Data Engineer, Lille

Data engineer at heart.

I built this passion for data manipulation and analysis through hands-on experience: messy problems, massive datasets, environments that don't agree with each other. When a project gets genuinely interesting and the data finally clicks into place, that's the moment that makes this feel like a career, not a job.

About

I've been a Data Engineer since 2022, with a hybrid profile across data engineering, governance, and analytics. Over the past few years I've hardened customer master data, industrialized critical pipelines, and made sure the data reaching business teams is something they can actually rely on, without coming back to me for every question.

What genuinely motivates me is the meeting point between technical and functional work: turning a problem into a clean data model, then into something useful.

Engineering & orchestration

Python, expert SQL, Airflow / Cloud Composer, DBT, Terraform, Docker, GitLab CI/CD.

Cloud & data

GCP (BigQuery expert, GCS, Pub/Sub, Dataflow), MongoDB, Data Warehouse modeling.

Quality & governance

Data lineage, reconciliation, single customer view (master data), monitoring, documentation.

Reporting & collaboration

Daily interface with business, CRM, and BI teams. Quick, functional Looker Studio monitoring dashboard (2022) for pipeline visibility; for Qlik, partnered with data analysts and built the underlying BigQuery data marts, rather than building the dashboards myself.

Experience

Oct. 2024 - Present
Data AI Engineer
SFEIR, assignment at illicado

End-to-end analytics engineering in a multi-source, high data-quality environment. Owner of the single customer view, industrialization of critical pipelines (Airflow / BigQuery, Change Data Capture), and contribution to an internal AI agents platform for the data team.

    Sept. 2022 - Oct. 2024
    Data Engineer
    Auchan Retail France

    End-to-end design of the B2B invoicing chain: collection, transformation, and exposure of data. Invoice volume cut by 20x on one flow, memory usage reduced by more than 50% on a critical program.

      Oct. 2021 - Sept. 2022
      Project Manager Assistant
      Auchan Retail France

      Gathering business needs, translating them into data specifications, incident analysis and resolution, automating quality controls.

      2021 - 2023
      Master's, MIAGE
      Université de Lille

      Applied Computer Science for Business Management. Google Cloud Professional Data Engineer certified since.

      Certifications & Training

      Google Cloud Platform

      Professional Data Engineer certification.

      dbt Training

      Completed with SFEIR.

      Blog

      Talk about the problem before the stack

      There's an irony here: the business side of a problem excites me just as much as the technical side does. Yet after an interview, I was once told I'd only shown the technical part. Looking back, that was an honest mistake on my part: I assumed the people listening only cared about the stack, so that's what I led with. What I've realized since is the opposite: going deep into the business problem, actually understanding why it matters before touching a single pipeline, is exactly what shows how much I care about the problem itself. The stack is just how I answer it, not the reason I show up.

      Lessons learned

      The bug is almost never where you're looking

      On a customer master data project, I spent days understanding why the same anomalies kept coming back. The lesson turned out to be simple: in a multi-source pipeline, the real problem is almost never in the code you're staring at. It's in an upstream assumption that quietly stopped being true. Since then, I'd rather build lineage visibility ahead of the transformation layer than bolt on tests afterward.

      Data Engineering

      Working with AI, hand in hand

      During my assignment at illicado, we built an agent platform on top of our data platform, largely using Claude. I'll admit I wasn't convinced at first. Once I actually started working with it, I felt genuinely conflicted: it can be a blessing and the exact opposite at the same time. On a topic I already know well, it makes the work remarkably easy. On something new, it's just as easy to fall into the trap of building fast and trying to understand the topic through the code it generates, instead of going straight to the business experts who actually know it. Lately, I've found a better rhythm: I let it do what it's fastest at (going through documentation, drafting code), but I take the time upfront to actually understand the topic myself, often by talking to the people who know it best, instead of falling into that trap.

      AI & Data

      Why psychology is a passion of mine, alongside data

      Psychology is a passion of mine, right alongside data, even though some people still treat it as a soft science, or worse, dismiss it outright. What convinces me otherwise is what we're learning about the body: autoimmune conditions, chronic illness, and even some cancers are increasingly linked to prolonged stress, not just genetics or bad luck. That's not a fringe opinion anymore, it's an active area of research. I take it seriously well beyond the headlines: in my day-to-day work, understanding this makes me more empathetic toward colleagues, and it shapes how I think about building a healthy team environment: one where people can actually thrive, not just perform, and where looking out for each other isn't an afterthought. If the right project came along, at the intersection of data and mental health or wellbeing, I'd genuinely love to work on it.

      Psychology & Data

      Contact

      Don't hesitate to reach out.