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Jelle ScholtalbersJS

Jelle Scholtalbers

Full Stack Developer - Django/DRF/VueJS/Docker/K8S

€800/day
Saint-Marcellin, FR
15+ years

Average response time: 1 hour

About Jelle

Backend-focused full-stack and AI engineer (Django/DRF + Vue.js) with a scientific computing background, specializing in data-intensive, research-driven, and AI-enabled applications.

Engagements run end-to-end, from user requirements through architecture, implementation, and production deployment. Scope covers UI design, data modeling, API contract design, and asynchronous processing.

Backend. Scalable Django + PostgreSQL systems with REST APIs, caching layers (Redis/Memcached), and message brokers (RabbitMQ). Robust authentication (JWT, OAuth) and production concerns such as automated backups and scheduled jobs are part of the standard delivery.

AI engineering. Integration of LLM-powered capabilities into existing products and workflows. This includes building AI chat assistants grounded in business context, selecting and switching between different model providers and deploying AI features in production environments. Comfortable rapidly exploring new domains and translating subject-matter expertise into effective AI-assisted user experiences.


Deployment & infrastructure. Applications are containerized with Docker and deployed on Kubernetes, backed by reliable GitLab CI/CD pipelines and cloud-native infrastructure.

Strict code-quality discipline: type hints, testing, pre-commit hooks, and technical documentation (MkDocs). Agentic coding workflows amplify all of this: spec-to-shipped-feature cycles compress, while automated review, testing, and structured planning hold the quality bar high.

Adjacent experience. HPC-based scientific workflows, GitLab administration for a large research institute. A core developer of the LabID open-source project, and a multi-tenant SaaS with schema-level data isolation (django-tenants) built on top of it.

Most useful when you need a senior generalist who can own a feature end-to-end, integrate modern AI capabilities into existing products, and who can also speak the language of the scientists you're building for.
  • Dutch

    Native or bilingual

  • German

    Fluent

  • English

    Fluent

  • French

    Basic

Can work on-site
Saint-Marcellin (up to 50km)

Experience

  • Freelance for EMBL
    FREELANCE SOFTWARE DEVELOPER
    January 2024 - December 2025 (1 year and 11 months)
    • LabID‑PROV (OSCARS, Horizon Europe grant No. 101129751): extending LabID to track and share data provenance with RO‑Crate, in line with FAIR principles
    • Modeling workflows and workflow runs in LabID and linking to Life Science research infrastructure tools, integrating WorkflowHub and Galaxy
    • Earlier contract: implemented S3 cloud storage support for LabID datasets: user‑supplied S3 credentials, URL‑referenced data and the full file management lifecycle (upload, download, deletion, sharing, metadata), compatible with EMBL and AWS S3
    • Designed the new "Workflow Run" assay type capturing input datasets, workflow version, parameters and execution configuration from Nextflow, Snakemake and Galaxy; extended the core assay model to accept datasets (not only samples) as inputs
    SAAS Docker DevOps software architect Cloud
  • EMBL
    BIOINFORMATiCIAN, FULL STACK DEVELOPER AND TECHNICAL LEAD
    October 2014 - September 2023 (8 years and 11 months)
    Heidelberg, Germany
    • Lead developer of LabID lab data management and Electronic Lab Notebook platform, used by 200+ employees; led feature and technical‑ requirement decisions and ran development and production deployments via CI/CD on EMBL's managed Kubernetes cluster
    • Production‑hardened and maintained EMBL GitLab: configuration in version control, automated backups, Docker registry and LFS; around 2280 users, 65 groups and 3600+ projects with no major downtime or security incidents
    • Initiated and launched EMBL Chat (Mattermost) in 2017 as a data‑protected alternative to externally hosted Slack, growing past 1000 registered users
    • Provided and maintained compute services (Galaxy, RStudio) and supported and trained EMBL staff
    Gitlab Kubernetes Tech Lead Continuous integration LIMS
  • Institute for Translational Oncology (TRON)
    BIOINFORMATICIAN
    January 2011 - September 2014 (3 years and 8 months)
    Mainz, Germany
    • Maintaining and customizing a Galaxy installation for R&D and as a LIMS for the NGS core facility
    • Development of the TRON Cell Line Portal that integrates RNA‑Seq expression, HLA and mutation data
    • Managing the HPC infrastructure for the NGS and bioinformatics department, including purchasing, configuration and maintenance
    • Supervising students, projects include the development of Galaxy LIMS, a RNA‑seq pipeline and a platform for sample reports within the DJango web framework

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Education

  • BACHELOR OF APPLiED SCiENCE, BiOiNFORMATiCS
    Hanzehogeschool Groningen / Hanze University ofApplied Sciences
    2008
    BACHELOR OF APPLiED SCiENCE, BiOiNFORMATiCS
  • SENiOR GENERAL SECONDARY EDUCATiON (HAVO) ‑
    Emelwerda College
    2003
    SENiOR GENERAL SECONDARY EDUCATiON (HAVO) ‑

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