Leonardo Rocha

AI/ML Engineer with 12+ years in Data Science and 5+ years building and deploying intelligent systems.

Specialized in Graph ML, NLP, and Generative AI — including Agents and RAG architectures.

A hands-on engineer with entrepreneurial vision, leadership experience, and a proven ability to transform state-of-the-art AI into scalable real-world systems.

Key Highlights

AI Robotic Agent — Attorney General’s Office of Ceará
95%+ success rate · 40% workload reduction · 400+ hours/month saved

Led the full-cycle design and deployment of an AI-powered robotic agent automating legal workflows across 10,000+ monthly cases in a region of 9M inhabitants. Combined LLMs, rule engines, and RPA for decision automation, achieving >95% success rate according to human validation.

Adaptive Learning Platform — IREDE Institute
5,000+ students · R$5M annual R&D · 95% success rate

Designed and implemented adaptive learning and recommendation engines using semantic embeddings and graph-based modeling, powering a national ICT training platform and improving learner engagement and completion rates.

AI Startup Mentor — Multi-Agent Conversational Intelligence
4 expert personas · LangGraph orchestration · RAG-grounded reasoning

Built a multi-agent conversational platform that simulates expert panels (CTO, PM, VC) to mentor startup founders. Agents collaborate through LangGraph orchestration and RAG-based contextual grounding, ensuring coherent, knowledge-driven dialogue. Deployed with FastAPI and Google Cloud Run for scalable interaction.

Moena.ai — Reinforcement Learning for Fintech Personalization
Consulting · Florida, USA

Advised a US fintech startup on RL-based customer personalization and infrastructure design. Modeled uplift-optimization strategies and evaluated cost–benefit scenarios for integration with Stone and C6 Bank in Brazil.

Malicious Site Detection via Graph ML
93% detection accuracy · Graph Neural Networks architecture

Developed an intelligent cybersecurity module using graph-based machine learning to detect malicious websites through relational analysis of URLs, domains, and host networks. Results were peer-reviewed and published at the 37th International Conference on Advanced Information Networking and Applications (AINA 2023).

SofIA Tech — Academic Spin-off and AI Consulting
Founder · Applied AI Training and Solutions

Founded SofIA Tech, bridging state-of-the-art AI research with market applications through consulting, automation projects, and enterprise AI training. Delivered multiple solutions using LLMs, RAG, and intelligent automation frameworks.

LAGIC & IncubaUECE — AI Research and Innovation Ecosystem
20+ supervised projects · 30+ startups supported

Founded the Graph and Computational Intelligence Lab (LAGIC) and coordinated the IncubaUECE incubator, fostering applied AI research, technology transfer, and entrepreneurship in deep-tech ventures across Ceará.

About

Machine Learning Engineer specialized in Graph ML, LLM agents, embeddings, Retrieval-Augmented Generation (RAG), and automation of real-world workflows. Proven ability to lead projects that deliver measurable efficiency gains with startup-level execution.

Experience

Machine Learning Engineer — Attorney General's Office of Ceará
Nov 2023 — Present · Ceará, Brazil

Led design and deployment of an AI-powered robotic agent automating legal workflows. Achieved >90% accuracy in key tasks, 98.7% dispatch approval without human revision, and >40% productivity gains.

Consultant – AI Research Engineer — Moena.ai
Mar 2025 — Jul 2025 · Remote, Florida, USA

Advised on reinforcement learning system for customer personalization. Defined technical architecture, mapped requirements, and evaluated infrastructure, costs, and risks to inform product roadmap decisions.

R&D Engineer — IREDE Institute
Sep 2022 — Mar 2024 · Ceará, Brazil

Led design and implementation of adaptive learning features for a national ICT training platform (5,000+ students). Built recommendation engine with 95% success rate in human-supervised evaluations.

Associate Professor — State University of Ceará
May 2013 — Present · Ceará, Brazil

Lead R&D in Data Science and AI. Supervised 20+ projects, published 20+ peer-reviewed papers, coordinated IncubaUECE, and founded the Graph and Computational Intelligence Lab (LAGIC).

Skills

AI & ML
TransformersNLP Graph MLRAGLLM Agents
Technologies
PythonPyTorchScikit-learn PandasNumPyTransformers FAISSChromaDBNeo4j CypherSQL
Platforms & Tools
OpenAI APIGemini APILangChain LangGraphAWS (SageMaker, Lambda, Bedrock, S3) GCP (Vertex AI)DockerGit CI/CDFlaskFastAPI Linux

Education

PhD, Computer Science — University of Nice Sophia Antipolis, France
2009 — 2012
Master, Computer Science — Federal University of Ceará, Brazil
2007 — 2009
Bachelor, Computer Science — Federal University of Ceará, Brazil
2003 — 2006

Get in Touch

Prefer email? Reach me directly.

lsampaiorocha [at] gmail [dot] com