Maximilian Roos
Quantitative Trading
Irvine, California, United States
Summary
🤩
Rockstar🎓
Top SchoolMaximilian Roos is a quantitative trading professional and software developer with 11 years of experience blending systematic investing and open-source engineering from Irvine, CA. He founded and ran Sixty Capital, a market‑neutral equities hedge fund that raised a $150M IMA after delivering a 1.8 Sharpe track record, and now applies that rigor to quantitative trading since 2020. Technically adept across Python and Rust ecosystems, he contributes to high-profile projects like pandas, xarray, dbt-bigquery and the PRQL query language, emphasizing parsers, BigQuery integrations, and data reliability. His open-source work spans core library fixes, parser implementation, and test/CI improvements—demonstrating both deep numerical/data expertise and practical software hygiene. An MBA Baker Scholar from Harvard with prior senior roles at Bridgewater and BCG, he combines investment strategy, production-grade engineering, and a penchant for thoughtful tooling (creator of prql and several utility packages).
11 years of coding experience
5 years of employment as a software developer
Eton CollegeBSc, Management Sciences, BSc, Management Sciences at London School of Economics and Political ScienceMBA, George F. Baker Scholar, MBA, George F. Baker Scholar at Harvard Business School
Stackoverflow
7,970reputation
1.2mreached
95answers
82questions
environment-variables
top-5%
shell
top-5%
python
top-5%
Github Skills (66)
google-cloud-platform10
python10
testing10
gcp10
numerics10
lexical-analysis10
linting10
scientific-computing10
google-bigquery10
zip-archive10
data-engineering10
pandas10
formatter10
zip10
numpy10
Programming languages (29)
Github contributions (5)
PRQL/prql
Jan 2022 - Jan 2023
PRQL is a modern language for transforming data — a simple, powerful, pipelined SQL replacement
Role in this project:
Back-end Developer
Back-end DeveloperContributions:45 releases, 1528 reviews, 837 commits in 1 year
Contributions summary:Maximilian is primarily focused on developing the parsing functionality for the PRQL language. Their contributions revolve around implementing a parser, handling expression parsing, and integrating features like nested parentheses and comments. They have been involved in refactoring and improving the parser's capabilities by transitioning from one parsing library to another. These changes indicate a focus on enhancing the language's core functionality and expressiveness.
datapipelineprqlmarkup-languagesql
pydata/xarray
Nov 2015 - Oct 2022
N-D labeled arrays and datasets in Python
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 releases, 816 reviews, 275 commits in 7 years
Contributions summary:Maximilian primarily focused on improving the xarray library's internal workings. Their contributions involved setting data types for specific scenarios, enhancing the display of coordinates, and refactoring code to accommodate changes to the Dataset and DataArray constructors. They also implemented a new method for rolling exponentially-weighted sums, and ensured the existing methods correctly handled all available features. These changes suggest a developer deeply involved in the library's core functionality and performance optimizations.
pythonnetcdfnumpydaskarrays
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