Axel Berron - Microsoft Fabric & Power BI Developer

Q: Where is Axel based?

Axel is based in Cluj-Napoca, Romania .

Q: What languages does Axel speak?

Axel speaks the following languages: German (Advanced), English (Advanced), Spanish (Advanced), French (Advanced) .

Q: How many years of experience does Axel have?

Axel has at least 14 years of experience. During this time, Axel has worked in at least 3 different roles and for 8 different companies . The average length of individual experience is 2 years and 7 months . Note that Axel may not have shared all experience and actually has more experience.

Q: What is Axel's latest experience?

Axel's most recent position is Microsoft Fabric & Power BI Developer at Energy Industry .

Q: What companies has Axel worked for in recent years?

In recent years, Axel has worked for Energy Industry , Entertainment Industry , International Trade Corporation , Automotive Supplier Industry , and Telecommunication .

Q: Which industries is Axel most experienced in?

Axel is most experienced in industries like Banking and Finance , Education , and Healthcare . Axel also has some experience in Telecommunication , Automotive , and Energy .

Q: Which business areas is Axel most experienced in?

Axel is most experienced in business areas like Business Intelligence , Information Technology (IT) , and Marketing .

Q: Which industries has Axel worked in recently?

Axel has recently worked in industries like Automotive , Energy , and Transportation and Logistics .

Q: Which business areas has Axel worked in recently?

Axel has recently worked in business areas like Business Intelligence and Information Technology (IT) .

Recommended expert

Cluj-Napoca, Romania

Experience

Oct 2024 - Dec 2025

1 year 3 months

Microsoft Fabric & Power BI Developer

Energy Industry

Migration of Tableau dashboards to Power BI, including transfer of KPI logic
Reconstruction and optimization of ETL pipelines in Microsoft Fabric with Dataflows and PySpark, including cost optimization
Design and implementation of a Medallion architecture (Bronze, Silver, Gold)
Establishment of governance standards and creation of documentation
Close collaboration with stakeholders to define and validate reporting requirements
Onboarding of business units into the self-service data platform
Successfully migrated reports to Power BI
Medallion architecture established as the foundation for self-service BI
Data processing times significantly reduced through optimized pipelines and PySpark in Fabric
Business units enabled to create their own reports in Power BI

Apr 2024 - Sep 2024

6 months

Microsoft Fabric & Power BI Developer

Entertainment Industry

Setup of a test environment in Microsoft Fabric to evaluate functions and architectural approaches
Development of initial ETL processes in Fabric for data source integration
Design and validation of a Medallion architecture as the foundation for a future self-service data platform
Creation of POC reports in Power BI to demonstrate the platform's capabilities
Documentation of results and derivation of recommendations for a potential rollout
Estimation and analysis of costs as well as capacity management within the Fabric evaluation
Proof of feasibility of Fabric & Power BI as a future-proof analytics platform
Establishment of a pilot framework as the foundation for potential organization-wide adoption

Aug 2023 - Mar 2024

8 months

Power BI Developer

International Trade Corporation

Creation of Power BI reports with parameters, slicers, bookmarks, and complex DAX calculations
Execution of detailed analyses on product and customer performance (e.g., ABC analyses, cohort analyses, CLV, conversion rates)
Modeling of data structures using Star Schema and Snowflake Schema
Development and optimization of ETL pipelines (SQL, Python, Power Query) for consolidating data from multiple source systems
Documentation in Confluence
Management of user roles, permissions, and workspaces in Power BI Service
Training of Power BI power users in applying best practices
Setup of custom validation rules and automated notifications
Reduced processing time by 40% through refactoring of a complex ETL pipeline
Delivery of management dashboards

Mar 2022 - Jun 2023

1 year 4 months

Power BI Developer

Automotive Supplier Industry

Development and maintenance of Power BI dashboards for controlling and management
Implementation of advanced features in Power BI (DAX measures, parameters, interactions with slicers and bookmarks)
Modeling of data marts to optimize storage and query performance
Creation and optimization of ETL pipelines with Python, Oracle SQL (views, tables, PL/SQL), and Power Query/Dataflows
Development of monitoring dashboards with predefined automated notifications in Power BI
Adaptation of data governance structures (role and permission concepts)
Training of end users in the use of Power BI dashboards and in building Power BI reports
Development of high-performance and user-friendly dashboards
Performance optimization through efficient data models and optimized ETL pipelines

Sep 2021 - Jan 2022

5 months

Power BI Developer

Telecommunication

Development of dashboards in Power BI for monitoring and analyzing the recommendation system
Integration and optimization of ETL processes with Python and PostgreSQL
Administration of Power BI Service workspaces as well as role and permission concepts
Development of a notification dashboard for monitoring ETL and batch pipelines
Handover and knowledge transfer of the developed dashboards and processes to an internal BI analyst

Jan 2021 - Jul 2021

7 months

Power BI Developer

Pharmaceutical Industry

Development of T-SQL-based ETL processes and data marts
Creation of Power BI reports for 30M+ records
Administration of Power BI Service including user and role management
Performance optimization through efficient data modeling and DAX optimizations

Aug 2020 - Dec 2020

5 months

Power BI Developer

Banking and Financial Services

Creation of interactive Power BI reports
Reconstruction and optimization of the Data Warehouse to accelerate data provisioning and reduce storage requirements
Optimization of existing Power BI reports to shorten loading and response times
15x acceleration of Power BI reports through optimization of the Data Warehouse and reports

Jan 2019 - Dec 2020

2 years

Power BI Developer

Telecommunication

Development of Power BI dashboards for sales and controlling analyses
Creation and optimization of ETL pipelines
Requirements analysis with business units to define relevant KPIs, reports, and data models
Development of data marts in MS-SQL

Jan 2011 - Dec 2019

9 years

BI Consultant & Data Analyst

Various Clients

Creation of reports and analyses for international clients in industries such as healthcare, banking, and higher education
Execution of cost analyses and forecasts to optimize IT systems
Development of SQL-based ETL pipelines for data integration
Development and delivery of dashboards with Tableau and Power BI
Collaboration with clients’ IT departments to prepare and process infrastructure and business data
Application of statistical methods to improve SEO analyses (on-page and off-page optimization)
Analysis of web traffic and business KPIs (e.g., Customer Lifetime Value, Conversion Rate, Bounce Rate)

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Banking and Finance (9.5 years), Education (9 years), Healthcare (9 years), Telecommunication (2.5 years), Automotive (1.5 years), and Energy (1 year).

Banking and Finance

Education

Healthcare

Telecommunication

Automotive

Energy

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Business Intelligence (14.5 years), Information Technology (14 years), and Marketing (9 years).

Business Intelligence

Information Technology

Marketing

Skills

Power Bi Stack:

Parameter
Slicer
Drillthrough
Tooltips
Row-level Security (Rls)
Object-level Security (Ols)
Power Bi Desktop
Tabular Models
Dax
Tmdl
Power Bi Service
Power Query
Tabular Editor
Bravo
Alm Toolkit
Dax Studio

Microsoft Fabric Stack:

Onelake
Lakehouse
Warehouse
Dataflow
Pipelines
Real-time Analytics
Notebooks
Activator
Cost Optimization & Capacity Management
Databricks
Sql

Technologies:

Etl/elt
Apache Spark (Pyspark)
Databricks
Power Apps
Power Automate
Azure Cloud
Data Modeling
Azure Devops
Git
Jira
Confluence
Apache Airflow
Dbt
Azure Data Factory
Python

Databases:

Oracle Sql
Sql Server / Ms-sql
Postgresql
Azure Sql
Snowflake
Salesforce
Star Schema
Snowflake Schema

Frameworks:

Scrum
Agile
Data Governance
Best Practices For Performance & Security

Programming Languages:

Python
Bash Scripting

Languages

German

Advanced

English

Advanced

Spanish

Advanced

French

Advanced

Education

Master in Data Science · Data Science

Bachelor in Applied Mathematics · Applied Mathematics

Certifications & licenses

Databricks Certified Associate Developer for Apache Spark 3.0

Microsoft Certified: Azure Data Scientist

Microsoft Certified: Fabric Data Engineer

Microsoft Certified: Power BI Data Analyst

Profile

Created

October 2025

Last Update

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Axel based?

Axel is based in Cluj-Napoca, Romania.

What languages does Axel speak?

Axel speaks the following languages: German (Advanced), English (Advanced), Spanish (Advanced), French (Advanced).

How many years of experience does Axel have?

Axel has at least 14 years of experience. During this time, Axel has worked in at least 3 different roles and for 8 different companies. The average length of individual experience is 2 years and 7 months. Note that Axel may not have shared all experience and actually has more experience.

What roles would Axel be best suited for?

Based on recent experience, Axel would be well-suited for roles such as: Microsoft Fabric & Power BI Developer, Power BI Developer, BI Consultant & Data Analyst.

What is Axel's latest experience?

Axel's most recent position is Microsoft Fabric & Power BI Developer at Energy Industry.

What companies has Axel worked for in recent years?

In recent years, Axel has worked for Energy Industry, Entertainment Industry, International Trade Corporation, Automotive Supplier Industry, and Telecommunication.

Which industries is Axel most experienced in?

Axel is most experienced in industries like Banking and Finance, Education, and Healthcare. Axel also has some experience in Telecommunication, Automotive, and Energy.

Which business areas is Axel most experienced in?

Axel is most experienced in business areas like Business Intelligence, Information Technology (IT), and Marketing.

Which industries has Axel worked in recently?

Axel has recently worked in industries like Automotive, Energy, and Transportation and Logistics.

Which business areas has Axel worked in recently?

Axel has recently worked in business areas like Business Intelligence and Information Technology (IT).

What is Axel's education?

Axel holds a Master in Data Science and a Bachelor in Applied Mathematics.

Does Axel have any certificates?

Axel has 4 certificates. Among them, these include: Databricks Certified Associate Developer for Apache Spark 3.0, Microsoft Certified: Azure Data Scientist, and Microsoft Certified: Fabric Data Engineer.

What is the availability of Axel?

Axel is immediately available for suitable projects.

What is the rate of Axel?

Axel's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.