Rayen Z.
IT Engineer | Business Intelligence & Data Analytics
Salary / Daily rate
35 Giessen, Germany
Freelance, open to permanent contract
Skills
Work experience
Information Technology Engineering Intern
BandSmile Tech
Feb 2025 - Present
1 year 9 months
Tunis, Tunisia
At BandSmile Tech, I am leading the implementation of a complete Business Intelligence and data management solution for a orthodontic clinic based in Geneva, Switzerland (B And Smile): Built a datawarehouse by restructuring a complex medical database (+115 tables). Developed Talend ETL jobs (incremental updates, dynamic schemas, data cleaning). Created Power BI dashboards to monitor financial, medical, and operational KPIs. Implemented predictive models in Python for cost forecasting and patient analytics. Contributed to the full-stack web platform (Spring Boot, Angular) for clinic operations.
Business Intelligence Intern
Al Buhaira Invest
Jul 2024 - Oct 2024
4 months
Tunis, Tunisia
Developed a BI system for equipment maintenance management. • Created Power BI models for monitoring costs and performance; designed 10 dashboards covering costs, reliability, and supplier evaluations; integrated KPIs and dynamic filters; used Python for fault prediction and cost forecasting. • Technologies: Power BI, SQL, Python
Web Development Intern
ESPRIT
Jun 2023 - Aug 2023
3 months
Ariana, Tunisia
Developed a recruitment web application using Symfony and MySQL; filtered candidates based on specific skills.
System And Network Management Intern
SMC YORK
Jul 2022 - Oct 2022
4 months
Ariana, Tunisia
Managed server infrastructure, system monitoring, troubleshooting, and software updates.
Education
Philipps Marburg University
Data Science (M.sc), Data Science
2025 - 2026
7 months
Ecole Supérieure Privée d'Ingénierie et de Technologies - ESPRIT
IT Engineering , Business Intelligence Speciality , Information Technology
2020 - 2025
5 years 4 months
Activities and societies: Community Involvement ( Clubs ,Associations … )