Profile Details

Create Project

★★★★★

☆☆☆☆☆

USD 50 /hr

★★★★★

☆☆☆☆☆

Hire Ruan S.

Brazil

USD 50 /hr

Applied Mathematician (PhD student) | Data Science, Statistical Modeling, Optimization & Scientific ML

Profile Summary

Applied-mathematics researcher. Ph.D. student in Applied Mathematics (FGV/EMAp, stochastic optimization for power systems) and M.Sc. in Systems & Computing Engineering (UFRJ, generative models), working at the intersection of statistical modeling, machine learning, and large-scale data. I consult for a university applied-mathematics laboratory (LabMA/UFRJ), leading data-centric projects on a 1-billion-record database: ETL at scale, statistical and biometric (life-table) modeling for the Brazilian insurance market, and multi-engine analytical pipelines (Oracle, PostgreSQL, ClickHouse, DuckDB). My research spans modern generative models (diffusion, normalizing flows, flow matching) and stochastic optimization, with a peer-reviewed publication (CILAMCE 2024, IEEE Xplore) on diffusion-based super-resolution for physical simulation. I deliver rigorous, reproducible, well-documented work, with a technical report to go with it (LaTeX) if necessary. Fluent English (C1 certified) and Portuguese. Services: • Statistical analysis & modeling - design, estimation, validation, interpretation • Machine learning & generative models - from classical ML to diffusion and flow matching • Optimization & operations research - linear/integer/stochastic programming, optimal control, modelling in general. • Data science & engineering - ETL, large-dataset pipelines, SQL performance, reproducible code • Scientific & technical writing - reports, methods sections, literature reviews I enjoy building, constructing things that are more than "a notebook with a model". Code portfolio: github.com/Rfelip · Site: rfelip.github.io

Subject Matter Expertise

• ★ Industrial Operations Research
• ★ Machine Learning
• ★ Mathematical Optimization
• ☆ Computer Science
• ☆ Parallel Computing
• ☆ Information Technology
• ☆ Database Management
• ☆ Industrial Engineering
• ☆ Data Analysis
• ☆ Image Processing
• ☆ Computer Simulation/Computational Modeling
• ☆ Algorithm Design
• ☆ Predictive Modeling & Analytics
• ☆ Data Processing
• ☆ Data Exploration
• ☆ Data Visualization
• ☆ Big Data Analytics
• ☆ Data Management
• ☆ Data Manipulation
• ☆ Text Mining & Analytics
• ☆ Data Mining
• ☆ Data Cleaning
• ☆ Natural Language Processing
• ☆ Data Architecture
• ☆ Neural Networks
• ☆ Artificial Intelligence
• ☆ Deep Learning
• ☆ Financial Modeling
• ☆ Statistics
• ☆ Statistical Theory
• ☆ Applied Statistics
• ☆ Regression Analysis
• ☆ Multivariate Analysis
• ☆ Nonlinear Regression
• ☆ Statistical Computing
• ☆ Mathematical Statistics
• ☆ Trend Analysis
• ☆ Applied Mathematics
• ☆ Mathematical Models
• ☆ Mathematical Control Theory
• ☆ Computational Sciences
• ☆ Differential Equations
• ☆ Computational Mathematics
• ☆ Decision Science
• ☆ Risk Assessment & Actuarial Science
• ☆ Python
• ☆ SQL
• ☆ LaTex
• ☆ Scikit-learn
• ☆ Oracle
• ☆ Technical & Scientific Writing
• ☆ Manuscript & Journal Article Writing
• ☆ White Papers
• ☆ Mathematical Finance
• ☆ Data-Driven Decision Making

Services

• Writing
• Research
• Consulting
• Data & AI

Writing Technical Writing

Research Feasibility Study, Fact Checking, Scientific and Technical Research

Consulting Operations Consulting, Scientific and Technical Consulting

Data & AI Predictive Modeling, Statistical Analysis, Image Processing, Image Analysis, Algorithm Design-Non ML, Algorithm Design-ML, Data Visualization, Big Data Analytics, Text Mining & Analytics, Data Mining, Data Cleaning, Data Processing, Data Insights

Work Experience

Academic Consultant

LabMA (Applied Mathematics Laboratory), UFRJ

March 2025 - Present

Early engineer

Pluma Finance

February 2026 - April 2026

Scientific researchers

NACAD UFRJ

March 2024 - March 2025

Bee Datascience Consulting

Software Developer (Contractor)

February 2024 - November 2024

Education

Phd in Applied Mathematics (Escola de Matemática Aplicada)

Fundação Getulio Vargas

August 2025 - December 2028

M.Sc. in Systems and Computing Engineering (PESC/COPPE)

UFRJ

March 2024 - December 2026

Bacharelado in Matemática Aplicada (Instituto de Matematica)

UFRJ

March 2019 - March 2023

Certifications

• Certification details not provided.

Publications

CONFERENCE PAPER

Ruan F. S. Sousa, Roberto M. Velho, Natanael L. de Matos, Adriano M. A. Cortes, Gabriel F. Barros, Alvaro L. G. A. Coutinho (2025). Data-Driven Diffusion-Based Super-Resolution for Improvement of Reduced-Order Model Predictions in Fluid Dynamics . 2025 28th International Conference on Information Fusion (FUSION).

Bernardo F. P. Costa, Anderson O. Calixto, Ruan Felipe S. Sousa, Ricardo T. Figueiredo, Debora D. J. Penna, Lucas S. Khenayfis, Alessandra M. R. Oliveira (2025). Boundary conditions for hydrothermal operation planning problems . Proceeding Series of the Brazilian Society of Computational and Applied Mathematics.

JOURNAL ARTICLE

Adriano Cortes, Ruan Felipe de Sousa e Silva, Roberto Machado Velho, Gabriel Freguglia Barros, Fernando Alves Rochinha, Alvaro Luiz Gayoso de Azeredo Coutinho (2024). Improving accuracy of parametric surrogate model for turbidity currents using diffusion-based super-resolution . Ibero-Latin American Congress on Computational Methods in Engineering (CILAMCE).