Jacob Wujciak-jens
Senior Software Engineer at .txt
Osnabrück, Lower Saxony, Germany
Summary
🤩
Rockstar🎓
Top SchoolJacob Wujciak-jens is a Senior Software Engineer and release specialist with nine years of experience optimizing CMake-based build systems and CI/CD pipelines to accelerate developer workflows. As an elected Apache Software Foundation member and committer on Apache Arrow, he blends deep open-source stewardship with hands-on engineering—improving Arrow’s R package and cross-platform release processes. He has driven build and CI enhancements for projects like Velox and super-linter, adding multi-OS wheel builds, linting for R, and configurable dependency sources to reduce flakiness and improve reproducibility. Comfortable across C++, Python, R, Bash, GitHub Actions and Docker, he focuses on pragmatic automation that scales in complex data-engineering ecosystems. Based in Osnabrück, Germany, Jacob pairs an academic background in public health and computer science with a knack for turning build pain points into stable, documented release practices.
9 years of coding experience
5 years of employment as a software developer
Master of Education - MEd, Public Health/Computer Science, Master of Education - MEd, Public Health/Computer Science at Universität Osnabrück
German, English
Github Skills (23)
github-ci10
docker10
r-package10
scripting10
r10
bash10
cmake10
software-quality10
dockers10
cicd10
automation10
script10
build-automation10
parquet10
sh10
Programming languages (26)
Github contributions (5)
facebookincubator/velox
Oct 2022 - Dec 2022
A composable and fully extensible C++ execution engine library for data management systems.
Role in this project:
DevOps Engineer & Build Engineer
DevOps Engineer & Build EngineerContributions:893 reviews, 13 commits, 168 PRs in 2 months
Contributions summary:Jacob primarily contributed to the project by enhancing the build and CI/CD processes. They added regular expressions to the CI/CD image check, made dependency sources configurable to improve build flexibility, and implemented a system information script for troubleshooting. Furthermore, the user moved the benchmark job to GHA, added a new workflow for building pyvelox wheels for multiple operating systems and python versions, and updated various setup scripts with the latest versions of dependencies and build configurations.
cppdata-managementquery-processing
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:Full-stack Developer
Full-stack DeveloperContributions:782 reviews, 75 commits, 317 PRs in 9 months
Contributions summary:Jacob's contributions primarily focused on improving the user experience and functionality of the R package within the Apache Arrow project. They enhanced the `write_dataset` function in the R package by refining its user interface and behavior, as evidenced by code changes in `r/R/dataset-write.R` and test modifications in `r/tests/testthat/test-dataset-write.R`. The user also addressed CI/CD issues, resolving errors, optimizing build processes, and maintaining the project's build infrastructure across various platforms, as well as updating the release processes.
apache-arrowarrowparquet
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