Looking for a job

João Henrique

@joohenrique2

AI Engineer at Celesta Mineração S.A. building production LLM and RAG systems, including a Semantic Bridge that reached 100% precision.

Brazil

Message

What I'm looking for

I'm looking for remote B2B contract work with worldwide time zones, building and shipping LLM-powered products.

At Celesta Mineração S.A., I built a Semantic Bridge that matches unstructured equipment manuals to structured telemetry, reaching 100% precision against a 70% regex baseline. I also developed a Data Steward Agent with grammar-constrained extraction and human review for low-confidence outputs.

At AYA Tech, I built a multimodal LLM sales agent for Match, a recruitment company, and architected a digital transformation for NAZCA. I joined as the first engineer and grew into the Technical Leader role, coordinating developers and working directly with stakeholders.

At Soap Health (now Medome), I built core components of a real-time clinical voice engine used by a platform with 20,000+ users, integrating voice processing with Electronic Health Records to automate SOAP notes. My projects include Oraculo, a multi-agent SaaS platform, and Sanvera, which reduced physician administrative time by 66%. I'm available for remote B2B contract work across worldwide time zones.

Experience

Work history, roles, and key accomplishments

Current

Technical Consultant

Current

Ievo

Jan 2025 - Present (1 year 9 months)

Took over a stalled fintech project and led a complete backend refactor for security and scalability. Built and deployed credit card payment integration with PCI-compliant infrastructure and launched v2 with real-time transaction processing and fraud monitoring.

Backend Refactoring PCI Compliance Payment Integration Real time processing Fraud Monitoring

Current

Technical Leader / Product Owner

Current

AYA Tech (Whoopee LTDA)

Feb 2024 - Present (2 years 8 months)

Built a multimodal LLM sales agent for Match, a recruitment company, handling lead qualification and automated scheduling, 16+ months in continuous production. Led 5 developers and 1 production engineer, implementing agile culture and owning the kanban board.

Lang Chain OpenAI Python fastAPI GraphQL NodeJS React AWS PostgreSQL Agile Kanban

Current

AI Operations Lead and Tech Lead

Current

Celesta Mineração S.A.

Jan 2024 - Present (2 years 9 months)

Built a proprietary Semantic Bridge matching unstructured PDF equipment manuals to structured telemetry via LLM query expansion and vector search, reaching 100% precision vs. a 70% regex baseline. Architected a Data Steward Agent using grammar-constrained decoding for zero-hallucination data extraction and deployed services on AWS.

LLM RAG Vector Search Constrained Decoding HITL Workflows AWS GraphQL CI CD Python PostgreSQL

Current

Independent Software Developer

Current

Freelancer

Mar 2021 - Present (5 years 7 months)

Worked on web, mobile and automation projects in parallel with main roles.

Web Development Mobile Development Automation

Mobile and Integration Engineer

Oppo Consultoria

Jan 2025 - Jan 2026 (1 year)

Shipped a cross-platform mobile app for mining block management, published on Google Play. Modernized legacy PHP, C# and Java systems and built real-time connectors for Senior ERP.

Flutter Java PHP C#ERP Integration Mobile Development

Machine Learning Engineer

Soap Health (now Medome)

Jul 2025 - Oct 2025 (3 months)

Built core components of a real-time clinical voice engine used by a platform with 20,000+ users in production. Integrated the voice pipeline with Electronic Health Records, automating SOAP note generation end to end.

Voice AI Whisper VAD Cloud Inference EHR Integration Python