Winni Kretzschmar
Principal Applied Scientist at Combient
Stockholm, Stockholm County, Sweden
Summary
🤩
Rockstar🎓
Top SchoolWinni Kretzschmar is a Principal Applied Scientist based in Stockholm with 16 years of experience turning mathematical and statistical research into production ML systems across biotech, pharma and energy. Holding a DPhil in Genomic Medicine and Statistics from Oxford, Winni combines deep academic credentials (30+ papers, 28k+ citations) with hands-on engineering—CUDA speedups, productionized sklearn pipelines, CI/CD and packaging strategies. They specialize in agentic and generative systems, Bayesian modelling and pragmatic prototyping, often bridging wet-lab teams and production engineers to deliver validated solutions. Winni is an active open-source contributor to widely used bioinformatics projects (notably MultiQC and bcftools) where they’ve improved data visualization, tooling and core plugin features. They excel at taking messy prototypes to robust, testable production code and have a track record of asking the questions others miss when designing experiments or systems. Colleagues rely on Winni for rigorous thinking, reproducible pipelines, and practical deployments on HPC and cloud infrastructure.
16 years of coding experience
9 years of employment as a software developer
DPhil, Genomic Medicine and Statistics, DPhil, Genomic Medicine and Statistics at University of OxfordContinuing Education, Mathematics, Continuing Education, Mathematics at Montgomery CollegeBachelor of Science (B.S.), Biochemistry, Bachelor of Science (B.S.), Biochemistry at Beloit College
English, German, French, Japanese, Swedish
Stackoverflow
1,505reputation
1.5mreached
25answers
4questions
tensorflow
top-5%
machine-learning
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keras
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deep-learning
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python
top-5%
Github Skills (45)
data-visualizations10
gnu-make10
package-management10
python10
command-line-interface10
bioperl10
conda10
data-visualisation10
bash10
c1110
perl10
makefile10
c1710
toolkits10
gatk10
Programming languages (24)
Github contributions (5)
bioperl/bioperl-live
Jun 2010 - Apr 2013
Core BioPerl 1.x code
Role in this project:
Back-end Developer
Back-end DeveloperContributions:27 commits in 2 years 10 months
Contributions summary:Winni primarily contributed to the `Bio::SeqIO::msout` module, which is a core component of the BioPerl project. Their work involved modifying the module's POD documentation, which included changes to the methods for retrieving and accessing data. The user also fixed a bug where the `msout` module was hanging due to multiple trailing endlines and implemented changes to handle files with fewer haplotypes than expected. These commits demonstrate improvements to both the documentation and error handling of the Bio::SeqIO::msout module.
bioperlbioinformaticsperltoolkit
bioconda/bioconda-recipes
Sep 2018 - Nov 2019
Conda recipes for the bioconda channel.
Role in this project:Automation Engineer / Build & Release Engineer
Automation Engineer / Build & Release EngineerContributions:1 review, 43 commits, 52 PRs in 1 year 2 months
Contributions summary:Winni primarily contributed to the build process and recipe creation for bioinformatics tools within the Bioconda repository. They focused on modifying `build.sh` scripts to compile software packages for various kmer sizes, and integrate dependencies. Additionally, they implemented changes to testing procedures to ensure the compiled packages behaved as intended. Their work included updates for build numbers and minor refinements to existing recipes.
biocondacondabioinformaticspackage-management
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