Data Visualization Experts in Dortmund
in minutes from over 15,000 CVs with the power of AI.Hire experts who turn raw data into clear dashboards, KPI views, and decision-ready stories with tools like Tableau, Power BI, and D3.js. Get fast, precise matching with vetted, available freelancers.
Meet FRATCH Experts in Dortmund, who have recently used Data Visualization
Claudia Clemens
Last position:
Process Analysis and Optimization at Pferdezüchterverband
Ashwin Parthasarathy
Last position:
Freelance Data Scientist at Mercor Intelligence
- Architected and deployed end-to-end machine learning pipelines across classification and prediction datasets, ensuring robustness and reproducibility through MLOps best practices.
- Contributed directly to LLM model output accuracy improvement by designing and engineering specialised prompts grounded in end-to-end ML and SciML pipeline logic.
- Developed training data for large language models by formulating coding problems that models could not resolve and subsequently documenting the correct solutions.
Dany-Armand Djeudeu-Deudjui
Last position:
Senior Data Scientist at ibg NDT GmbH
- Investigate the relationship between Eddy Current Testing (ECT) signals and microstructural properties
- Detect latent patterns in ECT data that reflect intrinsic material characteristics
- Develop and validate predictive models for microstructural classification and quantification, using hardness and case depth as benchmarks
- Apply Bayesian Structural Equation Modeling for advanced data analysis
Thomas Grevenkamp
Last position:
Senior .NET / Cloud Engineer at Freelance
Building an observability and alerting solution for Business Central Job Queue monitoring
- Built a central monitoring solution to track the Business Central Job Queue in a multi-organization environment in Azure DevOps
- Integrated Azure Application Insights and Log Analytics for structured collection and analysis of job runtimes and error events
- Developed KQL queries for targeted analysis of failed jobs and detection of error patterns
- Connected Grafana and Power BI to visualize operational metrics and job status in real time
- Implemented an automated alerting workflow with Power Automate – when a job fails, a notification email is sent immediately
- Ensured transparency about the state of productive background processes during live operations
Result: Full transparency over failed Business Central jobs · Clear reduction in response time through automated email alerting · Stable foundation for proactive operation of productive background processes
Technologies: Azure DevOps | Application Insights | Log Analytics | KQL | Grafana | Power Automate | Power BI | Business Central | Azure Monitor
Christian Weinbörner
Last position:
Interim Business Analyst / Product Owner at Bundesdruckerei GmbH (via FourEnergy GmbH)
- Initial assessment of requirements based on a business value prioritization framework
- Identification of issues as well as requirement gathering and evaluation using UML, BPMN, and design thinking methods for iterative requirements analysis through interviews and workshops
- Use of user story mapping in Miro to visualize and align functional requirements (e.g. correct transmission of all application data and attachments to the specialist system) as well as non-functional requirements (e.g. complete and verifiable deletion of an applicant's data) with stakeholders
- Proactive stakeholder management of internal and external stakeholders from public authorities, business units, organizations, and companies
- Preparation of status reports to communicate project progress and upcoming tasks transparently
- Responsibility for a REST-based integration solution (middleware) for secure data exchange between core systems and external specialist applications; ensuring stability and performance in day-to-day operations
- Support for Product Owners in prioritizing backlog items and in product discovery
- Communication of planning to internal and external stakeholders as well as interim assumption of Product Owner tasks and responsibilities during a staff change
Jean Erge Ekeu Tcheumeni
Last position:
Engineer - Automation Technology at Ravensburg Milchwerke GmbH
- Plan and design complex production systems as part of a team
- Develop and modify electrical circuit diagrams
- Design electrical machine controls and drive technology
- Troubleshoot electronic assemblies
- Develop PLC and visualization software as well as process control software
- Identify and implement optimization measures
- Create operating instructions
- Ensure IT security of all operational technology
- Support building services
- Technologies: Eplan P8, PCS7, ProLeiT, PlantiT, TIA, S7
Mohammed Abdallatif
Last position:
Data Scientist & Energy Consultant at Accenture GmbH
Ilja Leyberman
Last position:
Software Engineer/Architect (Tech Lead) at Mercedes-Benz Tech Innovation GmbH
- Implementation of various interfaces for subsystems and connection to external devices (cameras, scanners, digital lockers)
- Development of various interfaces in the used cars area
- Realization of various prototypes
- Support in UI/UX and data analytics
- Development of frontend and backend solutions
- Kubernetes migration
- Building CI/CD pipelines
- Communication with the business unit and technical design of new solutions
- Cross-team alignment and coordination within the team
- Overview of the entire technology stack and related systems
- Documentation, preparation, and conducting of reviews
- Supporting the team and coordinating releases and key milestones
Henning Pankratius
Last position:
Siemens
- Developed a reporting API with RESTful services and Spring Boot
- LDAP integration
- Migrated services to AWS
- Bootstrap
- Frontend development with Angular 14
- JBoss
- DynamoDB
- S3
- Athena
Dirk Lindgens
Last position:
Partner at CAPITALENT Gmbh
- Executive Search in the energy market
- Supporting companies in the sector with reorganization projects and with filling first- and second-level management positions during transformation processes
Discover over 15,000 top freelancers
Statistics of experts using Data Visualization
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 15 years)
Position duration
2.2 years (Germany: 3 years)
Positions per freelancer
11 (Germany: 9)
Top business areas
Product Development, Business Intelligence, Information Technology
Top industries
Information Technology, Healthcare, Professional Services
Certification focus areas
Business Intelligence, Product Development, Research and Development
Bachelor's degree or higher
75% (Germany: 92%)
Master's degree or higher
38% (Germany: 67%)
Doctorate
25% (Germany: 11%)
Certifications per freelancer
3 (Germany: 2)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 98%)
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 Dortmund 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 Dortmund using Data Visualization
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
Clear visuals
Data visualization turns complex data into charts, dashboards, and reports people can use. It helps teams spot trends, compare performance, and explain results without reading rows of tables. Strong work here is always tied to the decision the viewer needs to make.
Common tools
- Tableau for interactive business dashboards
- Microsoft Power BI for reporting and self-service analysis
- Qlik for guided exploration and analytics
- D3.js for custom visual experiences in web apps
- Looker and similar BI layers for model-driven views
Where it fits
Companies bring in specialists when reporting is fragmented, metrics are hard to trust, or leadership needs a cleaner view of operations. It also comes up in product analytics, finance, sales, supply chain, and customer reporting. In Dortmund, this often means working with industrial, logistics, and B2B teams that need clear internal reporting.
Good deliverables
A strong freelancer does more than make charts look good. They define the right visual form, connect it to reliable data, and keep interactions simple. Typical deliverables include dashboards, executive reporting packs, embedded visuals, and reusable chart components.
What to look for
- Strong data modeling and metric design
- Clear thinking about audience and context
- Experience with BI tools and front-end visuals
- Care with labels, filters, and accessibility
- Ability to explain trade-offs in plain language
Working style
The best specialists ask what decision each chart should support. They align on data sources, refresh logic, and the level of detail before building. For remote work, clear async review is usually enough; for local teams in Dortmund, on-site sessions can help refine stakeholder needs and chart logic quickly.
Frequently asked questions
Key details about Data Visualization, drawn from the questions we get asked most.
A strong Data Visualization specialist turns data into dashboards, reports, charts, and visual stories that support decisions. The work usually includes selecting the right chart types, cleaning up metric definitions, and making sure the result is easy to read. Many projects also involve Tableau, Power BI, or D3.js.
Data visualization focuses on how information is shown, while BI reporting is the broader layer that includes data models, access, and governance. In practice, the two overlap a lot, especially in Tableau and Power BI projects. If you need both, look for a specialist who can handle visuals and reporting structure together.
Bring in Data Visualization expertise when dashboards are hard to trust, reports take too long to update, or teams disagree on what the numbers mean. Freelance support also helps when a product or internal tool needs custom charts and the in-house team is busy. It is a good fit for short, focused work with a clear outcome.
A good Data Visualization freelancer often works with Tableau, Microsoft Power BI, Qlik, Looker, or D3.js. The right stack depends on whether you need business reporting, embedded analytics, or a custom web interface. Ask for examples that match your toolset, not just general dashboard work.
A strong Data Visualization specialist usually understands data modeling, SQL, business metrics, and basic UX. For web projects, JavaScript and front-end frameworks matter too, especially with D3.js or embedded charts. Clear communication is just as important as tool knowledge.
The right level depends on complexity, not on a title. A simple dashboard refresh may need a pragmatic Data Visualization specialist, while a multi-source executive reporting layer needs someone who can handle models, governance, and stakeholder alignment. The best test is whether the freelancer has solved a similar problem before.
Most Data Visualization work can be done remotely if data access, review cycles, and feedback are organized well. On-site time helps when many stakeholders need to agree on definitions, layout, or reporting priorities. In Dortmund, a mixed setup often works well for workshops and later review rounds.
Look for a Data Visualization portfolio that shows clear purpose, not just polished screenshots. Good work explains the audience, the data source, the decisions behind each chart, and the trade-offs made along the way. Ask the freelancer how they handle misleading visuals, accessibility, and changing requirements.
The average hourly rate of freelancers in Dortmund, Germany who have used Data Visualization in their recent projects is 96 €, which corresponds to a daily rate of about 771 € based on an 8-hour working day.
Of the freelancers in Dortmund, Germany who have used Data Visualization in their recent projects, 75% hold at least a Bachelor's degree, 38% hold at least a Master's degree, and 25% hold a doctorate.
On average, freelancers in Dortmund, Germany who have used Data Visualization in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Dortmund, Germany who have used Data Visualization in their recent projects are German (100%), English (90%), and French (30%).
The most common industries among freelancers in Dortmund, Germany who have used Data Visualization in their recent projects are Information Technology (60%), Healthcare (50%), and Professional Services (50%).
The most common business areas among freelancers in Dortmund, Germany who have used Data Visualization in their recent projects are Product Development (80%), Business Intelligence (70%), and Information Technology (70%).
Main locations of FRATCH Experts, who have recently used Data Visualization
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 
Essen 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
