Data Warehouse Experts in Düsseldorf
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Meet FRATCH Experts in Düsseldorf, who have recently used Data Warehouse
Amit S.
Last position:
IT Project Manager – SAP S/4 HANA Delivery Consultant at CHG Meridian UK Limited
- Managed the integrated SAP S/4HANA delivery plan for 12 BTS workstreams, including milestone, dependency, and governance management.
- Coordinated end-to-end delivery across Business, IT, and Operations, focusing on execution, readiness, and issue resolution.
- Responsible for RAID, test, cutover, and deployment management to ensure a successful go-live.
- Implemented KPI tracking, status reporting, and PMO governance to provide transparent management of performance, risks, and escalations.
Songül D.
Last position:
Freelance SAP BW Consultant at DKV Mobility Services
- Designed and implemented enhancements in SAP BW on HANA 7.5 in the context of CRM migration and S/4HANA and BW/4HANA transformation programs
- Migrated SAPI data sources to the ODP framework as part of the S/4HANA migration
- Delivered SAP ECC data to Snowflake using BW data models and Calculation Views for Power BI analytics
- Integrated SAP and non-SAP data sources (including MS Dynamics)
- Improved reporting transparency through consolidated data models
- Optimized data loading processes for FI-CO data sources, significantly improving load times and system performance
Olaf K.
Last position:
CIO Advisor・IT Strategy・Tech/IT Due Diligence・Enterprise Architecture・IT Governance・AI Transformation・ex-BCG Platinion at Kiese IT
- -- ENGLISH Version (Deutsche Version unten) ---
Experience
- Ex-BCG Platinion: 14 years as Manager & Chief IT Architect, leading large-scale IT transformations in complex group structures
- 20+ years of C-level consulting across AI/IT strategy, enterprise architecture, IT organization, transformation, M&A due diligence, project recovery, and interim management
- IT leadership experience with cross-functional, intercultural teams of up to 100+ people
- Hands-on background in software engineering, IT architecture, and project management
- Fortune Europe 500 focus; numerous international projects; SME and start-up experience
Core services:
- IT strategy, enterprise architecture (EAM), target architectures and roadmaps
- PE/M&A/carve-out IT/tech due diligence, asset valuation, cost estimation
- GenAI transformation, process automation, and AI governance
- IT reorganization, target operating model (TOM), agile transformation
- IT governance, development and ITSM process optimization (BizDevOps, SAFe)
- Review and recovery of critical large-scale IT programs
- Planning and steering of transformation programs and IT project portfolios
- IT vendor and platform selection (RfI / RfP)
- Coaching & Interim management
Industries (selection): Insurance, financial services & banking, energy & utilities, telecommunications, retail & consumer goods, logistics, media, industry & engineering, healthcare, professional services
Projects (selection):
M&A Buy-side IT/Tech Due Diligence of an Acquisition in the Energy Sector (Utility, Smart Home) — AI-augmented with Anthropic Claude
AI Initiative for LLM-Based Optimisation and Automation of Sales and Billing Processes
Interim management Enterprise Architecture & group target architecture/roadmap development (METRO)
Reorganization: Design and introduction of agile IT target operating model at international wholesale group (METRO)
Design and implementation of agile BizDevOps target operating model (E.ON Grid Solutions)
Platform/vendor selection for renewal of core insurance solution of start-up (ELEMENT Insurance)
Establishment of project assurance capability and review/recovery of critical transformation projects (ERGO)
Enterprise architecture management and development of divisional/solution architectures (Deutsche Post DHL)
Strategic pricing architecture decisions in digital sales application landscape (E.ON Energie)
IT due diligence: Architecture evaluation and monetary valuation of IT assets (ProSiebenSAT.1 Media)
Interim management of group-wide security/compliance programme (ERGO)
Enabling an application landscape for different sales organizations and product structures (E.ON Energie)
Realignment of business/IT strategy and InsurTech platform selection (RfI, RfP) (nexible, ERGO Digital Ventures)
Stabilization/optimization of an agile/SAFe business/IT DevOps landscape transformation (Lufthansa AirPlus)
Process optimization and design/management of digitization and robotics introduction in power plants (RWE Nuclear)
BSS target architecture development for fixed/mobile networks convergence (Deutsche Telekom)
Optimization of IT organization model and methodology in application development and testing (Deutsche Telekom)
Evaluation of fulfillment of a general contractor agreement for run-off/migration of contract portfolios (ERGO)
-- DEUTSCHE Version (English version above) ---
Experience
- Ex-BCG Platinion: 14 years of strategy and implementation of large-scale IT transformations in complex corporate structures (Manager & Chief IT Architect)
- 20+ years of C-level-adjacent IT consulting: IT strategy, enterprise architecture, IT organization, transformation, due diligence, project recovery, and interim management
- IT leadership responsibility for cross-functional, intercultural teams of up to 100+ people
- Solid hands-on experience in software development, IT architecture, and project management
- Focus on Fortune Europe 500, numerous international projects; SME and start-up experience
Industries: insurance · financial services & banking · energy · telecommunications · retail & consumer goods · industry & engineering · logistics · media · healthcare
Services (focus areas):
- IT strategy, enterprise architecture (EAM), IT landscape target visions and roadmaps
- M&A/carve-out IT/tech due diligence, asset valuation, and cost estimation
- GenAI transformation, process automation, and AI governance
- IT reorganization, target operating model (TOM), agile transformation
- IT governance, development and ITSM processes (BizDevOps, SAFe)
- Review and recovery of critical large-scale IT projects
- Planning/steering of transformation programs and IT project portfolios
- IT service provider/platform selection (RfI, RfP)
- IT project management (agile, classic, hybrid)
- Coaching & interim management
Projects (selection):
- M&A buyer-side IT/tech due diligence of an acquisition in the energy sector (utility, smart home) — AI-augmented with Anthropic Claude
- AI initiative for LLM-supported optimization and automation of sales and billing processes
- Interim management of Enterprise Architecture and development of group target architecture in wholesale (METRO)
- Reorganization: design and introduction of an agile IT target operating model (TOM) at an international wholesale group (METRO)
- IT reorganization: introduction of an agile BizDevOps target operating model (TOM) at an energy group (E.ON Grid Solutions)
- Platform selection / vendor selection for renewal of the core insurance solution of a B2B2C start-up (ELEMENT Insurance)
- Process optimization, digitalization, and introduction of robotics in power plants (RWE Nuclear)
- Assessment of fulfillment of a general contractor agreement for run-off/migration of life insurance portfolios (ERGO)
- Business/IT strategy and InsurTech platform selection for a digital insurer/start-up (nexible, ERGO Digital Ventures)
- Enabling an energy application landscape for multiple sales units (E.ON Energie)
- Strategic architecture decisions in price management of a digital sales application landscape at an energy group (E.ON Energie)
- Stabilization/optimization of an agile DevOps IT transformation in business travel and payment management (Lufthansa AirPlus)
- Interim management in a group-wide security and compliance program of a global insurer (ERGO)
- Building project assurance capability as well as review and optimization/recovery of critical IT projects in an insurance group (ERGO)
- Building enterprise architecture management and development of domain and solution architectures for a logistics group (Deutsche Post DHL)
- M&A IT due diligence – evaluation and valuation of IT assets in the media sector (ProSiebenSAT.1 Media)
- Development of BSS target architecture and roadmap for fixed/mobile convergence (Deutsche Telekom)
- Optimization of IT governance/organization and methodology in application development and testing at a telecommunications group (Deutsche Telekom)
Olga M.
Last position:
Migration of the existing DWH from MS SQL Server to Azure Databricks at Oraylis GmbH
- Led the migration of the existing DWH, including HR data, application processes, project business and time tracking, from an MS SQL Server environment to Azure Databricks
- Refactored existing data models and ETL processes and extended them with new objects and functionalities
- Used Azure Databricks (Unity Catalog, Notebooks, Spark SQL, Databricks Dataflows) and Power BI
- Technologies: MS SQL Server 2019 (SSMS, SSIS), Power BI, Delta Lake, Azure Databricks
Christian W.
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 P.
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
Ricardo M.
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
Younes H.
Last position:
Senior Backend Developer at PTA
- Development and maintenance of database-driven applications for managing supplier and food contracts, with extensive use of Oracle PL/SQL 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 compliance with best practices in PL/SQL development and implementing standards for code quality and data integrity
- Close collaboration with backend and frontend teams to ensure smooth integration between the Oracle database, C#-based APIs, and Azure cloud services
Dalia C.
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based DWH and ETL system to replace legacy mainframe applications
- Development of a database optimization strategy and planning the rapid conversion of JCL and COBOL routines to PL/SQL with the help of AI
- Development of an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, employee training)
- Implementation of PL/SQL workflows for approval processes and creation of a responsive mobile version with JavaScript and CSS
- Use of Azure DevOps for backlog and documentation, as well as Git for version control
- Development of REST interfaces for CRM systems
- Replacement and reprogramming of Oracle Forms screens with Oracle Apex and upgrading to the latest Apex versions
- Design of a Git branching strategy and conducting code reviews
- Maintenance and further development of an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Data analysis and creation of charts in the Oracle Apex frontend; installation of standalone ORDS and Apex 23.1
- Agile working according to the Spotify Model; development of complex Apex screens with the support of Oracle JET
- New development and customization of existing PL/SQL packages, workarounds for database version differences and query optimization
- Development of Apex applications for broker pools to manage and optimize Oracle databases in the banking sector, including SSO-based authorization systems with OAuth2 and Keycloak
- Development of extensive Oracle Apex applications for BI and data mining modernization projects, as well as development of manual and automated projection methods in the frontend
- Implementation of data warehousing projects in the banking sector and use of Scrum and Kanban in team-oriented projects
Dr Daniel S.
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%
Peter W.
Last position:
Business Analyst at Finanz Informatik GmbH & Co. KG
- Maintenance and further development of the OSPlus software in the cash operations area
- Use of IBM Notes and HP Quality Center
Rakesh L.
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.
Dieter W.
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 Ö.
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
Jochen R.
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
Discover over 15,000 top freelancers
Statistics of experts using Data Warehouse
Aggregated from the professional profiles of matched freelancers.
Experience
26 years (Germany: 22 years)
Position duration
2.5 years (Germany: 3.2 years)
Positions per freelancer
13
Top business areas
Information Technology, Business Intelligence, Project Management
Top industries
Information Technology, Banking and Finance, Professional Services
Certification focus areas
Information Technology, Project Management, Business Intelligence
Bachelor's degree or higher
100% (Germany: 89%)
Master's degree or higher
85% (Germany: 59%)
Doctorate
15% (Germany: 10%)
Certifications per freelancer
5 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 95%)
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Düsseldorf are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Düsseldorf 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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Data Warehouse 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 (81%)
- Banking and Finance (63%)
- Professional Services (63%)
- Telecommunication (63%)
- Manufacturing (50%)
- Insurance (44%)
- Retail (44%)
- Transportation (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What it is
A data warehouse is a structured system for consolidating information from business applications, operational databases and external sources. It prepares consistent, historical data for reporting, analysis, forecasting and decision-making. Unlike a transactional database, it is designed for complex queries across large subject areas.
What it builds
Companies use data warehouses as the analytical foundation for finance, sales, supply chain, marketing and customer operations. Strong solutions turn scattered records into governed datasets, dashboards and reusable metrics.
- Executive and operational reporting
- Customer and product analytics
- Financial planning and performance analysis
- Supply chain and inventory insight
Ecosystem and tooling
Data warehouse work spans ingestion, transformation, storage, orchestration and consumption. Specialists commonly work with Snowflake, Google BigQuery, Amazon Redshift, Microsoft Fabric or Azure Synapse, alongside SQL, dbt, Airflow, Fivetran and BI tools such as Power BI, Tableau and Looker. The right combination depends on data volume, security needs and existing cloud architecture.
When companies need help
Freelance expertise is useful when internal teams are moving from spreadsheets or reporting databases to a governed analytical environment. It also helps during cloud migrations, merger-related data consolidation and modernization of an enterprise data warehouse.
- Reports use conflicting definitions
- Pipelines fail or lack monitoring
- Analysts wait too long for reliable data
- A new warehouse must launch without disrupting operations
What strong specialists deliver
Effective professionals clarify business definitions before choosing schemas or tools. They design dimensional or data vault models, build tested transformations, set access controls and document lineage. They also address incremental loading, slowly changing dimensions, cost control, query performance and recovery procedures rather than focusing only on initial delivery.
Working with experts in Düsseldorf
Düsseldorf-based companies may need warehouse specialists for retail, manufacturing, logistics, finance and professional services environments. On-site workshops can support stakeholder alignment, while remote collaboration works well for development, reviews and documentation. Clear communication in English or German should be agreed at the start, especially when business terms and reporting definitions are complex.
Frequently asked questions
Not sure where to start with Data Warehouse? These answers cover the essentials.
A data warehouse combines information from multiple operational systems so teams can analyse consistent, historical data. It supports reporting, dashboards, financial analysis, forecasting and business metrics without placing the same workload on transactional applications.
A data warehouse stores curated, structured data prepared for reliable analysis. A data lake usually retains broader raw or semi-structured information, while a data mart focuses on a department or business area. Many modern architectures use all three in complementary roles.
A strong data warehouse specialist should understand SQL, dimensional modelling, ELT pipelines, data quality and orchestration. Experience with cloud infrastructure, dbt, Airflow, security, metadata, testing and BI tools is also valuable because warehouse delivery crosses several technical layers.
The right data warehouse experience depends on scope, source-system complexity and the consequences of incorrect reporting. A focused transformation project may need a specialist who can work independently, while a regulated enterprise rollout benefits from proven skills in governance, migration, performance and stakeholder alignment.
Yes. Data warehouse work is often suitable for remote collaboration because modelling, pipeline development, testing and documentation use shared tools. On-site sessions in Düsseldorf can still help with discovery workshops, access decisions and agreement on business definitions.
Ask a data warehouse freelancer to explain a comparable architecture, the reasoning behind its modelling approach and how quality was measured. Review examples of lineage, automated tests, monitoring, documentation and cost controls, not only the choice of cloud provider.
A data warehouse choice should reflect workload patterns, governance, existing cloud services, team skills and cost controls. Snowflake, BigQuery and Amazon Redshift can all support analytical workloads, but their administration models, integration options, pricing behaviour and performance characteristics differ.
Maintainable data warehouse work includes clear models, version-controlled transformations, documented definitions, automated validation and observable pipelines. A good specialist also explains failure handling, access rules, deployment steps and how future sources or metrics can be added safely.
The average hourly rate of freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects is 99 €, which corresponds to a daily rate of about 794 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects, 100% hold at least a Bachelor's degree, 85% hold at least a Master's degree, and 15% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 2.5 years.
The most common languages among freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects are German (100%), English (94%), and French (31%).
The most common industries among freelancers in Dusseldorf, Germany who have used Data Warehouse in their recent projects are Information Technology (81%), Banking and Finance (63%), and Professional Services (63%).
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 (88%), and Project Management (88%).
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 
Stuttgart 
Dortmund 
Essen 
Hanover 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
