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Rafael R PhD
@rafreis
Top Rated
Data is the new oil!
Brasil
Inglés
Sobre mí
Hi, I’m Rafael—a data scientist, researcher and professor with 10+ years of experience turning complex data into clear insights. I hold a PhD from the University of Leeds and have partnered with researchers, NGOs and businesses to solve real-world challenges using R, SPSS and Python, from statistical modelling and machine learning to experimental design. As author of 16 peer-reviewed papers, I guarantee methodological rigor, reproducibility and actionable results. Let’s connect and drive your project forward!
Habilidades
Rafael R PhD
USD 50/hora
desconectado •
Tiempo medio de respuesta: 1 hora
Revisa mis servicios
Modelado estadístico y análisis
I will perform statistical data analysis with spss, r, or python
Aprendizaje automático
I will build and evaluate a machine learning model in python or r
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Experiencia laboral
Unlisted
Tiempo parcial • 4 yrs 5 mos
Professor of Data Science
Aug 2022 - Dec 2023 • 1 yr 4 mos
Company: Sirius Education Taught data science and quantitative methods remotely — statistics, R/Python and applied analytics.
Data Scientist
Mar 2020 - Apr 2023 • 3 yrs 1 mo
Company: SENAI (National Service for Industrial Training) Built COVID-19 case-forecasting models powering a public-health decision dashboard (Monitora-Covid19). Designed a survey and a predictive infection-risk model to optimize PCR testing via risk-based sample pooling, reducing reagent use on low-probability cases. Delivered analytics and visualizations to support data-driven public-health decisions.
Doctoral Researcher (PhD)
Leeds • Tiempo completo
May 2016 - Dec 2019 • 3 yrs 7 mos
Company: Leeds Institute for Data Analytics PhD research on behaviour change and sustainable mobility (EMPOWER, EU Horizon 2020). Designed and analyzed a large-scale survey (920 respondents), applied behavioural-science theory (Theory of Planned Behaviour, Norm-Activation Model) and psychographic segmentation (cluster + discriminant analysis), and modeled determinants of travel behaviour. Published peer-reviewed work; conducted thesis analytics within the Leeds Institute for Data Analytics (LIDA).
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The statistical data analysis was conducted successfully and produced clear, reliable results. The data was carefully organized and analyzed using appropriate statistical methods, allowing meaningful patterns and trends to be identified. The findings supported the objectives of the study and were presented...
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achievingskills
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I had a very positive experience working with Rafael on a methodological review of our grant Letter of Inquiry. His professionalism was evident throughout the entire process—communication was clear, expectations were well-defined, and he approached the work with a high level of integrity and respect...
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Rafael was exceptional to work with. He thoroughly reviewed our exercise physiology research study, verified our linear mixed-effects models in R, checked our statistical assumptions, and helped ensure every analysis was both rigorous and reproducible. He caught important details, explained his reasoning...
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Rafael delivered agency-level statistical analysis! He expertly navigated complex data structures for my master's thesis, applied the exact models my methodology required, and wrote up the results beautifully in strict APA 7th format. Fast delivery, excellent communication, and outstanding technical skill. I cannot recommend him enough!
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amazing ! very professional , highly skilled and has a deep understanding of the topics to deliver high standard services . he is also fast to respond and committed to deliver on the agreed date of delivery . thank you
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