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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: 1 hour
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).
285 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 285 Reviews
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achievingskills
United States
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...
Helpful?
vlt_dsm
Belgium
Rafael completed an order for a statistical analysis (GLMM and LMM) in 2 days that had a 4 day deadline, and provided an extensive analysis report complete with tables, effect sizes and , multiple, detailed figures and annotated code.
Helpful?
giacomo901
Repeat Client
Finland
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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halima_alhabib
Saudi Arabia
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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bridget_karthik
United States
Rafael is truly exceptional. He understood my project completely simply from reading the overview I sent him. His report was extremely clear. He is also quite supportive and open to revising things to meet the client's needs.
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