Power Query Expert in Cologne
for clean, reliable data flows with fast AI matchingHire experts who connect business data, build dependable transformation workflows and prepare models for Power BI or Excel. FRATCH matches you quickly with vetted, available freelancers whose skills fit your Power Query project.
Meet FRATCH Experts in Cologne, who have recently used Power Query
Alexander B.
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 A.
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 R.
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
Rüdiger T.
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
Thomas R.
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 R.
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 K.
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 H.
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 B.
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
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: 75%)
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 19 Sep 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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Power Query experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (100%)
- Transportation (67%)
- Healthcare (56%)
- Manufacturing (56%)
- Professional Services (56%)
- Retail (56%)
- Automotive (44%)
- Banking and Finance (44%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Data transformation
Power Query is Microsoft’s data connection and transformation technology. It lets teams import information from files, databases, web services and business systems, then clean, reshape and combine it through a repeatable workflow. The result can feed Power BI, Excel, Power Platform solutions and other Microsoft data processes.
M language and models
Power Query uses the M formula language for steps that go beyond the graphical interface. Strong specialists understand query folding, data types, parameters, custom functions, joins, pivots and reusable transformations. They also know how preparation choices affect refresh time, model quality and downstream reporting.
Connected Microsoft stack
Power Query sits within a broad ecosystem and often connects several tools:
- Power BI datasets and semantic models
- Excel workbooks and Power Pivot
- SQL Server, Azure data services and APIs
- SharePoint, Dataverse and business applications
- Power Automate and scheduled refresh workflows
Typical project work
Companies bring in Power Query specialists to replace fragile manual preparation with controlled data flows. Common assignments include consolidating finance files, standardising CRM exports, migrating spreadsheet logic, preparing operational dashboards and documenting data transformations. In Cologne, this can support local manufacturing, logistics, services and media teams while allowing remote collaboration across German and international offices.
When expertise matters
Freelance support is useful when reports disagree, refreshes fail or source systems change faster than internal processes can adapt. It is also valuable during a Power BI rollout, an Excel reporting redesign or a move from ad hoc files to governed data products. Look for help when:
- Queries are slow, duplicated or difficult to maintain
- Data sources have inconsistent names, formats or keys
- Business users need reliable self-service reporting
- Refresh permissions and deployment steps are unclear
What strong specialists deliver
Quality work starts with clear source mapping and a transformation design that others can understand. Strong professionals validate edge cases, preserve data lineage, reduce unnecessary loads and test refresh behaviour against realistic changes. They explain trade-offs in plain language, document M steps and leave behind queries that remain usable after handover. They can also collaborate on-site in Cologne or remotely, depending on access, security and stakeholder needs.
Frequently asked questions
Quick answers to the questions that come up most around Power Query.
Power Query is used to connect to data sources, clean and reshape information, and combine datasets through repeatable steps. It is common in Power BI and Excel, but it can also support Power Platform workflows and broader Microsoft reporting processes.
Power Query offers a visual transformation workflow and the M language, making it accessible for analysts while retaining advanced control. SQL can be more direct for database-side operations, so the right choice depends on source capabilities, governance and where the transformation should run.
A strong Power Query freelancer often understands Power BI modelling, DAX, Excel, SQL and data quality practices. Knowledge of APIs, SharePoint, Azure services, Dataverse and refresh security is useful when a project spans several Microsoft systems.
The required background depends on the scope. A simple Excel cleanup may need focused Power Query experience, while shared datasets, complex APIs or governed Power BI deployments call for deeper knowledge of M, query folding, model design and operational support.
Yes. Power Query work is often suitable for remote delivery when the specialist can access approved sources, documentation and test environments. On-site sessions in Cologne can still help with workshops, source-system discovery and stakeholder alignment, especially when requirements are not yet documented.
Ask the specialist to explain source assumptions, transformation steps, error handling and refresh behaviour. High-quality Power Query solutions use clear naming, reusable logic, sensible data types, documented dependencies and tests for changes in source data.
Power Query can handle substantial preparation tasks when sources, folding behaviour and refresh design are managed carefully. A specialist should identify which operations can run at the source, limit unnecessary data movement and recommend database or pipeline components when Power Query alone is not the best fit.
Professionals working with Power Query should be comfortable discussing data access, documentation and collaboration in the language used by the client team. For a Cologne assignment, German may matter for business stakeholders, while English is common in international Microsoft and data teams.
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 978 € 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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FRATCH CEO
