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ESousa97/README.md
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About

I build AI systems that solve real production problems — not prototypes.

My background is in mission-critical infrastructure: years operating 24/7 environments where systems can't fail. That foundation is what separates the way I build AI from most: I understand deployment, reliability, and observability before a model ever reaches production.

Today I focus on LLM engineering, RAG architectures, autonomous agents, and intelligent data pipelines. Every project in this profile was built to run in production, not to demonstrate that I know a framework.

Currently: Architecting an AI-powered helpdesk analytics platform processing 5,000+ support tickets — semantic classification with local LLMs (Qwen2.5 14B), predictive SLA analysis, and behavioral profiling of support patterns.


What I Build

LLM Systems & RAG Retrieval-Augmented Generation pipelines with semantic chunking, pgvector, reranking, and output quality evaluation. Built for production — not tutorials.

Autonomous Agents Multi-step agents with LangChain and LangGraph that handle real workflows: ticket triage, knowledge retrieval, incident response, and decision routing.

Intelligent Data Pipelines High-performance ETL and analytics with FastAPI, DuckDB, Polars, and PostgreSQL. Turning unstructured operational data into actionable intelligence.

AI-Augmented Infrastructure MCP Servers, observability layers, and automation tooling that integrates LLMs into existing systems without breaking what already works.


Stack

AI & Data

Python LangChain FastAPI DuckDB Polars PostgreSQL pgvector

Models & Inference

Claude Gemini OpenAI LM Studio Qwen2.5 NVIDIA RTX

Engineering

Go TypeScript Rust Next.js Docker Linux


Pinned Projects

The three projects below represent production systems, not exercises.

data-analyzer Helpdesk BI platform processing enterprise support operations. ETL pipeline with incremental sync, MTTR calculation against business hours, 5-layer SLA normalization, and statistical projections. Stack: Python · FastAPI · DuckDB · React 19 · TanStack Query.

py-rag-engine Production RAG engine with semantic chunking, pgvector persistence, and relevance evaluation. Built to serve as the retrieval backbone for AI assistants in high-volume support environments. Stack: Python · LangChain · pgvector · SQLAlchemy · pytest.

base-imc-lite Enterprise knowledge management platform with AI chatbot (GPT-4), 3-level RBAC, brute-force protection, JWT with JTI blacklist, and audit trail for 1,000+ events. Stack: Next.js · TypeScript · OpenAI · bcryptjs · jose.


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  1. bar-minimal-tools bar-minimal-tools Public

    53 - Barra de utilitários do Windows

    Rust 2

  2. py-rag-engine py-rag-engine Public

    Python