Andrzej Oleś
Senior Software Developer at openrouteservice.org
Heidelberg, Baden-Württemberg, Germany
Summary
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Rockstar🎓
Top SchoolAndrzej Oleś is a Senior Software Developer based in Heidelberg with 13 years of experience building Java backends, R packages, and high-performance routing and image-processing tools. He blends academic rigor from a PhD in theoretical physics with practical DevOps and bioinformatics experience at EMBL and Bioconductor, enabling reproducible research and interactive visualizations. At HeiGIT and openrouteservice he optimizes graph algorithms to shave milliseconds off routing at scale, while contributing deep fixes to widely used projects like rmarkdown that improve PDF rendering internals. Comfortable across system administration, web technologies, and R/Shiny, he thrives on turning complex computational problems into reliable, production-ready software.
13 years of coding experience
10 years of employment as a software developer
Doctor of Philosophy (Ph.D.), Theoretical Physics, Doctor of Philosophy (Ph.D.), Theoretical Physics at Jagiellonian University
Polish, English, German
Stackoverflow
1,525reputation
116kreached
48answers
2questions
jpeg
top-5%
image
top-5%
image-processing
top-5%
Github Skills (16)
rmarkdown10
r-package10
pandoc10
r10
image9
image-processing9
jpeg9
markdown-it9
markdown9
grayscale6
rgb6
shiny6
tiff6
png6
binary-image6
Programming languages (13)
Github contributions (5)
rstudio/rmarkdown
Dec 2015 - Apr 2016
Dynamic Documents for R
Role in this project:
Back-end Developer
Back-end DeveloperContributions:6 commits, 3 PRs, 26 comments in 4 months
Contributions summary:Andrzej primarily focused on modifying the R Markdown package's underlying functionality. They made changes related to processing files, especially in relation to PDF generation, including how tex files are handled. The user also made modifications to the `output_format.R` file, specifically with how arguments are merged and passed to `pandoc_options()` and `knitr_options()`. These changes suggest a deep understanding of the package's internal workings and rendering processes.
literate-programmingpandocr-packagebookdownrstudio
aoles/shinyURL
Oct 2014 - Aug 2016
Contributions:66 commits, 42 pushes, 30 comments in 1 year 10 months
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