Available for Data Architecture Projects

Transforming Data
Into Intelligence.

I am Raphael Jessat, a Data Architect currently solving complex data challenges at Germany's biggest IT consulting firm. I specialize in building scalable data warehouses, cloud infrastructure, and actionable BI solutions.

Contact Me View Experience

Core Tech Stack

Azure

Power BI

Python

SQL

Experience

6+ Years

Professional Journey

Data Architect

Apr 2024 - Present

T-Systems International

Expert Data Engineer (Aug 2022 - Apr 2024)

Driving data architecture strategies at Germany's largest IT consulting firm. Specializing in Business Intelligence (BI), Transact-SQL, and Cloud Data Warehousing on Azure.

Azure Data Modeling ETL

Business Intelligence Analyst

Jul 2020 - Jul 2022

Peek & Cloppenburg KG

Data Analyst (Aug 2019 - Jun 2020)

Optimized retail marketing processes through data analysis. Extensive use of SQL Server (SSAS, SSIS, SSRS) and Python for advanced analytics and A/B testing.

Business Analyst

Oct 2018 - Jul 2019

Grand City Property

Focused on Real Estate Private Equity analysis, process optimization, and VBA automation in Excel.

Early Career & Education

Working Student

Olympus Europa (2016-2017)

Process Optimization & Analysis
Academic Tutor

University of Hamburg (2012-2015)

Teaching Maths, Statistics, Physics & R programming

Technical Proficiency

Leveraging a robust stack of modern data technologies to build resilient infrastructures.

Architecture & Cloud

Azure Data Warehousing ETL / ELT Data Modeling SSIS

Analytics & BI

Power BI ✓ A/B Testing SSAS Process Optimization

Languages & Tools

Python ✓ T-SQL ✓ R ✓ VBA Statistics

Transforming Data Into Intelligence.