Christoph Zwerschke
Software Developer at CWA Compact Web Applications GmbH
Heidelberg, Baden-Württemberg, Germany
Summary
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Rockstar🎓
Top SchoolChristoph Zwerschke is a seasoned full-stack software developer and systems administrator with 21 years of experience building research-grade platforms and tooling from Heidelberg. He combines deep Python expertise—maintaining and porting core GraphQL libraries like graphql-core and contributing to graphene/gql—with practical front-end work on Angular UI components and Obsidian plugins, demonstrating rare fluency across stack and ecosystems. As CTO and co-founder of CWA GmbH and a long-term developer at DKFZ and the University of Heidelberg, he routinely delivers robust, well-tested systems for genomics and research infrastructure. Christoph’s contributions emphasize quality, compatibility and developer experience: from fixing tricky async tracebacks in GraphQL to polishing UI demos and documentation. His background in mathematics and physics underpins a pragmatic, detail-oriented approach to complex data and interoperability challenges.
21 years of coding experience
12 years of employment as a software developer
Dipl. Mathematiker, Mathematik und Physik, Dipl. Mathematiker, Mathematik und Physik at Heidelberg University
Stackoverflow
5,435reputation
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sql
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oracle
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python
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sqlalchemy
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Github Skills (60)
dependency-manager10
angular10
markdown10
dependency-management10
filesystem10
javascript10
restructuredtext10
pytest10
python10
package-management10
ui-components10
testing10
css10
typescript10
file-operations10
Programming languages (16)
Github contributions (5)
graphql-python/graphene-sqlalchemy
May 2017 - Apr 2022
Graphene SQLAlchemy integration
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits, 12 PRs, 78 comments in 4 years 11 months
Contributions summary:Christoph primarily contributed to the core functionality of the Graphene SQLAlchemy integration library. Their work included adding support for manually mapped tables, improving the handling of SQLAlchemy Enum types, and adapting the project's documentation and examples. The user also addressed issues related to dependencies and made minor optimizations to the codebase, enhancing the library's overall usability.
pythonsqlalchemyfastapigraphqlgraphene
graphql-python/gql
Dec 2019 - Sep 2021
A GraphQL client in Python
Role in this project:Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:2 releases, 5 reviews, 38 commits in 1 year 9 months
Contributions summary:Christoph contributed to the development of the GraphQL client in Python by fixing build issues, desupporting older Python versions, and supporting newer ones. They addressed deprecated method names and added required dependencies. The user also focused on improving test coverage and updating test dependencies, contributing to the overall quality and robustness of the client.
graphql-clientpythongraphql-in-clientgraphql-servergraphql
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