves the memory architecture problem by capturing your team's conventions as injectable context.
EN AI Claude Code
· 5 min read
How I Built a Copilot AI at VTEX: RAG, Multi-Agent, and What I Learned
The real story of building an AI copilot for enterprise e-commerce — from a third-party chatbot that couldn't handle B2B complexity to a custom RAG system with reranking and multi-agent orchestration.
EN AI RAG