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Kevin TakanoKT
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Kevin Takano

@kevintakano

Senior Machine Learning Engineer at QuintoAndar building LLM evaluation workflows that improved classification quality by 10%.

Brazil
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At QuintoAndar, I built a production LLM evaluation workflow for rent inspections and a feedback loop that improved classification quality by 10%. I also created multi-step conversation scoring pipelines that raised agentic workflow quality scores from 0.48 to 0.90.

As an independent AI/ML Engineer and Data Scientist, I built a medical appointment FAQ agent that improved response quality and cut latency in half, along with a CatBoost conversion model that reduced costs by 50%. Earlier, I led an embedding recommender system at Hotmart that increased click conversion to 8.6% and drove 3.8x more purchases.

Experience

Work history, roles, and key accomplishments

QuintoAndar logoQU
Current

Senior Machine Learning Engineer

May 2025 - Present (1 year 6 months)

Built a production LLM evaluation workflow for rent inspections and an LLM-as-judge feedback loop that improved classification quality by 10%. Analyzed internal AI-agent architecture and built multi-step conversation scoring pipelines, improving quality score from 0.48 to 0.90.

Nubank logoNU

Machine Learning Engineer | Data Scientist

May 2024 - May 2025 (1 year)

Built a Scala and Spark calibration model for credit-card interest-rate prediction, reducing incorrect predictions by 80%. Improved engineering velocity with reusable libraries, unit tests, and faster CI/CD, and connected model behavior to business outcomes through automated reporting pipelines.

Hotmart logoHO

Machine Learning Engineer | Data Scientist

Hotmart

Apr 2022 - May 2024 (2 years 1 month)

Led an end-to-end embedding recommender system on SageMaker and Kubernetes, increasing click conversion to 8.6% versus a 2.07% baseline and driving 3.8x more purchases. Built a treasury forecasting system for PIX and billet payments that reduced error by 5% and re-architected chatbot context and document-processing flows.

SA

Back-End Software Engineer

SIDIA - Samsung Instituto de P&D da Amazonia

Jan 2016 - Jan 2018 (2 years)

Developed Java, C++, and Node.js components for Android and Ginga middleware, plus CI and test automation that cut test runtime from hours to seconds and reduced library size by 50%.

Education

Degrees, certifications, and relevant coursework

Universidade Federal do Amazonas logoUA

Universidade Federal do Amazonas

Master's in Informatics, Informatics

2019 - 2022

Master's in Informatics with a focus on Machine Learning, completed in 2022.

Universidade Federal do Amazonas logoUA

Universidade Federal do Amazonas

Bachelor of Computer Science, Computer Science

2012 - 2016

Bachelor of Computer Science, completed in 2016.

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