Data Visualization Experts
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Meet FRATCH Experts who have recently used Data Visualization
Stefan Ojanen
Last position:
Founder at ProtocolEngine.io
Evidence-led health intelligence platform turning published research into personal health protocols. It scores 430 habits, foods, and supplements against the studies behind them, and moves the score when the evidence moves. Built solo.
- Built the daily ingestion pipeline across PubMed, bioRxiv, and medRxiv: 43,000+ papers from 3,400+ journals processed into 230,000+ typed evidence claims, each one traceable back to the study it came from.
- Designed the six-factor evidence scoring model and the public changelog behind it, so no recommendation ever appears without the papers underneath it. 23,000+ grade changes recorded and explained to date.
- Shipped an entity information model connecting every intervention to its mechanisms, biomarkers, and outcomes: 118 biomarkers with region-specific reference ranges, 77 mechanisms, 32 graded outcomes.
- Built the personalisation layer: blood panel ingestion that reads lab PDFs with a vision model and corrects results for draw time against the user's wake anchor, plus Oura, WHOOP, and Withings integration for daily readiness context.
- Operate eleven specialised review agents over the corpus and codebase, covering paper curation, retrieval quality, health-claim compliance across EU and US regimes, and security.
- Shipped the Evidence Assistant, a RAG assistant that answers from the claim database and cites the underlying papers, plus a B2B practitioner tier, an Expo React Native app, and localisation across 3 languages and 7 markets.
Stack: Next.js 16, TypeScript, Supabase, pgvector, Anthropic Claude, Vercel, DeepInfra.
Wolfgang Orgler
Last position:
Business Analyst at DekaBank
Lead Business Analyst – Analysis and optimization of private banking processes
Responsibility for the business analysis and further development of business processes in private banking, with a focus on CRM, customer data management, and master data processes
Carrying out a comprehensive business process analysis to identify optimization potential, business gaps, and improvement opportunities along the customer lifecycle
Gathering, analyzing, and structuring business requirements in close cooperation with business units, management, IT architecture, and development teams
Creating and aligning business concepts, process models, user stories, and requirement documentation as the basis for technical implementation
Analyzing and optimizing existing master data processes with a focus on data quality, responsibilities, and efficient data maintenance
Designing and further developing CRM customer data processes while taking regulatory requirements and business goals into account
Planning and moderating workshops with business, IT, and stakeholders for requirements analysis, process design, and solution finding
Managing requirements and ensuring consistent communication between business and IT
Using AI-supported analysis tools to help with requirements analysis, structuring information, and improving documentation quality
Ursula Helfer
Last position:
Sub-Project Lead & Scrum Master at DB Energie
Sub-project lead in an agile IT environment
Leading a software development team (10 employees)
- Leading a software development team with 10 employees
- Budget responsibility approx. 3 million euros per year
- Conducting employee and job interviews
- Responsibility for resource planning (budget and employees)
- Digitalization of a web interface
- Regular reporting to customers and stakeholders (C-level)
- Product management: developing and implementing product strategies; defining requirements to guide product development
- Structuring product development & continuous testing efficiently to quickly incorporate feedback & compliance points
- Close collaboration with stakeholders & various teams to understand requirements, set priorities, ensure rollout, and increase user-friendliness
- Project experience in an energy industry company, including the functioning of energy markets, the basics of energy generation and distribution, as well as current challenges and developments in the industry
- Project experience in the railway sector - including the structure and operation of railway systems.
- Project experience within the 16.7 Hz traction power sector incl. knowledge of regulatory processes
- Formulating the sub-project charter and the project profile according to the project standard together with the project management
- Controlling service delivery according to the project charter
- Planning and controlling human resources including budget planning for the sub-project
- Ensuring the work capacity of the sub-project participants, e.g. by requesting access rights and documents for the sub-project team
- Planning and control for the respective sub-project (time, scope, budget) including the creation of necessary documents
- Alignment with the business department and Product Owners to plan the sub-project scope and the corresponding implications
- Executing milestone planning according to the agreed process model
- Effort estimation and support of sub-project controlling as well as overall project controlling in forecasting and planning
- Reporting sub-project status (according to status slide template) including progress (according to progress measurement)
- Analyzing, preparing, and addressing action and decision requirements
- Escalating sub-project issues to the project management
- Creating and managing Change Requests (CR)
- Quality assessment of completed task packages from a project management perspective (time, scope, and budget)
- Implementation management of the overarching guidelines and requirements in the sub-project, supported by cross-functional roles on the functional and technical side.
- Identifying, managing, documenting, and communicating opportunities, risks, and dependencies within and across sub-projects
- Supporting project management in creating the overall project plan and overall status reports
- Preparing and managing commissioning including the required documents and protection needs assessment
Scrum Master in an agile IT environment supporting a software development team in the full-stack area (7 people)
- Close collaboration with stakeholders & various teams to understand requirements, set priorities, ensure rollout, and increase user-friendliness
- Implementation of the selected Scrum method, including the required events, meetings, artifacts (product backlog, sprint backlog, burndown charts), metrics, as well as conducting required training in an agile IT environment
- Preparation of Scrum events such as Daily, retrospectives, Review, Sprint planning, estimation, and refinement (agile way of working)
- Moderation of retrospectives and elimination of obstacles to move the team and product forward
- Preparation of action items and retros via whiteboard and Figma
- Application and improvement of agile methods such as Kanban, Scrum, SAFe, or Scrum of Scrums
- Tracking the "Definition of Done" and "Definition of Ready" for all work results of the development team
- Advising on information flow and communication improvements between Product Owner and project team
- Experience with automation, validation such as mandatory field checks, notification functions, creation of filters, boards, and reports via JQL, and setting up cycle time
- Use of Jira & Confluence
- Setting up a progress measurement for project management to transparently map planned vs. actual team capacities and actual efforts for user stories
- Measuring team progress: creating team KPIs: "velocity", "burn-down chart", "throughput", "costs", "quality", "scope"
- Evaluation of agile metrics, process management, and process modeling methods (BPMN, EPC, UML)
- Communication and moderation know-how
- Methodological competence proven in conflict discussions
Thomas Müller
Last position:
Requirements Engineer (SPC) - ONE.CRM VW Salesforce Solution at CARIAD SE / Diconium Strategy GmbH
- Rework demand, development and operational organizational set up for the Solution Train
- Rework requirement refinement process flow from strategic theme to user story
- Introduction of visualization tools (Canvas) of work dependencies over different requirement levels and Solution Train leadership coaching
Christine Tantschinez
Last position:
Communications Consulting at Storytrend
Most mid-sized companies already have their numbers. What is missing is the translation: a dashboard with forty tiles does not answer a single question that is actually asked in management.
Analysis
- Evaluation of existing data with Python and SQL
- Checking data quality and methodology before making a statement
- The result is an analysis that leads toward a concrete decision
Preparation
- Reports in Power BI and Tableau
- Interactive calculators and visualizations on the web
- Presentations and specialist texts for customers, sales and the public
- Analysis and communication from one source — that
Kurt Häusler
Last position:
Interim Scrum Master / Agile Delivery Lead at Boehringer Ingelheim (via Fusion Consulting)
- Senior agile practitioner in a complex, regulated pharmaceutical environment — facilitating Scrum ceremonies across three international teams (~40 people) while supporting delivery governance and agile coaching.
- Time-limited assignment to bridge the gap until the client could fill the role internally
- Facilitated all Scrum ceremonies (Sprint Planning, Daily Stand-up, Review, Retrospective) across multiple international teams; kept sprints predictable and productive
- Coached teams and Product Owners in agile practices within a GxP-regulated environment, pragmatically balancing agile ways of working with QMS compliance requirements
- Tracked and visualized delivery metrics, managed dependencies, and produced status reports for senior stakeholders and Steering Committee
- Stepped up to project leadership of the internal CCMS product initiative: introduced structured processes and transparent tooling into a previously low-governance environment
- Actively contributed to the company-wide Agile Community of Practice, including authoring blog articles on agile topics
- Commended for analytical thinking, reliability under pressure, and the ability to manage multiple workstreams simultaneously
Niko Schmuck
Last position:
Developing Architect, Technical Lead "gridlytics" at HH Energienetze
- Building a data integration platform for high, medium, and low voltage assets for contextual analysis of time series with master data from the SCADA control system (IEC 60870 104), INIS, and SAP.
- Responsibility for the architecture and implementation of the solution, as well as sparring partner for the Product Owner.
- Use of Kotlin, Spring Boot, Maven, TimescaleDB, PostgreSQL, liquibase, Elements IoT, Docker, Kubernetes, Grafana, Python, jupyter, and various API gateways.
Loretta Acheampong
Last position:
Master Thesis Student at Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Future Fuels
- Managed end-to-end data workflows for LCA and carbon footprint assessments, including data collection, validation, structuring, and LCI modeling for metal alloys, ensuring high data quality and traceability.
- Developed a basic Excel automation tool to simplify carbon footprint calculations of metal alloys, replacing repetitive modelling in the software that previously took several hours.
- Communicated environmental impact results through quantitative analysis, visualizations and reports to support the broader project strategy.
- Performed environmental hotspot and scenario analysis to identify key impact drivers and assess opportunities for emissions reduction.
Yusuf Congar
Last position:
Senior Software Engineer at LeiKon GmbH
- Development of scalable backend applications with C#/.NET and Java
- Design and implementation of distributed microservice architectures
- Development and integration of REST APIs for industrial applications
- Development of modern web applications with React, Angular, and TypeScript
- Implementation of MQTT-based communication solutions
- Integration of industrial protocols such as OPC UA and Modbus TCP
- Development of batch, process control, and HMI components
- Containerization and deployment of applications with Docker
- Conducting code reviews and supporting architecture decisions
- Close collaboration with product owners, QA, and interdisciplinary teams
- Analysis of business requirements and implementation of technical solutions
- Further development of existing software architectures with a focus on maintainability and performance
Technologies: C#, .NET, ASP.NET Core, Java, C++, React, Angular, TypeScript, Vue.JS, MQTT, OPC UA, Modbus TCP, Docker, GitLab, MariaDB, MySQL, Linux
Claudia Clemens
Last position:
Process Analysis and Optimization at Pferdezüchterverband
Felipe Drummond
Last position:
Senior PMO Expert at RWE Technology International
Project scope: Supported the establishment, scaling and continuous improvement of project management and support processes by modernizing governance, processes, documentation, deliverables tracking, training content and tool-supported ways of working across a complex energy project environment.
Key contributions
- Supported the build-up and maturation of the PMO department, including governance structures, operational frameworks, project management processes, templates and deliverables tracking mechanisms.
- Conducted As-Is analysis of existing processes and their documentation, including process inventory, interface mapping, problem identification and creation of visualizations and white papers to improve shared understanding.
- Reviewed and improved project management documentation, templates and work instructions, including support for a project document master list to strengthen standardization and control.
- Designed and supported rollout of a lessons learned process and related system/application, including pilot preparation, coordination and implementation support.
- Mapped and supported implementation of a new resource management process connected to the rollout of a resource planning tool.
- Led and supported adoption of agile ways of working and Atlassian tools, including Jira and Confluence team boards, plans/roadmaps, dashboards, sprint planning and retrospectives.
- Acted as key user for continuous usage improvements in PMO tools and collaboration practices.
- Developed training curricula, instructional videos, supporting materials and PMO Open Doors sessions to improve capability transfer and provide a recurring forum for updates and information sharing.
- Developed a skills matrix concept and supported rollout as a basis for structured capability management and training demand analysis.
- Supported preparation of department offsites, implementation of a new Integrated Management System (IMS), creation of a SharePoint-based PMO website and department integration after restructuring.
Results / business impact
- Improved project management & PMO structure, processes and their documentation
- Enhanced transparency and standardization across processes, documentation, governance routines and project deliverables tracking.
- Enhanced information flow and knowledge transfer through SharePoint-based communication, PMO forums, training curricula and instructional videos.
- Strengthened lessons learned, resource planning, agile collaboration, capability management and post-restructure department integration.
Hervé Teguim
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
Stefan Fröhlich
Last position:
Managing Partner & Co-Founder at IMPLENEX
- Founded, built, and scaled a management consultancy for go-to-market, growth, and digital transformation
- End-to-end brand building: CI/CD, website, and social media presence as a consistent digital footprint
- Built a B2B marketing & sales funnel incl. CRM for structured lead generation
- Developed and built a service portfolio & verticals: including an AI Board for strategic GenAI classification as well as a go-to-market/growth vertical for the food industry
- Built a partner network for co-delivery
- Acquired, onboarded, and delivered consulting engagements
Michael Berninger
Last position:
Senior Product Designer at Awake Mobility GmbH
- Spearheaded efforts to enhance product consistency and achieve significantly better usability, ensuring a more intuitive experience
- Partnered with the founders to define a new go-to-market strategy through product discovery
- Directed the process of creating a new company website from concept and wireframes to design and final implementation in Webflow
- Responsive Webdesign
- WCAG
- Corporate Branding
- Product Discovery
- MVP
- Product Design
- User Experience
- Rapid Prototyping
Sanju Raj Prasad
Last position:
Software Developer at Senior Connect GmbH
- Created complex backend systems (Fastapi Python, GCP cloud functions, APIs, integration tests) using Typescript.
- Worked with firebase and firestore databases, implementing transactional operations, scheduling jobs, and migrations.
- Implemented GCP dashboards for thorough monitoring and custom alerts in case of anomaly traffic.
- Implemented Sentry for better debugging, error tracking and overall monitoring of the Next.js frontend.
- Implemented story tests for UI related testing.
- Implemented Typesense in Python Fastapi backend, for improved text based searching along with typo handlings.
Discover over 15,000 top freelancers
Statistics of experts using Data Visualization
Aggregated from the professional profiles of matched freelancers.
Experience
14 years
Position duration
2.7 years
Positions per freelancer
9
Top business areas
Information Technology, Business Intelligence, Product Development
Top industries
Information Technology, Education, Professional Services
Certification focus areas
Information Technology, Business Intelligence, Product Development
Bachelor's degree or higher
96%
Master's degree or higher
73%
Doctorate
13%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
98%
Based on our profile pool as of 6 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology 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 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 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
What it covers
Data visualization turns data into charts, maps, dashboards, and other visuals people can read quickly. It helps teams spot trends, compare options, and explain results without digging through tables. Strong professionals choose the right chart for the question, not just the prettiest layout.
Common tools
- Tableau for interactive business dashboards and reporting
- Power BI for Microsoft-based analytics and self-service reporting
- Looker and LookML for governed metric layers and KPI views
- D3.js and modern JavaScript for custom web visuals
- Charting in Python and R for analysis, notebooks, and research
Typical work
These specialists build dashboards, executive scorecards, product analytics views, and client-facing reports. They also refine data models, improve filters and drilldowns, and make visuals work on desktop and mobile. In many companies, the job is less about decoration and more about clarity, trust, and decision speed.
When to bring one in
Bring in freelance expertise when reporting is slow, visuals are hard to read, or teams disagree on what the numbers mean. Companies also look for help during BI tool rollouts, dashboard rebuilds, migration from Excel, and custom visualization work for internal apps. This is common in finance, SaaS, retail, logistics, and healthcare.
What good professionals do
Strong professionals ask where the data comes from, who reads the output, and which decision the visual supports. They know data modeling, SQL, UX for analytics, and basic statistics well enough to avoid misleading charts. Good work means clean hierarchy, fast loading, consistent definitions, and visuals that stay useful as data changes.
Working with teams
Many projects start remote because stakeholders can review mockups and data definitions online. On-site work can help when teams need workshops, access to sensitive systems, or closer alignment on business language. In Germany and other multilingual settings, clear English often works for the toolchain, while local business terms matter in the final reports.
Frequently asked questions
Everything clients usually want to know about Data Visualization, in one place.
Data visualization is used to turn complex data into charts, dashboards, and reports people can act on quickly. It helps teams track performance, compare segments, and explain changes without reading raw tables. Good work makes the right pattern obvious fast.
Data Visualization focuses on how information is presented and understood, while BI reporting often includes the wider stack behind it, such as metrics, datasets, and refresh logic. In practice, the two overlap a lot. A strong specialist can work on both the visual layer and the reporting experience.
Data Visualization projects often use Tableau, Power BI, Looker, and D3.js, depending on the use case. Python libraries such as Plotly, Matplotlib, or Seaborn also appear in analysis work. The right choice depends on whether the goal is self-service reporting, embedded analytics, or custom visuals.
A strong Data Visualization professional usually knows SQL, data modeling, dashboard UX, and basic statistics. They should also understand how source systems feed the visuals and where data quality issues can distort the result. For custom work, JavaScript or Python often helps.
Data Visualization work can be simple or highly complex, so the right level depends on the scope. A small dashboard cleanup may need someone with practical tool experience, while a multi-team analytics layer needs deeper skills in modeling, governance, and stakeholder alignment. The key is matching scope to expertise, not just tool names.
Data Visualization work is often done remotely because mockups, data definitions, and dashboard reviews travel well. On-site time can help when a team needs workshops, access to sensitive data, or close work with business users. Many projects work best with a mixed setup.
With Data Visualization, quality shows up in clarity, accuracy, and speed of understanding. The best output answers the business question without clutter, uses the right chart type, and matches the source data exactly. Ask for a clear rationale behind each visual choice, not just a polished screen.
Yes, Data Visualization work can differ by tool because each ecosystem has its own modeling, sharing, and governance style. Tableau often suits exploratory dashboards, Power BI fits Microsoft-heavy environments, and Looker works well with metric definitions tied to the warehouse. A good freelancer should know the tool and the business context behind it.
The average hourly rate of freelancers who have used Data Visualization in their recent projects is 87 €, which corresponds to a daily rate of about 699 € based on an 8-hour working day.
Of the freelancers who have used Data Visualization in their recent projects, 96% hold at least a Bachelor's degree, 73% hold at least a Master's degree, and 13% hold a doctorate.
On average, freelancers who have used Data Visualization in their recent projects have 14 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers who have used Data Visualization in their recent projects are German (98%), English (98%), and French (19%).
The most common industries among freelancers who have used Data Visualization in their recent projects are Information Technology (75%), Education (41%), and Professional Services (38%).
The most common business areas among freelancers who have used Data Visualization in their recent projects are Information Technology (83%), Business Intelligence (73%), and Product Development (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.
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