4x
Google Cloud Certifications
Machine Learning Engineer Specialist
Specialist AI & Machine Learning Engineer at Marlabs, building large-scale ML and GenAI for US healthcare Revenue Cycle Management. 4x Google Cloud Certified and 2x AWS Certified, specialized in Python, MLOps & LLMOps, RAG, and multi-agent architectures across AWS, GCP, and Azure.
Google Cloud Certifications
AWS Certifications
Professional Certifications Earned
AWS GenAI Developer Professional Early Adopter
About
I am Luis Henrique Miranda Queiroz, a Machine Learning Engineer Specialist at Marlabs, holding a Bachelor's degree in Computer Science from the Federal University of Piaui (UFPI), completed in December 2025.
My work is focused on AI systems that move from prototype to production with reliability, governance, and business value. I combine ML engineering, MLOps, and cloud architecture to deliver robust solutions in real-world environments.
Alongside industry work, I contribute to applied AI research. I took part in "Quality Interfaces for Data Science in Health" with CEREIA, FAPESP, UFC, and Grupo Hapvida NotreDame Intermedica, applying NLP to turn clinical trial reports into structured interoperability documents, and to a CNPq-funded project with the Government of Piaui on NLP for police report analysis.
Impact
Architected and implemented an intelligent matching platform using RAG, Pinecone-based hybrid search, metadata filters, and cross-encoder reranking.
Result: Faster screening cycles, improved recommendation quality, and direct contribution to roughly 50% revenue growth.
Designed a complete SageMaker pipeline with RDS ingestion, LightGBM training, versioning, GenAI explainability, and real-time endpoints.
Result: Robust production governance with drift detection and automated retraining triggers.
Built an intelligent candidate-support agent with contextual responses, scalable architecture, and full observability via Langfuse.
Result: Seamless internal integration and support for hundreds of concurrent users.
Provided technical leadership for a GenAI solution enabling intelligent queries over internal API documentation, technical flows, and business processes, on a secure and scalable Azure architecture.
Result: Significant operational efficiency gains and Top 3 recognition in an international innovation challenge.
Co-developed an LLM-powered multimodal chatbot for police incident reporting, integrated with WhatsApp and cloud infrastructure.
Result: 92.9% usefulness acceptance and ~4s average response time in user testing; evolved into BO Facil, the first WhatsApp-based police report service in Brazil.
Experience
Responsible for the architectural design, technical leadership, and implementation of Machine Learning and GenAI solutions in the healthcare domain, working directly with PracticeTek as technical reference for the initiative. The project focuses on Revenue Cycle Management (RCM), reducing claim rejections and denials through predictive modeling and intelligent automation, directly impacting financial efficiency and operational performance.
Responsible for architectural design, technical decision-making, and implementation of ML and GenAI solutions for the internal job portal and enterprise clients, leading initiatives that connected technical innovation to direct business outcomes.
Developed AI and MLOps solutions on Google Cloud Platform for internal products and enterprise clients.
Built CI/CD retraining pipelines and GenAI chatbots with RAG and function-calling patterns on GCP.
Developed Generative AI and NLP solutions to optimize management of Public Security Secretariat data, including intelligent conversational agents for automated 190 emergency service attendance.
Education
Advanced specialization covering DevOps and DataOps for ML, pipelines, model deployment, MLflow, Hugging Face, cloud ML platforms, and LLM fine-tuning and deployment in production systems.
Research activity in the CEREIA project on quality interfaces for health data science, NLP research with the Public Security Secretariat, and scholarship monitor for Digital Circuits.
Credentials
Projects
Regression pipeline for 6-week sales prediction supporting investment planning.
View repository
Classification solution to optimize retention strategies and maximize ROI.
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NLP and deep learning solution with Streamlit interface for practical inference.
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Clustering and RFM-based segmentation for e-commerce marketing prioritization.
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Recommendation engine based on user behavior and cosine similarity.
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End-to-end ML pipeline with CI/CD and cloud deployment on GCP.
View repositoryTechnical Stack
Python, Golang, SQL, FastAPI, PyTorch, TensorFlow, Scikit-Learn, LangChain, LangGraph, spaCy, NLTK, Hugging Face, Streamlit.
AWS (Bedrock, SageMaker, Lambda, RDS), GCP (Vertex AI, BigQuery, Pub/Sub, Cloud Run), Azure, Snowflake, Docker, Kubernetes, MLflow, Terraform.
Pinecone, FAISS, Elasticsearch, PostgreSQL, BigQuery, LangSmith, Langfuse, Arize Phoenix, Datadog, GitHub Actions, Bitbucket Pipelines.
LLMs, RAG, MCP, Multi-Agent Systems, Hybrid Search, Transformers, Cross-Encoders, RLHF fine-tuning, Generative AI.
Recommendation
I proposed a challenge I was almost certain he could not deliver, and he exceeded every expectation. It was a data streaming demand where he needed to put a Machine Learning model into production within a few days. He handled complex work that would normally fall to a data engineer, and still executed the entire MLOps implementation flawlessly.
He is a professional who is not intimidated by complex challenges or tight deadlines. He delivers consistent results, has an extremely short learning curve, communicates very well, and is well liked by the team.
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