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Guilhem SempereGS

Guilhem Sempere

Fullstack developer and bioinformatician

€695/day
Montpellier, FR
15+ years

Average response time: 1 hour

About Guilhem

I am a senior software engineer designing and developing web platforms dedicated to the centralization, exploration and sharing of large-scale scientific data.

For more than fifteen years, I have been working on production-grade infrastructures handling complex semi-structured datasets, including genomic variation data, dense genotyping matrices and annotated meta-omics data. My work is primarily focused on direct technical contribution, with strong emphasis on robustness, performance, maintainability and user experience.

I have been the lead developer on several platforms used in production, including Gigwa, metaXplor and WIDDE. These tools are primarily designed as data hubs, integrating standard exploration, quality control and utility services (e.g. filtering, exports, BLAST) to facilitate data sharing and reuse without requiring advanced bioinformatics expertise.

I am particularly interested in missions or collaborations where I can:
- contribute to the architecture and backend of data-intensive applications
- evolve and strengthen existing scientific platforms
- design cloud-oriented services for data sharing
- contribute pragmatically and operationally to technical projects

I also have significant experience in sequencing data processing, including the development of custom pipelines and tools aimed at simplifying access to sequencing data processing workflows for non-specialists (notably mbctools, a wrapper around vsearch with an integrated metabarcoding pipeline).
  • French

    Native or bilingual

  • English

    Fluent

  • German

    Conversational

  • Chinese

    Conversational

  • Spanish

    Conversational

Remote only
Primarily works remotely

Experience

  • CIRAD
    Bioinformatics engineer, genomic information system developer
    PUBLIC SECTOR
    August 2013 - Today (12 years and 10 months)
    Full design and implementation of NoSQL-backed genomic information systems: Gigwa, WIDDE, metaXplor (Spring Framework, MongoDB, jQuery, GitHub CI/CD, Docker...)
    Maintenance on those platforms + supervision of involved staff
    UI migration from jQuery to React.js
    Development of Python wrapper "mbctools" for VSEARCH (metabarcoding-oriented toolbox)
    Teaching on possible uses of developed software
    Sequencing data processing: pipeline design / adaptation / execution (RNAseq, metabarcoding)

    Genotyping data management MongoDB Java MySQL React.js
  • CIRAD
    Software engineer
    PUBLIC SECTOR
    March 2012 - June 2013 (1 year and 3 months)
    Montpellier, France
    Complete development of a web application for managing genotyping data
    Technical maintenance on numerous tools of the Southgreen platform: southgreen.cirad.fr
    Storage of large genetic data (contigs and RNA-seq variants) in MongoDB, creation of an optimized querying interface for response times. Import and export of files in FASTA and VCF formats.

    Technical Environment: MySQL, MongoDB, Eclipse, J2EE, Spring, AXIS, PERL, Tomcat, Apache, BioJava, GATK
    MySQL MongoDB Eclipse BioJava GATK
  • Bioversity International (CGIAR center)
    Software engineer
    October 2011 - February 2012 (4 months)
    Montpellier, France
    Development of an online ordering system for biological materials (banana plants)
    Implementation of various improvements to the MGIS website: www.crop-diversity.org/banana
    Technical Environment: SQL Server, Eclipse, GWT, CXF, Spring MVC, Hibernate, Tomcat
    SQL Server GWT CXF Hibernate Apache Tomcat

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Education

  • Master STIC-Santé
    Univ. Montpellier II
    2006
    Completed 4 specialized courses to refine expertise in bioinformatics
  • Chinese language degree
    Univ. Montpellier III
    2006
    With honours

Skill set

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