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Daan Jansen

PROFILE

Daan Jansen

Daan Jansen developed and maintained multiple bioinformatics tools and packaging recipes for the bioconda/bioconda-recipes repository over five months, focusing on viral genomics and sequencing data analysis. He built and packaged tools such as Lassensus for Lassa virus consensus sequence generation, PolyAT for homopolymer quantification in FASTQ reads, Virasign for nanopore viral taxonomic classification, and RecMpox for recombination detection in monkeypox genomes. His work emphasized robust Python development, YAML configuration, and CI/CD-driven package management, ensuring reproducible builds, accurate metadata, and licensing compliance. Jansen’s contributions improved workflow reliability and expanded the repository’s capabilities for genomic research and deployment.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

7Total
Bugs
2
Commits
7
Features
4
Lines of code
245
Activity Months5

Work History

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for bioconda/bioconda-recipes: Key features delivered include the RecMpox CLI Tool for recombination detection and a critical Virasign packaging update to stabilize builds. Major bugs fixed: Virasign packaging metadata issues, updated checksums and version to 0.0.2, ensuring compatibility with Python requirements. Overall impact: improved genomic analysis capabilities and package reliability, enabling faster, more trustworthy deployments and research workflows. Technologies demonstrated: conda recipe maintenance (meta.yaml), checksum validation, semantic versioning, CLI tool development, Python packaging.

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for bioconda/bioconda-recipes: Delivered a new tool, Virasign, for viral taxonomic classification of nanopore sequencing data, expanding the repository's bioinformatics capabilities. The feature was implemented with commit 0875cdf208a815fb562dddfc394ca80de41975a6 and included a license update from GPL-3.0 to GPL-3.0-or-later. No major bugs were reported this month; CI tests and existing workflows remained stable. Overall, this work enhances viral sequence analysis capabilities, enabling researchers to classify nanopore-derived viral data more efficiently and reliably, thereby increasing pipeline value and research throughput.

November 2025

1 Commits • 1 Features

Nov 1, 2025

Monthly summary for 2025-11: Key deliverable - PolyAT recipe added to bioconda-recipes to quantify poly-A/poly-T homopolymers in FASTQ reads, with installation and testing instructions. This work enhances QC and downstream analysis for sequencing pipelines. No major bugs fixed this month; focus was on feature delivery and packaging quality.

July 2025

1 Commits • 1 Features

Jul 1, 2025

July 2025: Delivered Lassensus, a new consensus sequence generation tool for Lassa virus sequencing data, added to bioconda-recipes with complete packaging metadata (version, source URL, build configurations, dependencies). This enables end-to-end generation of consensus sequences from sequencing data and expands Bioconda's viral genomics capabilities, improving reproducibility and accelerating research workflows. Tech/business impact: faster data processing, reproducible builds, easier deployment across environments, and stronger traceability. Major bugs fixed: none reported this month. Technologies/skills demonstrated: packaging standards, dependency management, versioning, CI-ready configurations, and end-to-end workflow design.

March 2025

2 Commits

Mar 1, 2025

Month: 2025-03 — Focused on packaging quality and licensing compliance for bioconda/bioconda-recipes. Key fixes corrected package metadata in meta.yaml (version, checksum, license) and updated build/dependency metadata to ensure accurate packaging and licensing information. These changes reduce packaging errors, improve reproducibility, and strengthen compliance across distributions. Commits included d38fd127b820cf0eaef93924cf6d7a4021ddbc49 (. (#54572)) and 687a39e3475e9a205eebbb927a9eafa35f43a6b9 (Update meta.yaml (#54623)).

Activity

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Quality Metrics

Correctness94.2%
Maintainability91.4%
Architecture91.4%
Performance91.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

PythonYAML

Technical Skills

BioinformaticsCI/CDPackage ManagementPython developmentYAML configurationbioinformaticscommand-line toolspackage managementversion control

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

bioconda/bioconda-recipes

Mar 2025 Feb 2026
5 Months active

Languages Used

YAMLPython

Technical Skills

CI/CDPackage ManagementBioinformaticsbioinformaticscommand-line toolspackage management