Xian Chang
Postdoctoral Researcher at INRAE Occitanie-Toulouse
Toulouse, Occitania, France
Summary
🤩
Rockstar🎓
Top SchoolXian Chang is a postdoctoral researcher and bioinformatics engineer with eight years of experience building algorithms and data structures for pangenome graphs and sequencing data. Based in Toulouse, France, they co-authored vg giraffe and contributed backend improvements to the widely used vg toolkit—optimizing minimizer mapping and performance-critical plotting code. Their work bridges rigorous academic research (PhD in Bioinformatics from UC Santa Cruz) with hands-on open-source development, enabling faster, more accurate mapping of short and long reads to variation graphs. Xian’s background spans wet-lab sequencing internships and diverse model-organism studies, giving them uncommon insight into both experimental and computational genomics. Now at INRAE Occitanie-Toulouse, they focus on translating graph-based methods into practical tools for the genomics community. Colleagues describe them as a detail-oriented developer who finds elegant algorithmic fixes to messy, real-world bioinformatics problems.
8 years of coding experience
10 years of employment as a software developer
University of California Santa CruzBachelor of Science - BS, Biology/Biological Sciences, General, Bachelor of Science - BS, Biology/Biological Sciences, General at Carnegie Mellon University
English, French
Github Skills (7)
graph10
ggraph10
c-language10
genome10
cprogramming-language10
algorithms8
r7
Programming languages (7)
Github contributions (5)
vgteam/vg
Apr 2018 - Jan 2023
tools for working with genome variation graphs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 releases, 4 reviews, 1258 commits in 4 years 9 months
Contributions summary:Xian's commits focused on enhancing the functionality of the genome variation graph tool. They improved the minimizer mapper code to ensure optimal cluster handling, and also modified a plotting script to improve its performance. The user also made a merge from the master branch to distance-index-2.
genomegenome-graphdnagenomicsbioinformatics
xchang1/vg
Apr 2018 - Feb 2025
tools for working with genome variation graphs
Contributions:12 PRs, 1443 pushes, 115 branches in 6 years 11 months
genomegenomicsbioinformaticsgraphsvariation
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