Alexander Bromberg-Senior Data Engineer
Check rate
Experience
Senior Data Engineer
RWE AG
Architected and maintained data products for renewable energy operations, covering wind turbine, grid-meter, and weather data. Built scalable ETL/ELT pipelines in Azure Databricks using Delta Lake (bronze/silver/gold layers) and processed data in various formats, including structured and semi-structured data. Contributed to a data quality framework supporting table and column documentation, outlier detection, and completeness metrics across all datasets within a data product. In addition, implemented a DORA KPI Databricks dashboard used across all data products. Optimized CI/CD processes in Azure DevOps to streamline deployment across development, test, and production environments.
Technology stack: Azure Databricks, PySpark, SQL, Delta Lake, Unity Catalog, Azure Data Lake, APIs, Dremio, Azure DevOps, YAML, Git, Databricks Workflows, Application Insights, Terraform, OpenAI API, Codex, LLM-assisted workflows
Lead Data Engineer
Hyve Group Limited
Designing and implementing a proof of concept (PoC) data warehouse to automate financial reporting, starting from the ground up. This involves establishing the Azure infrastructure, capturing customer requirements, and developing ETL pipelines within Databricks. Implementing data quality validation and outlier detection at the source to ensure accuracy and consistency throughout the reporting workflows. Engineering a high-performance tabular cube, deriving key performance indicators (KPIs), and crafting insightful dashboards in Power BI to support data-driven decision-making.
Technology stack: Databricks (PySpark), Databricks Unity Catalog, Python, SQL, Azure SQL Server, Azure Data Lake, Delta, Azure Data Factory, SSAS (Tabular), Microsoft Power BI, Git
Senior Data Engineer
Lufthansa Technik AG
Designed and developed various data products based on Microsoft Azure for internal stakeholders of the Lufthansa Group. Focused on establishing a unified data platform that facilitates the implementation and operation of diverse data products within a Data Mesh framework. Additionally, provided support to business units in realizing their specific use cases, aiming to optimize data availability and utilization across the organization.
Technology stack: Azure Synapse, Python, SSAS (Tabular), Apache Airflow, Microsoft Power BI, SQL, Azure SQL Server, Delta, Python Dash, Azure Event Hub, Azure Data Lake, Terraform, Azure Data Factory, Azure DevOps, Git
Senior Azure Engineer
Mercedes-Benz Group AG
Development of a scalable solution for migrating data from the customer's existing cloud to a new cloud. The solution must ensure the transfer of data (> 3+ Petabytes) at a transactional level. In addition, a robust backup concept must be developed to ensure that the data is always available and protected.
Technology stack: Azure Databricks, Python, Azure Functions, SQL, Azure SQL Server, Azure Data Lake, Delta, Azure Data Factory, Azure DevOps, Git, Azure Log Analytics, Azure Monitoring, Terraform
Microsoft Power BI Trainer
Fast Lane Institute for Knowledge Transfer GmbH
Delivered the official Microsoft course "Analyzing Data with Power BI (DA-100T00)", guiding participants through the full data analysis lifecycle — from data preparation and modeling to DAX development and building impactful, interactive reports.
Focus areas:
- Data preparation using Power Query
- Best-practice data modeling (star schema, relationships, DAX modelling patterns)
- Building robust DAX measures
- Designing user-centric dashboards and visual analytics
- Managing, securing, and publishing content in Power BI Service
- End-to-end project setup aligned with real-world business use cases
Senior Data Engineer
Mercedes-Benz Tech Innovation GmbH
Construction of a central vehicle data platform for automotive engineers to evaluate different model series and analyze prototype performance. The platform consolidates sensor and telemetry data, includes validation and data-quality checks to ensure reliable analysis, and enables engineers to quickly identify performance issues, compare models, and improve prototypes early in the development process.
Technology stack: Azure Databricks, Python, Azure Functions, SQL, SSAS (Tabular), Microsoft Power BI, Azure SQL Server, Delta, Azure Data Lake, Delta Azure Data Factory, Azure DevOps, Git
Freelancer | Data Engineer | Microsoft Certified Trainer (MCT)
Alexander Bromberg
Design, develop and operate scalable data-driven solutions based on Microsoft Azure.
Honorary Lecturer
Technical University of Cologne
- Basics Data Engineering & Data Warehouse
- Basics SQL
- Fundamentals of Data Science
- Cloud Computing Basics
Consultant
ORAYLIS GmbH
- Development Lead DWH / Big Data Architectures
- Building data platforms (ETL / ELT) in the Microsoft Azure Cloud (structured & semi-structured data)
- Processing of mass data in the data lake (>100 million rows per day)
- Building high-performance SSAS (Tabular) Cubes with Power BI integration
- Data modeling according to Ralph Kimball (Star – Schema)
- Processing of real-time streaming data in the Microsoft Azure Cloud
- Building tabular cubes and deriving KPIs according to business requirements
- Provisioning and securing Azure infrastructure (ARM / Terraform) as well as automatic (CI / CD) deployment
- Process analysis and project management
- Implementing data-quality checks (completeness, accuracy, consistency) across ingestion and transformation pipelines
Finance / Controlling
Picanova GmbH
- Process optimization at interfaces (accounting / finance / business intelligence)
- Creation and evaluation of monthly reports
Internship
HSBC Trinkaus & Burkhardt AG
- Settlement of securities transactions for national and international clients
- Reconciliation and clarification of trade mismatches, settlement fails, and account discrepancies
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Professional Services, Information Technology, Education, Energy, Automotive, and Manufacturing.
Business Area Experience
See which departments and functions this freelancer has contributed to most.
Experienced in Business Intelligence, Information Technology, Quality Assurance, Project Management, Research and Development, and Operations.
Summary
With over 10 years of consulting experience, I bring deep expertise in Microsoft Business Intelligence, Big Data, modern cloud data engineering, and AI-assisted software delivery.
- I specialize in Microsoft Azure and Azure Databricks solutions and work hands-on with Codex, OpenAI APIs, and LLM-based automation for development workflows, code migration, documentation, testing, and productivity.
- As an experienced Development Lead, I design and implement robust DWH and Big Data architectures.
- Building modern data platforms (ETL/ELT) on Microsoft Azure for structured and semi-structured data.
- Processing large-scale datasets, reliably handling workloads exceeding 100+ million records per day.
- Ensuring data integrity, governance, and security through access controls, compliance standards, and data quality measures.
- Developing dashboards and analytical models in Microsoft Power BI to support data-driven decision-making.
Skills
- Data Modeling (Kimball)
Languages
Education
University of North Florida
Semester Abroad · Business Economics · Jacksonville, United States
Technical University of Cologne
M.A. · International Business · Cologne, Germany · 1.7
FOM - University of Economics and Management
B.A. · Business Administration · Essen, Germany · 1.9
Certifications & licenses
Databricks Certified Associate Developer for Apache Spark 3.0 Azure Databricks
DP-200: Azure Data Engineer Associate Microsoft Corporation
DP-200: Implementing an Azure Data Solution Microsoft Corporation
70-776: Engineering Data with Microsoft Cloud Services Microsoft Corporation
70-534: Architecting Microsoft Azure Solutions Microsoft Corporation
70-533: Implementing Microsoft Azure Infrastructure Solutions Microsoft Corporation
70-775: Perform Data Engineering on Microsoft Azure HDInsight Microsoft Corporation
70-475: Design and Implement Big Data Analytics Solutions Microsoft Corporation
Microsoft Certified Trainer (MCT)
Statistics
Experience
Global Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
Similar Freelancers
Discover other experts with similar qualifications and experience
Ashkan Zadeh
Stefan Corsten
Jan Krol
Marco Skulschus
Christian Schulz
Jorge Machado
Tobias Holtkamp
Serge Kalinin
Marco Lindner
Umut Gülac
Experts recently working on similar projects
Freelancers with hands-on experience in comparable project as a Senior Data Engineer
Ashkan Zadeh
Christian Schulz
Tan Pham
Jorge Machado
Rodion Orlinskiy
Vladislav Lasmann
Lino Giefer
Thomas Hoefkens
Marco Lindner
Jan Krol
Nearby freelancers
Professionals working in or nearby Cologne, Germany
Andreas Schott
Yaroslav Shargorodskiy
Maurice Knopp
Martin Ejeagwu
Jonas Haid
Markus Blohm
Markus Glagla
Christoph Sawicki
Nenad Biresev
Nicole Freelancer
Most recent projects
FRATCH works with many companies and recruitment agencies. Here you will find our recently posted projects and opportunities.
