Data Engineer | Medior to Senior – Brussels

Permanent talent pool · Updated on 09/11/2026

Do you build data pipelines and are you looking for your next mission?

Nexalyaa offers freelance Data Engineer missions with Brussels organisations, mainly in the public sector. We are building a talent pool: you apply once, and we present the open missions that match your profile to you privately.

What you will do

• Design and maintain data integration pipelines (ETL/ELT).
• Model data for reporting and analysis (data warehouse, data lake).
• Deliver reliable datasets to BI and business teams.
• Monitor the quality, performance and security of data flows.
• Document the processing and work with analysts and architects.

Who are we looking for?

Must have

• At least 3 years of experience in data engineering.
• SQL and at least one programming language (Python or Scala).
• A cloud data platform, preferably Microsoft Azure (Data Factory, Synapse, Databricks or Fabric).

Nice to have

• Power BI or another reporting tool.
• CI/CD and Git.
• Experience in the public sector.

What we offer

• Missions of 6 to 12 months.
• A hybrid work arrangement, depending on the mission.
• A single Nexalyaa point of contact throughout the mission.

After you apply

1. Acknowledgement of receipt, then a reply within 3 working days.
2. A 15-minute call to get to know each other.
3. A private presentation of the open missions that match your profile.
4. Your CV is never sent without your written consent for the specific mission.

Apply using the “Apply” button or at jobs@nexalyaa.be, with your languages, availability and expected daily rate.