Raul Cumplido
Apache Arrow PMC Member at Universitat de Barcelona
Esparreguera, Catalonia, Spain
Summary
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Rockstar🎓
Top SchoolRaul Cumplido is an open-source focused software engineer and academic with 11 years of experience, currently serving as an Apache Arrow PMC member, QuantStack engineer, and Associate Professor at Universitat de Barcelona. He blends deep back-end C++ and Python expertise—evident from contributions to Apache Arrow, pyarrow, and Velox—with practical DevOps skills that improved build, Docker, and CI workflows for large data-engine projects. His work on packaging and versioning (vcpkg) and parquet-related fixes shows an emphasis on portability and cross-platform reproducibility for data systems. Raul’s career spans industry roles from release engineering at Voltron Data to senior engineering positions at YouGov and Crunch.io, plus founding a consultancy, giving him both operational and product-driven perspectives. An active ASF member and committer, he pairs academic rigor with hands-on engineering, often improving test infrastructure and documentation (including Spanish Python docs) to raise project usability. Based in Catalonia, he quietly specializes in bridging research-grade data formats and tooling with production deployment practices.
12 years of coding experience
17 years of employment as a software developer
Master's degree, Computer Science, Master's degree, Computer Science at Université Paris NanterreUPC Universitat Politècnica de Catalunya
Stackoverflow
415reputation
55kreached
10answers
1question
Github Skills (45)
docker10
c-language10
lib10
translation10
python10
sha10
testing10
cmake10
arrow-keys10
spanish10
dockers10
cicd10
parquet10
vcpkg10
package-manager10
Programming languages (23)
Github contributions (5)
python/python-docs-es
May 2019 - Oct 2022
Spanish translation of the Python documentation.
Role in this project:
Technical Writer
Technical WriterContributions:27 reviews, 125 commits, 96 PRs in 3 years 6 months
Contributions summary:Raul primarily contributed to the documentation of the `python-docs-es` repository, which involves translating the official Python documentation into Spanish. The contributions focused on updating the README, fixing links, and merging branches. The user also made modifications to the contributing guidelines and style rules, and removed references to outdated tools like Transifex. These changes indicate a focus on improving the quality and completeness of the translated documentation.
pythontranslation
apache/arrow
Apr 2022 - Jan 2023
Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics
Role in this project:Back-end Developer
Back-end DeveloperContributions:1191 reviews, 128 commits, 740 PRs in 9 months
Contributions summary:Raul primarily contributed to the pyarrow project by fixing bugs and improving the functionality of the project. They implemented fixes for data set tests related to string and binary views, and for issues with parquet file formats. The user also improved the existing test infrastructure by adding functionality like tests requiring certain environments and testing against different data types. Furthermore, they made code improvements related to C++ related functionality on the parquet library.
apache-arrowarrowparquet
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