# Juan User

Juan User is a remote worker on Himalayas, AI Engineer & Tech Lead at GX Advogados, based in Brazil.

Source: https://himalayas.app/@juanuser18

```text
AI Engineer at GX Advogados building production LLM systems, including legal triage, a cited RAG assistant, and an autonomous court agent.
```

| Detail | Value |
| --- | --- |
| Availability | Looking for a job |
| Location | Brazil |
| Authorized to work in | Brazil |
| Salary expectations | 86k+ BRL |
| Job categories | AI Engineer, Software Engineer, Integration Analyst |
| Skills | LLM Systems, AI Agents, RAG, LangGraph, Lang Chain, Python, Structured Output, LLM Evaluation, Human In The Loop, Prompt Engineering, Embeddings, Hybrid Search, Reranking, Vector Databases, PostgreSQL |
| LinkedIn | https://linkedin.com/in/juan-milheiro-b95a8631b |

## About

```text
At GX Advogados, I’m the sole technical owner and Tech Lead of an AI-driven legal platform used daily by lawyers. I designed and built GX Portal AI, which classifies official court gazette publications with structured LLM output and lets the legal team confirm decisions in one click.

I built the firm’s legal RAG assistant to ground answers in pleadings, rulings, and case documents, with source citations. I orchestrated retrieval and review flows with LangChain and LangGraph, and changes pass evaluation against the firm’s expert-labeled ground truth before production.

I also built the PJe Agent, which authenticates to the labor court portal with a digital certificate and 2FA, collects case updates, and uses an LLM to summarize and rank their severity. The platform combines LLM interpretation with deterministic deadline calculation, and includes human review, audit trails, and security controls validated by a pentest.

At Globality IT Consulting, I maintained enterprise API integrations with a security focus and automated log analysis and incident triage routines in Python, including LLM-based ticket-classification prototypes. My work also spans production SaaS and internal systems, application security, and full-stack platforms.
```

## Experience

### AI Engineer & Tech Lead (current)

GX Advogados. Sep 2025 - Present

```text
Designed and built the GX Portal AI, a triage pipeline for court gazette publications with structured output and human review. Built legal RAG with pgvector and hybrid search, orchestrated multi-step flows with LangGraph, and architected a hybrid LLM + rules design for deadline computation.
```

Skills: Python, LLM, Structured-Output, JSON-schema, RAG, Pgvector, Lang-Chain, LangGraph, Human-In-The-Loop, Evals, PostgreSQL, fastAPI, React, PWA, React-Native, RBAC, Row-level-security, mTLS, Google-Workspace-APIs, Trello

### Developer / Integration Analyst

Globality IT Consulting. Jul 2024 - Jun 2026

```text
Maintained enterprise API integrations with a security focus, including mTLS gateways and B2B/B2C credentials on IBM DataPower. Automated log analysis and incident triage routines in Python, including LLM-based ticket classification prototypes.
```

Skills: Python, IBM-DataPower, mTLS, API-Integration, Microservices, Incident-Response, LLM, Automation

## Education

### Praxis

AI Engineering Residency, AI Engineering. 2026 - Present

```text
AI Engineering Residency in progress, focusing on AI agents in production, RAG, and evals using LangChain and LangGraph.
```

### UNOPAR

Bachelor of Science, Software Engineering. 2024 - Present

```text
Pursuing a Bachelor of Science in Software Engineering at UNOPAR from 2024 to 2027.
```

### Cisco Networking Academy

Networking Basics, Networking. 2026 - 2026

```text
Completed Networking Basics course in 2026.
```

## Tech stack

- Postman
- React Native
- Expo
- MySQL
- PostgreSQL
- Node.js
- React
- Python
- FastAPI
- Serverless
- Vercel
- TypeScript
- Git
- ServiceNow
- Burp Suite
- Supabase
- Qdrant
- LangChain
- Playwright
- OpenAI API
- pgvector
- LangGraph
- Retrieval-Augmented Generation (RAG)

To contact Juan, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire).

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