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# Senior Oracle DB Developer

- **Company:** Médiane Système
- **Location:** Brussel, Belgium
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Third Normal Form, Agile Methodology, Business Logic, Application Performance Management, JIRA, Software Quality, Databases, Data Vault Modeling, Relational Databases, Issue Tracking Systems, Oracle Databases, Performance Tuning, Scrum Methodology, PL-SQL, SQL Databases, Git, Star Schema, Oracledb
- **Published:** July 22, 2026
- **Apply:** https://www.careerjet.be/jobad/bed5d7723492132856a273eea590aec4d1

## About the Role

Happy at Work and Happy Clients labels by Choose my Company: A fulfilling work environment and optimal client satisfaction Job Description, Minimum 5 years Oracle DB development experience
Minimum 5 years SQL and PL/SQL development experience
Strong relational data modelling skills (ERD, 3NF)
Experience designing Data Vault and Star Schema architectures
Daily practice with GIT as Source Code Manager
Practical experience with Scrum / Agile ways of working
SQL and PL/SQL performance optimisation
Task and issue tracking with Jira
General database administration (security, tablespaces, schemas)
Languages
Native level in Dutch or French (C2)
Good level in the other national language (B1)
Good working level of English (B2)
Soft Skills
Understanding of IT landscape and business stakes in large industrial/railway environments
Ability to integrate smoothly into existing teams
Strong presentation skills and professional attitude
Clear, efficient communication with stakeholders and management
Structured, disciplined, long-term commitment

## Description

Our client is seeking a Senior Oracle DB Developer for a long-term program. You will work on new developments as well as corrective and evolutive maintenance in a full-time role based in Brussels.
Role & Responsibilities
Design and validate relational data models in 3NF based on functional analysis
Design and validate data models using Data Vault, Star Schema, or similar approaches
Implement data models and business logic in SQL and PL/SQL on Oracle databases
Ensure code quality and proper promotion management across environments (dev, test, acc, prod)
Analyse and optimise database and application performance (SQL and PL/SQL tuning)
Manage and validate deployment scripts across environments
Contribute to peer reviews and maintain up-to-date technical documentation Required qualifications


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