Data Engineer (employee or freelance)

Joining KEYES means giving purpose to your talent. Are you looking for an environment where technology is not an end in itself, but a lever to build a sustainable future? At KEYES , we are not just looking for technical expertise; we are looking for people who share our values. Do you want to continue your career and grow within one of Belgium’s leading IT companies? Join KEYES as a Data Engineer! We support large enterprises, the public sector, healthcare organizations, and SMEs in all their digital challenges : Infrastructure & Cloud Solutions, Cybersecurity Solutions, Business Software Solutions, Mainframe Solutions, Data & AI Solutions, Advisory Solutions, and Staffing Solutions. More information: www.keyes.eu THE BACKGROUND At KEYES , we don’t just keep up with technological developments — we shape them! Our strength lies in having full control over our infrastructure. Thanks to our own data centres, we guarantee our clients full data sovereignty, enhanced security, and compliance with the strictest requirements for privacy and governance. We have also developed our own generative artificial intelligence solution, SophIA, a Large Language Model (LLM) designed to meet the specific needs of businesses. Unlike generic market solutions, SophIA can be deployed, configured and customised directly within the client’s environment, ensuring full control over sensitive data and seamless integration with existing business processes. Joining KEYES means contributing to innovative projects where AI, sovereign cloud and next-generation infrastructure come together to create high-value solutions. It also means growing within a company that values expertise, innovation and autonomy, while making a tangible impact on tomorrow’s technological challenges. YOUR MISSION Source Identification and Profiling: Identify proprietary source systems, perform in-depth data profiling and document data flows. ODS Design: Design the Operational Data Store (ODS) model using a star or snowflake schema to meet operational and analytical needs, ensuring alignment with data governance standards. Prototyping: Develop SQL-based ODS prototypes on Oracle and validate functional and technical assumptions with users. UAT Support: Support User Acceptance Testing (UAT), gather feedback and adjust the models accordingly. Data Vault Development: Design and implement the Data Vault model for the Data Warehouse layer using WhereScape (BI Automation). Datamart Implementation: Deploy the datamart using WhereScape, building on prototype validation and ensuring performance on the Oracle database. Master Data Management (MDM): Contribute to defining and implementing MDM processes (deduplication, harmonisation and governance) to ensure the quality and reliability of master data. Performance and Optimisation: Monitor, analyse and optimise SQL queries, indexes and partitioning strategies to ensure response times meet business requirements. Documentation and Knowledge Transfer: Prepare technical documentation (models, data flows and procedures) and train development and operations teams. OUR OFFER A technical position with exchanges with business stakeholders. A team of enthusiastic, professional colleagues in which there is an excellent atmosphere and where expertise is shared. Tools and infrastructure that are consistently at the forefront of innovation. Personalised career support to help you with your development. Many training opportunities and certifications. A company with a friendly working atmosphere which is dynamic and oriented towards innovation. Fun times – a food truck, barbecue, after-work events, family day! Complete salary package Teleworking opportunities (up to 3 days a week). #LI-ES1 Between 5 and 10 years of experience in a similar role. A Master’s degree with a specialisation in technical IT is preferred for this position. Enjoys working in a team and has excellent communication skills. Strong analytical skills, combined with a genuine interest in IT challenges related to data processing. Advanced SQL skills are essential. Experience in designing and deploying an ODS in an Oracle environment. Experience in the insurance sector is an asset. Curious, autonomous and proactive. Good command of Kimball modelling (star schema) and the ability to translate business requirements into datamarts. Knowledge of Data Vault modelling is an advantage. Knowledge of WhereScape (BI Automation) is an additional asset. Availability to work on-site in Liège two days per week is required. Fluency in French is essential; knowledge of English is an advantage. Do you recognise yourself in this description? Do you want to learn more? Apply now! You will be contacted shortly What if the mission isn’t an exact match for you? Let’s stay in touch! Sign up, and we may contact you for other future opportunities: https://keyescareers.eu/find-my-job OUR RECRUITMENT PROCESS Our recruitment process is efficient, transparent and fair: