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Luiz FerreiraLF
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Luiz Ferreira

@luizferreira1

Software & AI Engineer at Capgemini building a production RAG troubleshooting solution with ~85% successful resolution within three interactions.

Brazil
Message

At Capgemini, I build and operate a Python/Django RAG troubleshooting solution for one of Latin America's largest companies. It achieves ~85% successful resolution within three interactions, with ~10% safe abstention and ~5% hallucination against available documentation.

I evolved the solution's orchestration from LangChain/LangSmith to LangGraph and its retrieval from FAISS to Vespa, applying semantic enrichment, reranking, grounding, and fallback strategies. I also design and operate AWS Bedrock workflows and investigate failures across retrieval, application, model, data, and infrastructure layers.

At Outlier, I evaluate LLM outputs for reasoning, factual accuracy, instruction adherence, and safety. Earlier, as an Administrative Agent at Prefeitura Municipal de São Sebastião do Paraíso, I supported public procurement and financial workflows by reconciling records, regulations, and source evidence.

Experience

Work history, roles, and key accomplishments

CA
Current

Digital Solutions Consultant

May 2025 - Present (1 year 5 months)

Build and operate an award-winning Python/Django RAG troubleshooting solution for one of Latin America's largest companies, achieving ~85% successful resolution within three interactions, ~10% safe abstention, and ~5% hallucination. Work in a client-facing consulting environment, translating workflows and production evidence into system requirements and architecture changes.

Outlier logoOU
Current

Evaluator

Dec 2024 - Present (1 year 10 months)

Evaluate LLM outputs across reasoning, factual accuracy, instruction adherence, and safety, producing calibrated assessments used in model benchmarking and reliability improvement. Analyze ambiguous and adversarial cases to separate factual support, reasoning validity, grounding, and instruction compliance.

PP

Administrative Agent

Prefeitura Municipal de São Sebastião do Paraíso

Sep 2020 - May 2025 (4 years 8 months)

Supported public procurement, administrative, and financial workflows by reconciling government portals, accounting records, regulations, and internal sources into actionable documentation and reporting. Improved traceability and decision support by organizing calculations, regulatory references, source evidence, and supporting documentation for time-sensitive public processes.

Education

Degrees, certifications, and relevant coursework

CU

Centro Universitário UniFatecie

Technology Degree, Systems Analysis and Development

2024 -

Pursuing a Technology Degree in Systems Analysis and Development, expected to complete in November 2026.

EG

Escola Técnica de Formação Gerencial

Technical Diploma, Business Administration

2011 - 2014

Completed a Technical Diploma in Business Administration from 2011 to 2014.

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