Julia Sagert-Data Scientist
Check rate
Experience
Senior Data Scientist / Consultant
Cloud Nation GmbH
Python, SQL, PySpark, Databricks, Databricks SQL, Delta Lake, dbt, Azure Data Lake Storage, Azure Machine Learning, Azure DevOps, Power BI, Git, MLflow
- Developed, validated, and optimized predictive analytics and classification models using Python (pandas), SQL, and modern ML frameworks.
- Performed data analysis, feature engineering, model validation, cross-validation, and stability analysis to ensure robust model quality and performance.
- Communicated model assumptions, results, uncertainties, and limitations to business units, management, and technical stakeholders.
- Built scalable data and machine learning workflows in cloud-based analytics environments using Databricks and Microsoft Azure.
Data Scientist
Telefónica Germany
SQL, Python, Tableau, PowerBI, XGBoost, LightGBM
- Designed, developed, retrained, deployed, and tested machine learning models for predictive analytics use cases.
- Performed data-driven analysis using SQL and Python to extract insights from large datasets.
- Created data visualizations and analytical dashboards using Tableau, Power BI, and Python.
- Developed an XGBoost-based probabilistic churn prediction model for prepaid customers to estimate churn likelihood within customer-specific timeframes and support targeted outbound call campaigns.
- Analytical Lead for a project focused on uncovering AI-driven cross-selling and upselling opportunities.
- Internal Consultant providing specialized Analytics and AI expertise to the B2C Customer Marketing division.
- Engineered A/B testing frameworks to quantitatively evaluate and optimize the performance of marketing initiatives.
Working Student Geo Data Science
Riscognition
Svelte, Mapbox, Leaflet, Python, JavaScript, R
- Developed deep learning models for automated burned-area detection from geospatial data.
- Built interactive web mapping applications using Svelte, Mapbox, and Leaflet.
- Implemented data processing and analysis workflows in Python, JavaScript, and R.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Telecommunication and Information Technology.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Business Intelligence, Marketing, Product Development, and Research and Development.
Languages
Education
University of Applied Sciences
Master Eng · Geomatics · Bad Honnef, Germany
Ludwig-Maximilians-University
Bachelor Sc. · Geography · Munich, Germany
Certifications & licenses
Agile Project Management
GCP – Advanced Generative AI
Microsoft Fabric Data Engineer Associate
Microsoft
StackFuel Certificate - Data Scientist – Focus Python
StackFuel
Stakeholder Management
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Julia speaks the following languages: German (Native), English (Advanced).
Julia has at least 5 years of experience. During this time, Julia has worked in at least 3 different roles and for 3 different companies. The average length of individual experience is 2 years and 9 months. Note that Julia may not have shared all experience and actually has more experience.
Based on recent experience, Julia would be well-suited for roles such as: Senior Data Scientist / Consultant, Data Scientist, Working Student Geo Data Science.
Julia's most recent position is Senior Data Scientist / Consultant at Cloud Nation GmbH.
In recent years, Julia has worked for Cloud Nation GmbH, Telefónica Germany, and Riscognition.
Julia is most experienced in industries like Telecommunication and Information Technology.
Julia is most experienced in business areas like Information Technology, Business Intelligence, and Marketing. Julia also has some experience in Product Development and Research and Development.
Julia holds a Master in Geomatics from University of Applied Sciences and a Bachelor in Geography from Ludwig-Maximilians-University.
Julia has 5 certificates. Among them, these include: Agile Project Management, GCP – Advanced Generative AI, and Microsoft Fabric Data Engineer Associate.
Julia is immediately available full-time for suitable projects.
Similar freelancers
Discover other experts with similar qualifications and experience
Christian Schulz
Philipp Grunert
Mathias Wilhelm
Martin Musiol
Manuel Pasieka
Eduard Van kleef
Max Ritter
Fadi Shoaa
Jens Daube
Thomas Hoefkens
Experts recently working on similar projects
Freelancers with hands-on experience in comparable project as a Senior Data Scientist / Consultant
Marc Matt
Oliver Köhn
Stephan Sahm
Serge Kalinin
Michael Nelz
Ashkan Zadeh
Daniel Pape
Lino Giefer
Himanshu Negi
Karl Estermann
