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Rafael R PhD
@rafreis
Top Rated
Data is the new oil!
Brazil
English
About me
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!
Skills
Rafael R PhD
$50/hour
Offline •
Average response time: 4 hours
See my services
Statistical Modeling & Analytics
I will perform statistical data analysis with spss, r, or python
Machine Learning
I will build and evaluate a machine learning model in python or r
Want to work on an hourly basis?
Tell Rafael R PhD what you need.
$50
/
hourPortfolio
Work experience
Unlisted
Part-time • 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 • Full-time
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).
298 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 298 Reviews
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infiniteincorp
United States
Ongoing collaboration
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...
Helpful?
cispediatrics
United States
Rafael exceeded my expectations, was timely, and answered all of my questions thoroughly. He has a deep understanding of statistics and thought of all details to make sure my project was in line with current science.
Helpful?
sarahnasser99
United Arab Emirates
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
Helpful?
joabe_barbosa
United States
Rafa is incredible! Fully recommend him, he is excellent at what he does! He helped me, answered questions and made me understand exactly what he did. He uses jargon, but explains exactly what he means and he guides you through everything so well!
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infiniteincorp
United States
Ongoing collaboration
Rafael was top notch with his professionalism and expertise. He was able to quickly produce the statistics for our research group's study with exceptional and comprehensive quality.
Helpful?
