Recommended expert
Julia Sagert-Data Scientist
Available
Check rate
Experience
Apr 2026 - Present
5 monthsSenior Data Scientist / Consultant
Cloud Nation GmbH
Position Summary
Senior Data Scientist / Consultant at Cloud Nation GmbH
Industries
Information Technology
Business Areas
Business Intelligence
Information Technology
Explore Data Scientists in Germany
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.
Mar 2023 - Mar 2026
3 years 1 monthData Scientist
Telefónica Germany
Position Summary
Data Scientist at Telefónica Germany
Industries
Telecommunication
Business Areas
Business Intelligence
Information Technology
Marketing
Explore Data Scientists in 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.
Apr 2021 - Feb 2023
1 year 11 monthsWorking Student Geo Data Science
Riscognition
Position Summary
Working Student Geo Data Science at Riscognition
Industries
Information Technology
Business Areas
Information Technology
Product Development
Research and Development
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.
Telecommunication
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.
Information Technology
Business Intelligence
Marketing
Product Development
Research and Development
Languages
German
Native English
Advanced 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
Total positions 3
Experience in Telecommunication 3 y
Avg length 1 y 9 m
Longest experience 3 y
Expertise
Recent roles Senior Data Scientist / Consultant, Data Scientist, Working Student Geo Data Science
Main industries Telecommunication, Information Technology
Main business areas Information Technology, Business Intelligence, Marketing
Qualifications
Highest degree Master
Certifications earned 5
Profile
Created
Last Update
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.
Julia's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.
To hire Julia, click the Meet button on the profile to request a meeting and discuss your project needs.
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