Data Modeling Experts in Hamburg
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Meet FRATCH Experts in Hamburg, who have recently used Data Modeling
Panagiotis Tsafaridis
Last position:
Senior Data Engineer Consultant at GOLDNER GmbH
- Onboarded and conducted comprehensive documentation and system analysis to assess the existing data infrastructure, facilitating rapid integration and collaboration across functional data teams (modelling, processing, reporting).
- Collaboratively defined the architecture and project structure for a central data pipeline repository, including hierarchical standards, knowledge management strategies, and role-specific responsibilities, enhancing maintainability and onboarding speed.
- Evaluated and validated open-source data routing tools (Airbyte, Apache NiFi, Dragster) for ingest and sync requirements in retail analytics, including local benchmarking and error-state testing.
- Led the design and deployment of Airbyte in Kubernetes, creating customized Helm charts, securing secrets handling, and configuring Ingress with TLS and internal DNS routing, ensuring full API and UI accessibility.
- Troubleshot and resolved Ingress controller issues, iterating through multiple stages of debugging and testing, and documented setup and replication steps for scalable reuse.
- Mapped data models to ARTS standard, supporting schema alignment for ERP and reporting use cases, and coordinated review loops to align future data processing logic.
- Drafted strategic 1-pagers comparing MinIO, Pub/Sub, and routing architectures, providing technical guidance for architectural decisions and investment planning.
- Enabled secure access and authentication mechanisms, including initial evaluation for SAML integration, cluster-level configuration reviews, and service annotation improvements.
Jenny Lam
Last position:
Product Manager – Data & Sustainability at shipzero GmbH
Designed and implemented an initial product management framework
Created a process for prioritizing the product roadmap with internal stakeholders, considering business impact, resources, and technical feasibility
Led the migration to a product discovery tool to improve transparency and cross-team collaboration
Served as a liaison between tech and business teams
Managed data-driven sustainability projects for the largest key account, including implementing regulatory reporting (ISO 14083) on greenhouse gas emissions
Delivered complete data integration across 20+ source systems, coordinating onboarding and translating business requirements into technical specs for the development team
Enhanced the client's emission tracking and reporting accuracy through data quality analyses and identifying optimization opportunities
Dominik Piecuch
Last position:
Head of IT at Aarsleff Spezialtiefbau GmbH
- Disciplinary and professional leadership of the IT and service team
- Definition and documentation of the Current Mode of Operation (CMO) in Confluence: application landscape, infrastructure, networks, backup & storage
- Development of the Future Mode of Operation (FMO) including process analysis & stakeholder interviews with all departments using BPMN and flowcharts
- Optimization of license management: reduction of ongoing software costs by approx. 17% p.a.
- Introduction and establishment of Jira as the central tool for project and service management
- Introduction and rollout of the HR software MindKey to digitize HR processes
- Introduction of a VoIP solution with Microsoft Teams incl. PSTN connection to replace classic telephony
- Introduction of the production and planning software OptiControl to digitize operational processes
- Rollout of Intune as a Mobile Device Management solution for Windows, iOS and Android
- Build-up of Power BI dashboards for machine park monitoring and financial reporting
- Planning and execution of the IT consolidation of two locations for 170 users
- Introduction of automated penetration testing with Pentera
- Coaching and mentoring the team in agile methods & project management
- Operational support in day-to-day business: administration, incident & change management
- Management of external service providers and assurance of the quality of outsourced IT services
- Responsibility for the IT budget incl. planning and controlling
- Direct reporting line to management with regular management reports on IT KPIs, budget and project status
Rainer Diekmann
Last position:
Enterprise Architecture Management / Backend Software Developer at Polizei Hamburg
- Several projects in a police context
- Model and document police procedures/projects with Archimate (as-is/to-be) in the context of P20 (BKA)
- Create software architectures with microservices
- POC development with Springboot/Docker/Kubernetes
- Project size: 10 people
- Enterprise architecture management with Togaf and Archimate
- Backend software development Springboot
- DevOps with Kubernetes
- Implemented using: Java 17/21, Springboot 3, P20 architecture, Togaf, Archimate
Serkan Uyanik
Last position:
Manager Finance, Risk & Regulatory Reporting at movisco AG
- Project leadership and management
- Implementing reporting solutions in banks
- Enhancing and optimizing reporting processes in bank finance and risk departments
- Consulting through all phases of regulatory requirement implementation, including requirements analysis, defining business requirements, testing, tool development, and audit-compliant documentation
- Supporting regulatory implementation projects
- Analyzing business requirements and implementing reports
- Acting as a liaison between business and IT
- Publishing on regulatory changes
- Training internal colleagues on regulatory topics
Andreas Dietrich
Last position:
Interim Chief Technology & Product Officer at Babbel GmbH
- Restructuring for product-led growth in the field of digital user-centric tech product development language learning experiences
- Scaling empowered tech product teams
- Anti-fragile software engineering
Marc Clasen
Last position:
Consultant and Interim Manager at Marc Clasen Consultancy
- Strategic marketing and IT consulting with a focus on CRM
- Consulting for companies after buyout and restructuring of the business (eCommerce, marketing, IT, product management) in retail, automotive, DIY, building materials, TIMES, and tourism
- Strategy development for marketing, sales, and digital strategy, among other things
- Running IT tenders and implementation (ERP, CRM, POS, eCom, PIM, CMS, DAM)
- Implementation and data integration of CRM in marketing including loyalty program and campaigns
- Support for pitches for IT systems, implementation service providers, and agencies
- Development of omni-channel sales campaigns (online and offline) including customer journey and definition of insights and channels
- International scaling of business models
- Processes, organization, setup, and optimization of agile structures
- Development of SEO/SEA/content and CRM processes and structures
- Building marketing structures and strategies
Roland Kirsch
Last position:
SAP Consultant: Role Master Trainer at Kunde BeHaLa
- Developing and updating training programs on BP, SD, MM, PP topics according to the needs of the company and its employees.
- Creating and updating training materials such as presentations, manuals, and online resources.
- Identifying the team's training needs (TNA/TBA).
- Independently implementing a new company structure in RE-FX.
Alexander Pohl
Last position:
Head of integration for six country subsidiaries at XSYS Holding
- Analyzed the required scope of processes, infrastructure, and SAP for integrating the MacDermid subsidiaries
- Validated proposals from the new service providers
- Managed the collaboration and tracked the tasks of business and IT experts
- Coordinated communication and the PMO
- Created cutover plans in three waves for SAP conversion, Salesforce, and Ariba
Timo Warnke
Last position:
Project Manager, Requirements Manager, Business Analyst, Solution Architect at Service Provider for Heat Quantity Measurement
Supporting integration testing
Writing and creating the cut-over script
Conducting workshops to clarify requirements
Gathering business requirements
Business process modeling
IT design
Project planning
Supporting migration tests
Executing a greenfield S/4HANA conversion. A DATEV application and an AS400 are to be replaced by an S/4HANA system in a public cloud. The DATEV system runs the general ledger and accounts payable. The AS400 handles accounts receivable and business partners. The payables and receivables will be migrated to S/4HANA and the DATEV solution decommissioned.
Padma Priya Srinivasan
Last position:
Certified Data Scientist at XDi
- Successfully completed a 3.5 month data science course, earning the ‘Certified Data Scientist’ title from XDi, Germany (AZAV certified).
- Covered supervised and unsupervised machine learning algorithms.
- Covered natural language processing using Python.
Rolf Gardewischke
Last position:
Developer & Designer at Security authorities
- Migration of a case processing system with numerous interfaces to other systems from Spring and Activiti to a Java JEE application
- Further development into a cloud application
- Consulting, development, requirements analysis, specification and design
- Coordination with upstream and downstream systems
- Data modeling, programming and implementation
- Support with code reviews and ensuring clean code in the PL/SQL context
- Documentation in Confluence
- Troubleshooting PL/SQL applications including log analysis, session tracing and performance profiling
- Optimization and tuning measures in the PL/SQL environment
- Knowledge transfer and onboarding of new employees
- Use of Jira for task management, progress tracking and sprint planning
Stefan Simrock
Last position:
Business Analyst at Large municipal utility
- Conducting business analysis for battery energy storage systems and their marketing (BESS)
- End-to-end view of optimization and marketing processes including sales, technical qualification, implementation, optimization, marketing, billing, and cross-functional processes
- Designing and facilitating workshops with business units
- Preparing, aligning, and anchoring requirements
- Transitioning to the solution design phase and mapping requirements to IT solutions
Simson Otterbach
Last position:
Product Owner Salesforce at Hermes Germany GmbH
- Optimized and introduced Salesforce processes (Sales Cloud + Marketing Cloud) to support sales.
- Implemented processes for collecting requirements from various departments.
- Expanded reporting for transparency of project progress and backlog priorities.
- Managed the backlog, created user stories and acceptance criteria.
Axel Telthörster
Last position:
Migration of Host Programs to Decentralized Processing (Cobol to Java) at Freelancer
- Analysis of calculations in the legacy system (Cobol), reconciliation with specification and checking differences in the new system
- Managing change requests with Jira
- Basis for compare reconciliation: XML formats for further processing in Dopix (business: VS certificate, customer info, contribution statements)
- Automated XML comparisons via TWS jobs in various test systems
- Reviewing and documenting related utility programs and interface calls
- Reviewing legacy programs in terms of content, technology, and business logic
- Creating and extending JCLs for regression tests host <> decentralized
- Analyzing error cases and comparing with specifications for correctness
- Creating Jira tickets as requests or bug fixes for the Java programs
Technical environment:
- COBOL
- TSO/ISPF
- DB2/SQL (Spufi, QE2)
- IMS-DB/DC application development
- JCL, TWS (Tivoli), EJM Beta48 (AIX)
- Changeman (Extended Release Option)
- Citrix environment
- MS Office
- Ticket management with Jira
- Agile development
Discover over 15,000 top freelancers
Statistics of experts using Data Modeling
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 19 years)
Position duration
2.8 years (Germany: 3 years)
Positions per freelancer
13
Top business areas
Information Technology, Project Management, Business Intelligence
Top industries
Information Technology, Professional Services, Banking and Finance
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
83% (Germany: 92%)
Master's degree or higher
72% (Germany: 64%)
Doctorate
17% (Germany: 11%)
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
96% (Germany: 97%)
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 Hamburg 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 Hamburg using Data Modeling
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
What it covers
Data modeling defines how information is structured, connected, and kept consistent. It is the backbone of relational databases, warehouses, and reporting layers. Good modeling turns business rules into clear tables, keys, and relationships that teams can trust.
Common approaches
- Entity-relationship modeling for operational systems
- Dimensional modeling for BI and analytics
- Normalization to reduce duplication and errors
- Data warehouse and lakehouse schema design
Tools and methods
Experts often work with ER diagrams, SQL, dbt, and documentation tools. They also align models with source systems, naming rules, and governance needs. In Hamburg, this matters in logistics, trade, media, and finance teams that need shared, reliable data structures.
When to bring in help
Companies bring in freelance support when a schema needs redesign, a warehouse is getting messy, or new reporting needs a stable foundation. The same applies during migrations, mergers, or when product teams and analytics teams keep defining data differently.
What strong specialists do
Strong professionals ask about business processes before drawing tables. They can explain trade-offs between normalization and performance, and they know how to keep models maintainable as systems grow. They also document assumptions so developers and analysts can work from the same structure.
What to expect
For remote work, data modeling is often effective because the work depends on logic, examples, and review sessions. On-site time can help when many teams need to agree on terms, ownership, or legacy systems. Search terms such as data modelling, ER modeling, and dimensional modeling usually point to the same kind of expertise.
Frequently asked questions
What clients ask us most about Data Modeling — answered in short.
Data Modeling is used to define how business information is stored, linked, and interpreted. It helps teams build reliable databases, reporting layers, and warehouse structures that do not fall apart when the business changes. Good models also make it easier for different teams to use the same definitions for customers, orders, products, and events.
Data Modeling focuses on the shape of the data itself: entities, relationships, keys, and rules. Data architecture is broader and also covers platforms, integration patterns, security, and operational flow. In practice, the model is one of the core inputs that architecture depends on.
Bring in Data Modeling expertise when you are starting a new system, redesigning a database, or cleaning up inconsistent reporting. It is also useful during migrations to a warehouse or when teams disagree on what the data means. A good specialist can shorten review cycles and prevent structural mistakes early.
A strong Data Modeling specialist usually combines SQL, database design, and clear documentation habits. For analytics work, knowledge of dimensional modeling, dbt, and warehouse tools is valuable. Experience with source systems, governance, and business analysis also helps because the best models reflect real processes, not just tables.
Not always. Data Modeling work can be small and focused, such as a schema review, a star schema for one dashboard area, or a cleanup of naming and relationships. Even then, the specialist should understand the wider system so the model does not create later migration problems.
Data Modeling is the wider discipline, while ER modeling is one of its most common techniques. ER modeling is especially useful for operational systems where entities and relationships must be precise. In analytics, dimensional modeling is often a better fit because it supports faster reporting and simpler queries.
Data Modeling can often be done remotely because the work is based on workshops, diagrams, SQL, and review cycles. On-site collaboration in Hamburg can help when many departments need to agree on terms or when legacy systems are hard to explain from afar. Many teams use a mix of both.
A strong Data Modeling deliverable is easy to read, consistent, and tied to real business rules. Look for clear keys, sensible naming, documented assumptions, and a design that supports both current queries and future change. The model should reduce confusion, not add another layer of it.
The average hourly rate of freelancers in Hamburg, Germany who have used Data Modeling in their recent projects is 106 €, which corresponds to a daily rate of about 847 € based on an 8-hour working day.
Of the freelancers in Hamburg, Germany who have used Data Modeling in their recent projects, 83% hold at least a Bachelor's degree, 72% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Hamburg, Germany who have used Data Modeling in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.8 years.
The most common languages among freelancers in Hamburg, Germany who have used Data Modeling in their recent projects are German (100%), English (96%), and French (19%).
The most common industries among freelancers in Hamburg, Germany who have used Data Modeling in their recent projects are Information Technology (85%), Professional Services (46%), and Banking and Finance (42%).
The most common business areas among freelancers in Hamburg, Germany who have used Data Modeling in their recent projects are Information Technology (88%), Project Management (81%), and Business Intelligence (73%).
Main locations of FRATCH Experts, who have recently used Data Modeling
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 
Munich 
Cologne 
Frankfurt 
Dusseldorf 
Leipzig 
Essen 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
