Data Modeling Expert in Essen
to turn complex information into reliable systems, matched in minutes with vetted freelancersHire experts who design clear data structures, map business processes and deliver robust relational or analytical models. Work with vetted, available freelancers matched precisely to your requirements and ready for remote or on-site collaboration in Essen.
Meet FRATCH Experts in Essen, who have recently used Data Modeling
Fadi S.
Last position:
Development of a production-ready Enterprise Document AI & Recommendation Platform at Freelancer
- Development of a production-ready Enterprise AI solution for the automated processing of invoices and business documents
- Integration of Azure AI Document Intelligence and LLM technologies into existing business processes
- Development of robust REST APIs for automated document processing and system integration
- Extraction, validation, and storage of structured invoice data in Azure SQL as a base for analytics and machine learning models
- Development of an AI-based recommendation engine with machine learning and deep learning to generate personalized product recommendations based on historical purchase data
- Implementation of logging, monitoring, error handling, and validation mechanisms for stable production use
- Collaboration with business teams to define business rules and integrate the solution into existing enterprise processes
Technologies: Python, Azure AI Document Intelligence, Azure OpenAI, Azure SQL Database, REST APIs, Machine Learning, Deep Learning, OCR, Pandas, JSON, Workflow Automation
Boris S.
Last position:
Generalist expert for software development at Mercor
- Training AI models, evaluating images and text UI/UX, turning the provided data into insights through OpenAI Feather as part of the machine learning workflow
Technologies: OpenAI Feather
Hervé T.
Last position:
Senior Data Engineer at Schweizerische Post AG
Tools: Fabric, AWS, dbt, Power BI, SQL, DWH, R, Python
- Supported customers in implementing an architecture design for extracting and preparing data
- Planned the design and implementation of the BI and DWH platform
- Ensured the scalability and performance of the data platform
Daniel A.
Last position:
Sales Development Representative (SDR) at TenderFlow GmbH
- Acquires new B2B customers for an AI SaaS startup in the public tendering space and books product demos with IT decision-makers.
- Qualifies target customers based on a defined ideal customer profile, including discovery, needs analysis, and objection handling.
- Builds domain knowledge in public procurement (EVB-IT, German and EU procurement portals) for conversations on equal footing.
Asım Y.
Last position:
Freelance BI/DWH/ETL Specialist at Akbank
- Setting architectural standards for Informatica Power Center development teams
- Maintenance-performance-health for DWH (Exadata) environments
- Qlik Sense / BO reports architectural standards
- Implementing best practices in ETL tasks
- Documentation ETL standards on Confluence
- Dynamic Data Masking rules for GDPR/KVKK regulations by using Informatica DDM tool
- DWH Data model Power Designer
- Upgrade Qlik Sense versions
- Merge all Informatica server's repository databases on one Oracle DB
Ateet B.
Last position:
AI Engineer at MASX AI
Strategic transition into AI Engineering through intensive mentoring and project execution.
Developed MASX AI, an agentic AI platform integrating LangGraph, AutoGen, and RAG for geopolitical forecasting and real-time ETL.
Designed and delivered functional AI prototypes for prospective clients showcasing applied expertise in multi-agent systems, real-time data pipelines, and LLM integrations.
Waleed H.
Last position:
Product Manager - Process Intelligence & BI at SAP
Primary point of contact for stakeholders (particularly Group Controlling), responsible for the end-to-end Plan-to-Steer process as well as data-driven corporate planning and performance management using SAP Signavio, SAP Analytics Cloud (SAC), S/4HANA data models, KPI frameworks, reporting, dashboards, self-service BI, and advanced analytics.
Accountable for requirements and integration management of group-wide SAP BI solutions, including BI standards, data governance, and architecture guidelines.
Contributed to a global BI transformation program (rollouts, key-user trainings, documentation) to strengthen data literacy and drive continuous improvement.
Scaled a newly introduced feature from MVP to global rollout within SAP Signavio, reducing customer process modeling time by 40% and increasing NPS from 41 to 63 within two release cycles.
Hendrik L.
Last position:
Senior Modernization Engineer – Legacy Web App Performance & Refactoring (Energy Sector) at Levering IT GmbH
Re-architected a web application that had grown over years, modularizing tightly coupled components
Reduced response times from several seconds to <50 ms
Removed performance bottlenecks
Simplified architecture so internal teams can implement features on their own again
Angelo W.
Last position:
Expert Statistical Programming at Daiichi Sankyo Europe GmbH
- Lead Statistical Programmer for clinical trials
- Management of internal deliverables, programming resources, and external service providers (CROs)
- Development of automation systems and AI integration into statistical programming tasks
- Process analysis and KPI management for the leadership team
Alain Gérard E.
Last position:
Business Analysis / Requirements Engineering at 1&1
- Creating the functional specification for a dashboard solution for E2E management in the 5G deployment team in an Open RAN architecture
- Developing dashboards and reports with Power BI Desktop (data connection using Power Query, KPI calculations with DAX, publishing to Power BI Service)
- Developing solutions with Power Apps
- Integrating Power BI reports into Dynamics 365 Business Central
Daniel J.
Last position:
Information Security Consultant
- Enhanced quality assurance of documents, processes and required evidence in preparation for the upcoming KRITIS audit 2025.
- Reviewing and commenting on all relevant documents.
- Advising authors and document owners on inquiries and during the creation process.
- Supporting departments with IT security inquiries.
- Used tools/Frameworks MS Office, SharePoint, Jira, Confluence, ISO27001+, NIS-2 (EU 2022/2555), B3S (Statutory Health & Private Health Insurance), BSIG / IT-SIG 2.0, BSI-KritisV, BSI-C5, BSI Baseline Protection (200-2, 200-4), ServiceNow, RCE (EU 2022/2557), SGB, GDPR
Discover over 15,000 top freelancers
Statistics of experts using Data Modeling
Aggregated from the professional profiles of matched freelancers.
Experience
14 years (Germany: 18 years)
Position duration
1.9 years (Germany: 3 years)
Positions per freelancer
11 (Germany: 12)
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Banking and Finance, Telecommunication
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
90% (Germany: 92%)
Master's degree or higher
80% (Germany: 63%)
Doctorate
10%
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 97%)
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 Essen 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 Essen 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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
Data Modeling 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 (91%)
- Banking and Finance (55%)
- Telecommunication (55%)
- Transportation (36%)
- Manufacturing (36%)
- Retail (36%)
- Automotive (27%)
- Education (27%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What Data Modeling covers
Data Modeling defines how information is structured, related and governed inside a software system. It translates business concepts such as customers, orders, products and transactions into entities, attributes, relationships and rules. The result gives databases, applications and reporting systems a shared foundation.
From concept to schema
Experts usually work through conceptual, logical and physical models. They clarify business definitions, set keys and constraints, resolve many-to-many relationships and decide how data should be normalized or denormalized. They then turn the model into database schemas, migration plans and documentation that teams can maintain.
Systems and tooling
Data Modeling appears across operational databases, data warehouses, data lakes and analytics platforms. Specialists may work with SQL, PostgreSQL, MySQL, Microsoft SQL Server, Oracle Database, Snowflake or BigQuery, alongside modeling and documentation tools such as ERwin, SAP PowerDesigner and dbt.
- Entity-relationship and relational schema design
- Dimensional models with facts, dimensions and business metrics
- Data warehouse and lakehouse structures
- Data dictionaries, lineage and model documentation
When companies need support
Freelance expertise is useful during a new application, a database redesign or a migration between systems. Companies also bring in specialists when reporting definitions conflict, query performance declines or teams need a dependable model for master and reference data. In Essen, remote collaboration can support local industrial, logistics and service organizations without limiting the search to on-site availability.
Skills around the model
Strong professionals connect modeling decisions to software, analytics and governance. They understand SQL performance, indexing, partitioning, ETL and ELT pipelines, API contracts and data quality controls. Familiarity with privacy requirements, access rules, version control and cloud infrastructure helps ensure that a model works beyond the design document.
Signs of quality
A capable specialist asks how data is created, changed, consumed and owned before proposing tables. They make assumptions visible, use precise naming and test the model against real workflows and edge cases. Their deliverables are understandable to business stakeholders and practical for database and analytics teams to implement.
- Traceable links between requirements and model decisions
- Clear rules for keys, history, validation and ownership
- Practical migration and rollout guidance
- Documentation that stays useful after handover
Frequently asked questions
Quick answers to the questions that come up most around Data Modeling.
Data Modeling is used to define how information is organized, connected and managed in a database or analytical system. It supports application design, reporting, master data, data warehouses and integrations by giving teams consistent structures and definitions.
Data Modeling starts with business meaning and relationships before implementation details. Table design is one output of the process, while modeling also covers concepts, ownership, rules, history, reporting needs and how information moves between systems.
A strong Data Modeling specialist usually works comfortably with SQL, relational databases and schema migration. Experience with ETL or ELT, data warehouses, APIs, data quality, lineage and governance is valuable when the model spans several systems.
The right level depends on scope rather than a fixed duration. A focused schema review may need a specialist who can assess constraints and queries, while a company-wide warehouse or migration needs someone who can lead workshops, resolve conflicting definitions and guide implementation.
Data Modeling is well suited to remote collaboration when teams can share requirements, sample data, diagrams and decision records securely. On-site workshops in Essen may still help when domain knowledge is spread across business, operations and technical teams.
A Data Modeling decision should follow the main workload. Relational models suit transaction integrity and frequent updates, while dimensional models simplify analysis across consistent facts and dimensions; many organizations use both for different purposes.
A good Data Modeling deliverable connects business terms to entities, attributes and relationships without hidden assumptions. Check whether keys, constraints, history, ownership, edge cases and implementation steps are documented, and ask the specialist to explain trade-offs clearly.
Before beginning Data Modeling, clarify the systems involved, source quality, target workloads, reporting definitions and decision owners. It is also important to agree on deliverables, access controls, review stages and whether the work includes implementation, migration or only the model.
The average hourly rate of freelancers in Essen, Germany who have used Data Modeling in their recent projects is 99 €, which corresponds to a daily rate of about 791 € based on an 8-hour working day.
Of the freelancers in Essen, Germany who have used Data Modeling in their recent projects, 90% hold at least a Bachelor's degree, 80% hold at least a Master's degree, and 10% hold a doctorate.
On average, freelancers in Essen, Germany who have used Data Modeling in their recent projects have 14 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Essen, Germany who have used Data Modeling in their recent projects are German (100%), English (100%), and Spanish (18%).
The most common industries among freelancers in Essen, Germany who have used Data Modeling in their recent projects are Information Technology (91%), Banking and Finance (55%), and Telecommunication (55%).
The most common business areas among freelancers in Essen, Germany who have used Data Modeling in their recent projects are Information Technology (100%), Product Development (91%), and Business Intelligence (55%).
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 
Hamburg 
Munich 
Cologne 
Frankfurt 
Dusseldorf 
Leipzig 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
