Power Query Specialist in Cologne
matched in minutes from over 15,000 CVs with the power of AI.Work with specialists who build robust data transformation pipelines, clean complex datasets, and automate Excel and Power BI workflows. FRATCH connects you with vetted, available freelance professionals in Cologne precisely matched to your business intelligence needs.
Meet FRATCH Experts in Cologne, who have recently used Power Query
Alexander Bromberg
Last position:
Senior Data Engineer at 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
Beshr Alnirabieh
Last position:
System Administrator – HealthCare IT & Data Infrastructure at Cellitinnen Hospital Association
- Integration of medical modalities (including ultrasound) into the existing IT infrastructure (DICOM, HL7) – put into operation within the planned timeframe.
- Administration and optimization of PACS systems for efficient archiving and distribution of radiology image data across multiple locations.
- Ensuring consistent data quality and seamless interoperability in data exchange between HIS, RIS, and PACS.
- Close collaboration with medical staff to analyze and digitally optimize clinical workflows.
- Requirements management and test coordination when implementing clinical requirements in complex IT structures.
Fahad Razzaq
Last position:
Data Science – Operations Optimization at Netto-marken
Project: Digitalization of Warehouse Processes | Building a Data Analytics Platform.
- Built a web-based workforce allocation system that digitized daily shift planning by matching worker expertise to operational zones, replacing manual coordination with a structured workflow adopted across the site, saving supervisors time on daily planning.
- Developed a real-time operational visibility dashboard giving supervisors a live view of task throughput and outstanding workload across warehouse zones throughout the day, helping reduce overtime and idle labour costs.
- Developed a slotting optimization solution to improve warehouse picking efficiency and reduce picking time per order, working directly with operations teams from concept through production deployment.
Technologies used: Python, Django, PostgreSQL, Pandas, NumPy, HTML, Java, JavaScript, Docker, Kubernetes, AWS, Power BI, GitHub Actions CI/CD, GitOps, Claude, OpenAI
Thomas Reick
Last position:
BI Consultant and Power BI Developer at Plusnet GmbH
- In-depth forensics of old and new data sources
- Enhancing existing reports and creating new data analyses
- Data preparation from source systems and semantic models
- Azure DevOps integration
- Tools/Skills: MS-PowerBI, DAX, MS-Office 365, PowerQuery, M, PowerAutomate, Redmine, SharePoint, SQL (T-SQL, Oracle), MS Fabric
Felix Rothstein
Last position:
Project Manager Logistics & Digitalization at Rhein Ruhr Logistik
- Managed logistics and digitalization projects in contract logistics focused on process optimization, automation, and KPI-driven control of operational logistics processes
Denis Kirpicev
Last position:
Management Consultant at Freelance Management Consultant
Implementation of custom reporting solutions for financial KPIs aligned with specific business requirements
Development of a machine learning application that achieved a 250% performance improvement
Data Architect "Production-Oriented Quality Assurance" (03/2024–09/2024):
Design and implementation of an analytics platform to detect quality deviations in manufacturing
Build of a scalable data lakehouse architecture on Databricks in combination with SAP ERP data via SAP Datasphere
Close collaboration with the SAP team to harmonize bill of materials and order data
Visualization of KPIs to support shopfloor management
Lead Data Engineer "Sales Performance Monitoring" (08/2023–12/2023):
Design and implementation of a Databricks-based platform for analyzing sales figures and promotion effects
Integration of SAP SD data via SAP BW/4HANA
Use of Azure DevOps to orchestrate ETL jobs and deploy workflows
Technical Project Lead "Cloud Migration & Data Strategy" (02/2023–05/2023):
Migration of a heterogeneous data warehouse stack to a modern cloud architecture on Azure with Databricks as the central processing platform
Development of a governance-compliant data architecture to integrate SAP financial data and non-SAP sources
Technologies: Databricks, Delta Lake, Python, SAP Datasphere, Azure DevOps, PowerBI, SQL
Vitali Haberkorn
Last position:
Power BI Expert at Media Agency
The project aims to migrate the company's existing Power BI Premium environment to Microsoft Fabric. This migration includes moving the existing data models, reports, and dashboards to the new platform to take advantage of the extended features and improved performance of Microsoft Fabric. The solution will be deployed in various regions worldwide to ensure a unified and consistent reporting and analytics environment for all locations.
Requirements analysis, migration planning, data migration, adapting reports and dashboards, testing and validation, training and support, deployment and monitoring, regional rollout.
Sebastian Beerendorf
Last position:
Management Consultant at Freelance
- Core-IT system assessment for a health insurance company
- Strategy development for a spectroscopy manufacturer
- Project management in the product development of a medical engineering manufacturer
- Process digitalization and development of technical interfaces for a telecommunication provider
Rüdiger Tiedemann
Last position:
Finance Director at PSG Germany GmbH, a Dover company
B2B pumps for chemicals, life sciences, semiconductors etc. Stabilization and optimization of the finance function, closing / budgeting / reporting / audits / SOX / PMI
Discover over 15,000 top freelancers
Statistics of experts using Power Query
Aggregated from the professional profiles of matched freelancers.
Experience
13 years (Germany: 15 years)
Position duration
1.1 years (Germany: 3 years)
Positions per freelancer
11 (Germany: 10)
Top business areas
Information Technology, Business Intelligence, Project Management
Top industries
Information Technology, Transportation, Healthcare
Certification focus areas
Information Technology, Business Intelligence, Project Management
Bachelor's degree or higher
78% (Germany: 94%)
Master's degree or higher
56% (Germany: 74%)
Doctorate
11% (Germany: 7%)
Certifications per freelancer
3 (Germany: 2)
Most common languages
German, English, Arabic
Speak two or more languages
100% (Germany: 95%)
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Cologne are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Cologne using Power Query
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Modern ETL and Data Preparation in Cologne
Cologne businesses generate vast amounts of data across legacy ERP systems, local databases, and cloud platforms. Power Query, Microsoft's data connectivity and preparation technology, serves as the engine that cleans, shapes, and merges this information. Local enterprises rely on this technology to turn raw operational data into structured, analyst-ready datasets.
Core Capabilities of the Technology
The framework allows specialists to connect to hundreds of data sources, from local CSV files to cloud databases. It uses a graphical interface to record data transformation steps while generating functional M code in the background. This ensures that complex data cleaning tasks, such as unpivoting columns or merging tables, are completely reproducible and automated.
Typical Business Use Cases
- Automating repetitive monthly reporting processes in Excel.
- Building robust data ingestion pipelines for Power BI dashboards.
- Merging disparate financial data from multiple subsidiaries.
- Cleaning unstructured survey data and customer lists.
- Transforming web-scraped data into structured tabular formats.
The Power Query Ecosystem and Tooling
The technology is deeply integrated into the Microsoft BI stack. Specialists work within Excel and Power BI Desktop, but also deploy queries to the cloud using Power Platform Dataflows. Understanding the underlying M formula language is crucial for creating advanced transformations, custom functions, and optimizing query folding performance against SQL databases.
When to Bring in Freelance Expertise
Internal teams often hit a wall when basic GUI-driven transformations slow down or fail due to high data volumes. A freelance specialist is needed when your queries take hours to refresh, or when you need to connect to custom APIs. Bringing in external help resolves complex data modeling bottlenecks quickly without hiring permanent overhead.
Qualifications of Top Professionals
Excellent specialists in the Cologne region combine deep technical knowledge of the M language with strong business acumen. They design queries that run efficiently, understand relational database theory, and communicate fluently in German or English. They easily collaborate with local IT departments to align data extraction with corporate governance guidelines.
Frequently asked questions
Quick answers to the questions that come up most around Power Query.
Power Query is primarily used to extract, transform, and load data from various sources into Excel or Power BI. It allows professionals to automate the cleaning and shaping of messy datasets without manual intervention. This ensures consistent, error-free reporting for business decisions.
While SQL performs transformations directly on the database server, Power Query is ideal for merging diverse sources like files, APIs, and databases together. It provides a visual interface that speeds up development, but advanced specialists often combine both by using query folding to push transformations back to the SQL database.
Yes, most Power Query specialists can work entirely remotely, though occasional on-site meetings in Cologne can be beneficial for initial requirements gathering. German companies often prefer experts who understand the local business culture and can align with European data privacy regulations like GDPR.
The graphical user interface allows users to click buttons to apply transformations, which Power Query automatically records as steps. Behind these steps lies the M formula language, which specialists write manually to handle complex logic, custom loops, and advanced data shaping that the GUI cannot perform.
When handling large datasets, Power Query relies on efficient query folding to delegate processing to the source database. If the source does not support folding, specialists optimize the M code, minimize steps, and remove unnecessary columns to prevent memory issues in Excel or Power BI.
When hiring a Power Query expert, look for strong skills in Power BI, Excel, and DAX for data modeling and visualization. Knowledge of SQL is highly valuable for database connectivity, and familiarity with Power Automate helps integrate data preparation into wider business workflows.
Yes, Power Query has largely replaced VBA for data gathering and cleaning tasks in modern Excel workflows. It offers a more stable, auditable, and low-code way to import and transform data, making spreadsheets less prone to errors than legacy macro-based solutions.
You can judge the quality of a Power Query professional by reviewing the structure of their M code and query steps. High-quality work features clearly named steps, modular queries, documented custom functions, and optimized performance that prevents slow refresh times.
The average hourly rate of freelancers in Cologne, Germany who have used Power Query in their recent projects is 122 €, which corresponds to a daily rate of about 974 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used Power Query in their recent projects, 78% hold at least a Bachelor's degree, 56% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Cologne, Germany who have used Power Query in their recent projects have 13 years of professional experience, with a single engagement typically lasting around 1.1 years.
The most common languages among freelancers in Cologne, Germany who have used Power Query in their recent projects are German (100%), English (100%), and Arabic (11%).
The most common industries among freelancers in Cologne, Germany who have used Power Query in their recent projects are Information Technology (100%), Transportation (67%), and Healthcare (56%).
The most common business areas among freelancers in Cologne, Germany who have used Power Query in their recent projects are Information Technology (100%), Business Intelligence (89%), and Project Management (78%).
Main locations of FRATCH Experts, who have recently used Power Query
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin 
Hamburg 
Munich 
Frankfurt Request a free demo
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Philipp Thomaschewski
FRATCH CEO
