Data Warehouse Experts in Dusseldorf
in minutes from over 15,000 CVs with the power of AIHire experts who design reliable data warehouse models, build ELT pipelines, and tune reporting layers for finance, sales, and operations. They work with cloud data warehouse stacks and classic DWH setups, with fast, precise matching from vetted, available freelancers.
Meet FRATCH Experts in Dusseldorf, who have recently used Data Warehouse
Dr Daniel Steinberg
Last position:
Director of Partner & Alliances, AI Use Cases, EMEA at Teradata Deutschland GmbH / Teradata Corporation EMEA
- Define EMEA ISV Go-to-Market strategy to push indirect SaaS sales
- Solve customer problems with AI embedding into new use cases and solutions
- Build partner ecosystem and sell partner solutions to drive platform consumption
- Enable cross-functional teams on AI use cases implementation
- Manage a cross-functional team of 7 FTE
- Built EMEA partner originated pipeline from scratch with 70 mn€ TCV and 20 mn€ ARR growth sales with cloud-based and hybrid solutions
- Increased co-sell rate from 20% to 40% and co-delivery rate from 25% to over 50%
Christian Wonneberger
Last position:
Software Engineer, cross-platform Application Manager at International major bank
- Creating interfaces between the legacy platform and the new container solution
- Coordinating required contributions from line units
- Moderating regular status meetings with the software vendor
- Minimally invasive conversion of TWS scheduling from the old to the new platform
- Environment: IBM Mainframe, DB2, CICS, MQ, Red Hat Linux, Oracle, Kubernetes, Kafka, Helm, GitLab, Jenkins
Ludo Prokop
Last position:
Senior Consultant at Insurance
- DWH modernization
- Migration from Informatica PowerCenter to IDMC/CDI
- Migration from IBM DB2 to Databricks
Technologies: Informatica IDMC, Databricks
Olga Methner
Last position:
Telefónica Deutschland Holding AG
- Implemented the BI solution and replaced the old BI landscape
- Led the “Sales Bonus Plan” subproject: expanded the existing solution and migrated to Azure (Databricks)
- Led the “Cognos Migration” subproject: expanded existing data warehouses based on MS technologies (source systems: Oracle), analyzed business requirements and designed the technical solution
- Expanded the relational DWH database
- Developed ETL processes using SSIS
- Developed the multidimensional database (OLAP Cubes/SSAS)
Ricardo Morita
Last position:
Controlling Staff Unit (CFO/Head of Controlling) at IT Security Solutions
- Process optimization, process design
- Business partnering, target vision
- Teambuilding
- Workflow design
- Budget, MEC
- SAP S4/Hana, Board
Hans-Dieter Große-Kreul
Last position:
Training as an AI Expert
I continuously expand my expertise in AI and automation, working with ChatGPT, OpenAI, Manus, Gemini, MS CoPilot, API, LangChain, Hugging Face, Manus, TensorFlow and Auto-GPT as well as Python-based ML frameworks and MLOps tools to intelligently transform classic software development, analysis, and testing processes.
Rakesh Lakhani
Last position:
Multi Domain Expert IT Infrastructure at Speira GmbH
- Development and implementation of multi-domain infrastructure strategies to optimize system performance in OT and IT.
- Design of security concepts for multi-domain infrastructures, including IT security management.
- Oversight of incident management, problem management, and change management.
- Managing the entire lifecycle of a strategic project, including planning, execution, delivery, and stabilization.
- Supporting IT governance, IT architecture, and risk management.
- Conducting workshops on IT security and infrastructure.
Younes Hadrous
Last position:
Senior Backend Developer at PTA
- Development and maintenance of database-driven applications for managing supplier and food contracts, using Oracle PL/SQL extensively for complex business logic and data processing
- Optimization of PL/SQL procedures, functions, and triggers to ensure the performance and scalability of Oracle database solutions
- Ensuring adherence to best practices in PL/SQL development and implementing standards for code quality and data integrity
- Close collaboration with backend and frontend teams to ensure seamless integration between the Oracle database, C#-based APIs, and Azure cloud services
Dalia Cananau
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
- Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
- Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
- Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
- Used Azure DevOps for backlog management and documentation, and Git for version control
- Developed REST interfaces to CRM systems
- Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
- Designed a Git branching strategy and conducted code reviews
- Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
- Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
- Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
- Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
- Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
- Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects
Dieter Wagner
Last position:
Freelancer at Morat Swoboda Motion GmbH
- Manual for the new cost center structure in SAP and the new posting procedures
- Plant controlling, operating cost sheets, and inventory valuation
- Rate determination in Excel for SAP
- Preparation of product calculations
Ulaş Öncül
Last position:
Freelance Business Intelligence Data Modeler at Vodafone Turkey
- Developed an in-depth understanding of the business processes and data in the corporation
- Assisted in maintaining the corporate data
Peter Weiß
Last position:
Business Analyst at Finanz Informatik GmbH & Co. KG
- Maintenance and further development of the OSPlus software in the cashier area
- Use of IBM Notes and HP Quality Center
Jochen Rieseberg
Last position:
Independent IT Consultant at Verti AG
- Project: Migration of large data sets
- Result: ETL route development with AWS Glue and Talend Open Studio
Werner Hendricks
Last position:
Insurance
- Migrations of DB2 databases to Oracle
- Design and creation of new databases based on ODA X7-HA / X9-HA RAC 12cR2 - 19.23 / Data Guard / Grid Infrastructure 19c
- Hardware: ODA X7 X9 / IBM
- Software: Oracle 12c-19.23 / Oracle Linux Enterprise 7.1–8.8
Discover over 15,000 top freelancers
Statistics of experts using Data Warehouse
Aggregated from the professional profiles of matched freelancers.
Experience
28 years (Germany: 22 years)
Position duration
2.4 years (Germany: 3.3 years)
Positions per freelancer
17 (Germany: 13)
Top business areas
Information Technology, Business Intelligence, Project Management
Top industries
Information Technology, Telecommunication, Insurance
Certification focus areas
Information Technology, Business Intelligence, Project Management
Bachelor's degree or higher
90% (Germany: 88%)
Master's degree or higher
70% (Germany: 57%)
Doctorate
20% (Germany: 10%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, French
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 Dusseldorf 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 Dusseldorf using Data Warehouse
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
Core purpose
A data warehouse brings data from many systems into one structured place for analysis. It supports reporting, dashboards, forecasting, and business reviews. Teams also refer to it as a DWH or, in cloud setups, a cloud data warehouse.
Typical work
- Model facts and dimensions for reporting
- Build ELT pipelines from ERP, CRM, web, and finance systems
- Create trusted layers for BI tools and self-service analytics
- Document metric definitions and data quality checks
Common stack
Strong specialists work across SQL, dbt, orchestration tools, and warehouse engines such as Snowflake, BigQuery, Amazon Redshift, or Microsoft Fabric. They also know how to manage access control, incremental loads, and testing so the warehouse stays usable over time.
When to bring help
Companies usually bring in freelance expertise when a warehouse needs a redesign, a migration, or faster reporting. That is common in Dusseldorf for retail, logistics, manufacturing, and finance teams that need cleaner data and shorter delivery cycles without adding permanent headcount.
What good experts do
They ask about source systems, business metrics, latency needs, and ownership before they write a model. They keep joins simple, naming consistent, and transformation logic traceable. They also know how to balance performance, cost, and maintainability.
Signs of fit
- Clear star or snowflake modeling choices
- Strong SQL and transformation discipline
- Practical experience with warehouse migrations
- Careful testing, monitoring, and documentation
- Good collaboration with analysts and business stakeholders
Frequently asked questions
Not sure where to start with Data Warehouse? These answers cover the essentials.
A data warehouse is used to combine data from many systems into one place for analysis and reporting. It helps teams build dashboards, track KPIs, compare time periods, and prepare consistent metrics for planning. It is not meant for day-to-day transaction processing.
A data warehouse stores structured, curated data that is ready for analysis. A data lake keeps raw or semi-structured data and gives teams more flexibility, but often less consistency. Many companies use both, with the warehouse serving as the trusted reporting layer.
Hire a Data Warehouse specialist when a model is getting slow, reporting is inconsistent, or a migration is blocking delivery. Freelance help also makes sense when you need short-term support for redesigns, ELT work, or a new BI layer. In Dusseldorf, this is often useful for teams that want focused delivery without a long hiring process.
A strong data warehouse specialist usually brings advanced SQL, dbt, orchestration, and cloud warehouse experience. Knowledge of dimensional modeling, testing, access control, and source-to-target mapping is just as important. Familiarity with BI tools and business metrics is a strong plus.
No. Data Warehouse is the concept and architecture; Snowflake is one of the most common platforms used to implement it. People also work with BigQuery, Amazon Redshift, and Microsoft Fabric, depending on the stack and cloud strategy.
A DWH project needs more than SQL knowledge alone if the data model, pipelines, and governance all matter. For a simple reporting layer, one strong specialist may be enough. For a migration or a multi-source platform, you usually want someone who has handled modeling, loading, and troubleshooting before.
Yes, most data warehouse work can be done remotely if access, tooling, and communication are set up well. On-site time can still help during discovery workshops, stakeholder alignment, or cutover planning. For Dusseldorf teams, a hybrid setup is often practical.
Look for clear modeling decisions, reusable SQL, data tests, and documentation that explains business logic, not just technical steps. A good cloud data warehouse specialist can also explain trade-offs between cost, performance, and maintainability. Ask for examples of migrations, metric definitions, or fixes to broken reporting, not just tool names.
The average hourly rate of freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects is 102 €, which corresponds to a daily rate of about 817 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects, 90% hold at least a Bachelor's degree, 70% hold at least a Master's degree, and 20% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects have 28 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects are German (100%), English (93%), and French (36%).
The most common industries among freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects are Information Technology (79%), Telecommunication (64%), and Insurance (57%).
The most common business areas among freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects are Information Technology (100%), Business Intelligence (86%), and Project Management (86%).
Main locations of FRATCH Experts, who have recently used Data Warehouse
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 
Cologne 
Frankfurt 
Essen 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
