Freelancer profile translated to English.
Back to original languageAbout Julian-Sebastian
You get more than clean data - you get dashboards that accelerate decisions.
I help product and data teams prepare their data in Power BI so that reports not only are accurate but also used. From data modeling in dbt to complex DAX logic to the finished dashboard design - I take over the complete BI stack or step in precisely where it gets stuck.
What I specifically help with:
- Power BI Semantic Models: Calculation Groups, RLS, Field Parameters, clean DAX taxonomies
- Analytics Engineering with dbt + SQL - Kimball modeling, SCD2, reproducible pipelines
- Dashboard design with a real design claim: readable layouts, clear hierarchies, no chart cemeteries
What sets me apart:I come from business administration/econometrics, but have a strong visual eye - more pronounced than with most BI profiles. The result is dashboards that stakeholders actually open.
Typical projects: Building BI from scratch, refactoring existing Power BI models, interactive reporting layers on existing data warehouses.
German
Native or bilingual
Russian
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- Bilthouse GmbHBusiness AnalystSOFTWARE PUBLISHINGOctober 2023 - Today (2 years and 10 months)München, GermanyPower BI dashboards for the executive board and leadership - from data modeling to finished dashboard design. Reports with 80+ monthly users, advanced DAX measures, Row-Level Security, and documented BI design standards in Figma and Zeroheight.Built a central star schema data model in dbt/Postgres that consolidates multiple billions in annual volume - reducing monthly KPI reporting from several days to a few hours.In addition, developed and produced a Python-based lead scoring model (sigmoid scoring via Postgres/dbt, results directly in Power BI) that controls Google Ads conversion uploads and SEA bidding.Furthermore, built revenue forecasting models based on cohort conversion logic and time series methods for C-level projections.Working method: close coordination with business stakeholders, LLM-supported workflows for documentation and prototyping, Git/GitHub, SCRUM.
- Bilthouse GmbHWorking Student Data & FinanceSOFTWARE PUBLISHINGOctober 2022 - October 2023 (1 year)Hamburg, GermanyEntry into the company through controlling and finance - with an increasing analytical focus.Developed automated FI/CO reporting tools for sales units. Built granular Excel financial models for cash flow analysis and PE fund reporting - focusing on data consolidation and decision-making basis for investors and consultants.Built granular Excel financial models to compare real estate cash flows against alternative asset classes - as a basis for decision-making for consultants in client discussions.In addition, automated private equity fund reporting: consolidated multi-source data and prepared it for investor relations.
- Sparakassen Risiko RatingsSoftware Tester of a Correlation-Based Asset and Risk Management SystemBANKING AND INSURANCEApril 2019 - November 2019 (7 months)Berlin, GermanySoftware testing for plausibility of a correlation-based asset and risk management system to verify compliance with BASEL regulations.Plausibility check of implemented calculations by replicating them in Excel/VBA.
Recommendations
Be the first to recommend Julian-Sebastian
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Master of Science Quantitative EconomicsChristian Albrechts Universität zu KielMathematisches VWL Studium mit überwiegend statistisch-ökonometrischen Inhalten. Fokus auf Wechselkursdynamik und Monetary Economics.
- Bachelor of Science Business AdministrationBrandenburgische Technische Universität Cottbus-Senftenberg2018BWL-Studium mit Vertiefung in Finanzmathematik, Ökonometrie und Makroökonomie. Thesis zur multivariaten makroökonometrischen Zeitreihenanalyse mit 1,0 als eine der jahrgangsbesten Arbeiten nominiert.