# Renan Butkeraites

> Engineering leader with a PhD in Operations Research and 7+ years building Python backends, AI/LLM products, and decision-support systems — from mathematical model to production. PhD in Operations Research (UNIFESP/ITA, 2021); published the SIROM robust-optimization method in Expert Systems with Applications (2022) with Michel Gendreau. Based in Kennesaw, GA, working remotely worldwide.

This is a working portfolio: the demos listed below execute in your browser, so their
results are computed live rather than recorded. Every page also has a markdown twin —
append `.md` to any path.

## Interactive demos

- [SIROM](https://butkeraites.com/projects/sirom.md): A sampling-based method that hands you a Pareto frontier of robust solutions and lets you choose the trade-off after seeing the options, instead of committing to an uncertainty budget before you know what it costs.
- [Hardness](https://butkeraites.com/projects/hardness.md): A continuous, normalized robustness measure for optimization under interval uncertainty — one number in [0,1] that ranks feasible solutions by how well they resist the uncertainty around them, with an exact closed form and a Monte-Carlo estimator that agree.

## Case studies

- [The N=32 Wall](https://butkeraites.com/projects/costas-arrays.md): A verified database of Costas arrays for orders 2–100, algebraic generators built over finite fields, and CP/SAT/LP experiments against the smallest orders where nobody has ever found one — or proved none exists.

## Publications

- [A sampling-based multi-objective iterative robust optimization method for the Bandwidth Packing Problem](https://www.sciencedirect.com/science/article/abs/pii/S0957417422006947): Expert Systems with Applications, 2022
- [Forecast UTI: an application for forecasting intensive care unit beds during the COVID-19 pandemic](https://butkeraites.com/#publications): Epidemiologia e Serviços de Saúde, 2020
- [Efficient frontier of credit risk using Monte Carlo simulation](https://butkeraites.com/#publications): International Journal of Business Intelligence and Systems Engineering, 2019
- [Optimization under uncertainty: a new computational method, a new robustness measure, and applications](https://repositorio.unifesp.br/handle/11600/63626): UNIFESP, 2021

## Structured data

- [Profile as JSON](https://butkeraites.com/profile.json): identity, expertise, publications and projects with headline metrics, versioned
- [CV as markdown](https://butkeraites.com/cv.md): the full CV, unstyled
- [Full site corpus](https://butkeraites.com/llms-full.txt): every page concatenated, for single-request ingestion

## Contact

- [Email](mailto:rbritobut@gmail.com)
- [GitHub](https://github.com/butkeraites)
- [LinkedIn](https://www.linkedin.com/in/rbritobut)
- [Google Scholar](https://scholar.google.com/citations?user=Zh48TgYAAAAJ)
- [ORCID](https://orcid.org/0000-0002-5830-0466)