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UML Experts

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Hire experts who create clear class, sequence, activity, and use case diagrams, align teams on architecture and requirements, and keep documentation useful through delivery. Get fast, precise matching with vetted, available freelancers.

Meet FRATCH Experts who have recently used UML

Verified expert

Onur Kayir

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AI & Automation Consultant · Project Manager for AI Projects

Braunschweig
Onur Kayir

Last position:

Project Manager & Outsourcing Manager at SENEC GmbH (EnBW Group)

  • Setup of a scalable nearshore IT developer hub (Croatia, Czech Republic, Poland) as an independent company through a BOT model (Build – Operate – Transfer)
  • Identification, selection, and management of full-service agencies; introduction of control and governance mechanisms including KPIs, SLAs, and regular service reviews
  • Creation and review of data processing agreements and framework contracts in alignment with Legal & Compliance; integration of regulatory requirements (incl. KRITIS) into process design
  • Consulting on cloud vs. on-premise strategies, data storage, and authorization concepts; support for procurement in vendor selection and provider assessments
  • Change management and process harmonization between internal teams and nearshore partners; reporting to management, CFO, and CIO

Result: Scalable IT developer hub with an audit-proof governance model, reduced operating costs, and faster product development.

Verified expert

Christian Fritsch

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Architecture Management

Waldesch
Christian Fritsch

Last position:

Architecture Management at Agency

  • Expert in the company's architecture management area

  • Support for standardizing the company's IT landscape

  • Further development of architecture management

  • Shaping the company's business architecture

  • Restructuring, administration and maintenance of all IT assets

  • Support in creating a unified software asset management and CMDB

  • Creation of unified document management (e-file)

  • Transition of documents into a central DMS structure

  • Link between architecture management and the department's internal business process management

  • Support in developing strategic and tactical development plans

  • Organizing communication with key stakeholders

  • Support in the conception, organization and coordination of the architecture office to be built up

  • Accompanying and advising the entire architecture management process

  • Advising the company's business units on architectural topics and their framework conditions

  • MS Office, Windows 10, VBA

  • ITIL, TOGAF, PowerBi, Kanban, Scrum

  • Internal agency tools

  • Open Touch Conversation, Webex, wire, bdbos

  • MS Sharepoint, JIRA, Confluence

  • ARIS, Archimate, BPMN

Verified expert

Alwin G.

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Head of IT

Essen
Alwin G.

Last position:

IT Interim Manager & AI Strategist

  • AI product development: Design of an AI-supported GRC platform to automate compliance processes.
  • AI expertise: Strategic deepening in Agentic AI and GenAI as a core asset for modern IT governance
  • IT interim management and strategic consulting
Verified expert

Kathrin Siegmann

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Requirements Engineer | Business Analyst | Agile Coach

Bremen
Kathrin Siegmann

Last position:

Requirements Engineer at Governikus GmbH & Co. KG

  • Analysis, documentation, and alignment of requirements. Conducting stakeholder analyses, interviews, and workshops for requirements gathering and validation. Carrying out requirements reviews and working closely with business units and development teams.

Techniques & tools: requirements engineering, stakeholder management, workshop facilitation, system context modeling, requirements reviews, quality scenarios, Miro, Jira, Confluence

Verified expert

Maciej Sawicki

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Product Owner

Nuremberg
Maciej Sawicki

Last position:

Product Owner at Bundesagentur für Arbeit

  • As part of the project, the further development of the identity management system was driven forward. This included a comprehensive refactoring of the interfaces to the connected target systems. In addition, several special systems were successfully connected to the IAM to ensure end-to-end identity and authorization management.
  • Technical design and solution proposals for IAM system development
  • Requirements analysis and requirements management (IREB, BABOK)
  • Alignment of the strategy with the future target architecture (TOGAF)
  • Prototyping of solutions
  • Documentation of requirements (Innovator)
  • Analysis and documentation of requirements and creation of process models (UML, BPMN, ArchiMate)
  • Modeling of requirements and system functionalities (OOA/OOD, UML)
  • Further development of interfaces (SOAP, REST)
  • Carrying out architecture reviews
Verified expert

Muhammad Tanveer Baig

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Embedded Systems | ADAS | RF Systems | Quantum Optics | R&D and Validation & Integration

Siegen
Muhammad Tanveer Baig

Last position:

Embedded Systems Consultant / Architect | Integration and Validation Engineer / Manager at Ingenieurbüro Baig

  • Led the hardware development and validation of a safety-critical 400 V battery management system (BMS) for the TOGG SUV program; performed system architecture reviews, schematic validations, EMC and reliability tests, and root cause analyses in line with relevant automotive standards (ECE-R10, CISPR25, ISO-26262). Coordinated cross-border EU engineering teams, customer reviews, and technical documentation to deliver a production-ready, validated system.

  • Architected and integrated 22 state-of-the-art ADAS validation vehicles for BMW ADCAM and LIDAR programs at Magna Electronics; synchronized up to 26 heterogeneous sensors (LIDAR, RADAR, cameras, GNSS/INS) using PTP-based timing architectures. Defined the system architecture, HW/SW interfaces for hardware-in-the-loop (HIL) reprocessing, sensor integration strategies, and data acquisition frameworks. This enabled scalable vehicle-level validation, improved validation efficiency by 25%, and reduced project costs by €1.45 million.

  • End-to-end validation and integration of automotive radar platforms for a Daimler project at Continental. Developed automated open-loop hardware-in-the-loop (HIL) environments to accurately test target tracking KPIs, field of view limits, and thermal and voltage-related ECU state machines. Used a highly complex toolchain consisting of CANoe, Lauterbach Trace32, RADAR target simulators, and EMC shielding chambers for RF and system validation. Synchronized global, interdisciplinary teams to speed up troubleshooting and close critical technical gaps.

  • Reconstructed and validated the product architecture of an electromechanical e-bike by integrating and troubleshooting critical subsystems (BMS, motor control, sensors, HMI, electronic locking systems). Built a comprehensive system-level test bench for functional testing, fault reproduction, and performance analysis; coordinated suppliers and implemented corrective actions to improve reliability and traceability.

  • Defined the system architecture and validation strategy for a LIDAR platform developed in cooperation with Elmos Semiconductor; evaluated optical measurement concepts, SPAD detector integration, and system requirements, and created technical recommendations for product development and verification.

  • Developed LabVIEW-based automation and verification software for a high-precision hydraulic and electromechanical test system for FTE Automotive; integrated NI DAQ hardware for high-frequency real-time capture of physical measurement data. Developed automated test sequences, programmable endurance tests, troubleshooting routines, data logging, and analysis tools to improve test efficiency and traceability.

  • Successfully managed complete engineering life cycles for well-known industrial customers (Magna, Continental, Farasis, FTE Automotive, BMW, Daimler, TOGG) – from requirements engineering and proof of concept through system integration and validation to technical documentation, supplier coordination, and user training.

Verified expert

Wolfgang Orgler

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DI

Freilassing
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

Verified expert

Ursula Helfer

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Product Owner | Scrum Master | Finance Expert

Munich
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
Verified expert

Fred Hauschel

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Senior Java Architect and Developer | Domain Architect (DDD, Knowledge Systems)

Munich
Fred Hauschel

Last position:

Software Architect and Developer at Personal project

  • Recurring problem in my own AI-supported projects: requirements analysis, use cases, and architecture decisions can be created quickly with AI support, but they remain hard to trace and are scattered across markdown files – knowledge is lost as soon as it is no longer in the context window. arknet turns requirements engineering and architecture knowledge into structured, testable data instead of plain text: requirements, use cases, and architecture decisions as a consistently linked knowledge graph, traceable from the requirement to the architecture decision – queryable for humans and AI agents alike. Built technically on RDF/OWL and its own MCP server.

  • Result: MCP daemon running, Docker image automatically published on GHCR, nine hexagonal modules, eleven ADRs (including an open-core license model). Requirements engineering and ubiquitous language hexagon active. Publicly available as a Community Edition under Apache-2.0 since 07/2026 (github.com/kogn-io/arknet), together with the Claude Code plugin and the GHCR image; open-core model.

  • Label: Java, Maven, RDF, RDF4J, OWL, SPARQL, Model Context Protocol, Spring AI, Docker, GitHub, Git, Claude Code, Obsidian, DDD, Hexagonal Architecture, ArchUnit, JUnit, AssertJ, interface development, Software Architecture, Continuous Integration, Knowledge Management

Verified expert

Kossi Adjamah

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Project Manager

Frankfurt am Main
Kossi Adjamah

Last position:

Project Manager at Deutsche Bank

  • Migration of the existing Brainloop application to a new infrastructure
  • Managing project activities and stakeholder communication
  • Managing complex relationships with clients, internal departments, IT partners and external contacts
  • Planning and managing project finances, including cost estimates and financial control
  • Initiating and managing projects with third-party solutions, working with procurement
  • Ensuring compliance with project management methods and quality standards
  • Supporting portfolio project delivery processes and regular project status reporting
  • Skills and tools used: communication, reporting, presentation, project management, MS Exchange, MS Outlook
  • Team size: 15 people
Verified expert

Hooman Behmanesh

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Fullstack Developer

Cologne
Hooman Behmanesh

Last position:

Fullstack Developer at Möbel Roller GmbH

  • Further development of the existing e-commerce platform based on SAP Commerce (Hybris) to meet the growing demands of digital commerce.
  • Ensuring the scalability and performance of the backend, so the platform remained stable and efficient even under heavy user load.
  • Development and integration of new OCC REST APIs and services for modular extensions and flexible adjustments, to implement new features quickly.
  • Optimization of data flows and interfaces, which significantly improved platform efficiency and system performance.
  • Ensuring a maintainable and scalable code base by using Clean Code principles, proven design patterns, and a future-proof architecture.
  • Reduction of errors through extensive testing with JUnit, Mockito, and load tests with Gatling, supported by the introduction of automated test processes.
  • Improved system performance through targeted refactoring measures and efficient database queries, especially to handle peak loads.
  • Use of modern cloud and monitoring tools such as Kubernetes, Google Cloud Platform (GCP), and Grafana to ensure a stable and monitored infrastructure.
  • Clear improvement in efficiency, scalability, and reliability of the platform, which now meets the demands of a dynamic and growing e-commerce market.
Verified expert

Goran Popovic

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Test Manager & Analyst

Geisingen
Goran Popovic

Last position:

Test Manager & Analyst at Festo / Questax GmbH

Project goal: Carrying out system tests and validating industrial communication and control systems, including requirements definition and verification.

Responsibilities:

  • Test planning, test execution
  • Test strategy, test cases, and test specifications
  • Requirements analysis
  • Ensuring traceability between requirements, test cases, and defects
  • Carrying out regression and integration tests
  • Defect analysis
  • Simulation and validation
  • NetSniffer Wireshark
  • Supporting test automation (Python, CI/CD)
  • Reporting
  • Stakeholder coordination and agile collaboration (Scrum / SAFe / Kanban)
  • V-Model
  • CI/CD automation with Python, Groovy, and frameworks (Selenium, PyTest)

Technologies:: CAN, Modbus, Ethernet, PLC, PROFINET, Codebeamer ALM, Scrum, SAFe, MS Teams, Git, CI/CD with GitLab CI and TeamCity, Windows Batch, FAS, Wireshark, Python, Enterprise Architect (EA), AI tools (e.g. ChatGPT, Microsoft Copilot), VS Code, Tia Portal, SCL, Python (Selenium, PyTest)

Verified expert

Burhan Dinler

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Experienced IT and AI Architect

Niederkassel
Burhan Dinler

Last position:

Enterprise Architect & Solution Architect at DB Netz AG

With project PRIZMA, DB will modernize its infrastructure on the one hand, and develop a fail-safe IT landscape on the other hand, which can be restored quickly and securely in case of a disaster.

  • Capture current architectures of existing systems as well as methodical consulting and development of target architectures
  • Deepen and maintain the building plan / target IT landscape
  • Implement technical architecture concepts & architecture descriptions
  • Implement migration concepts for updating and further developing the platform and information systems
  • Assess submitted improvement suggestions as part of the project
  • Capability management: identify capability gaps, develop target visions, and support transformation planning within the enterprise architecture.
  • Create a compatibility matrix of the components in use and compare dependencies of specific versions
  • Create an IT concept for extending the platform with the following topics: hardware and software requirements, security, licensing, high availability, load balancing, backup & recovery, update strategy, monitoring integration, etc.
  • Coordinate with business architects as well as technical architects from the cross-functional architecture area of the PRISMA program for the topics (backup, Active Directory, monitoring, Citrix, and business applications ...)
  • Status meetings and alignment of project planning with the Release Train Engineer / Project Manager
  • Advise the Release Train Engineer / Project Manager in identifying project risks
  • Advise the System Architect Engineers in steering the implementation of the concept
  • Implement the IT concept
  • Document the infrastructure

Label: MS Project, LINUX, Windows, ORACLE, Java, REST, SharePoint, Microsoft Exchange, UML, Enterprise Architect, BPMN, AZURE, AWS, V-MODEL, Micro Service, VisualStudio, SAP S/4HANA, SCRUM(SAFE), ESB (TIBCO), Python, Innovator, LeanIX (TOGAF), Ansible, Ansible Tower, Ansible Automation, ROBOT, SpringBoot

Verified expert

Niko Schmuck

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Developing Architect / Solution Architect

Hamburg
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.

Discover over 15,000 top freelancers

Statistics of experts using UML

Aggregated from the professional profiles of matched freelancers.

Experience

23 years

Position duration

5.2 years

Positions per freelancer

16

Top business areas

Information Technology, Product Development, Project Management

Top industries

Information Technology, Banking and Finance, Automotive

Certification focus areas

Information Technology, Project Management, Product Development

Bachelor's degree or higher

92%

Master's degree or higher

65%

Doctorate

8%

Certifications per freelancer

4

Most common languages

German, English, French

Speak two or more languages

97%

Based on our profile pool as of 6 Sep 2026.

Daily rate distribution

0 60 120 180 240
<€400 €400-​800 €800-​1200 €1200-​1600 €1600+

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 UML

Rates are based on recent contracts and do not include FRATCH margin.

1000
750
500
250
Rate comparison chart
Daily rate avg. 806 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

1000
750
500
250
Rate comparison chart
Median rate 800 €

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 UML covers

UML, the Unified Modeling Language, is a standard for describing software and system structure with diagrams. It helps teams explain requirements, behavior, interfaces, and relationships before code is written. Strong UML work makes complex systems easier to discuss, review, and maintain.

Common diagram work

  • Use case diagrams for scope and actors
  • Class diagrams for domain models and relationships
  • Sequence diagrams for flows and interactions
  • Activity diagrams for business and process logic
  • State diagrams for lifecycle behavior

Where it fits

UML appears in product design, enterprise architecture, integration work, and legacy system documentation. It is useful when many teams need the same picture of how a system works. In Germany and other international teams, it also supports structured handovers when business and technical groups work together.

Tooling and standards

Professionals often work with PlantUML, Visual Paradigm, StarUML, Enterprise Architect, and other modeling tools. They know when to keep diagrams lightweight and when to model details that reduce risk. Good UML specialists can also translate between diagrams, written requirements, and code structures.

When companies bring in help

Companies usually seek freelance UML experts when documentation is unclear, a redesign is underway, or teams need a shared model for a new platform or integration. They are also useful for audits, migrations, and stakeholder workshops. The best specialists turn messy ideas into diagrams people can actually use.

What strong specialists deliver

  • Clear diagrams that match the real system
  • Consistent naming across models and code
  • Practical guidance on what to model and what to leave out
  • Better alignment between product, engineering, and business teams
  • Documentation that stays readable after delivery
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Frequently asked questions

What clients ask us most about UML — answered in short.

UML is used to describe structure and behavior in software and system projects. Teams use it to clarify requirements, show interactions, map domain models, and document designs that need to be reviewed by both technical and non-technical people.

Unified Modeling Language is more structured than a sketch or a free-form document. It is useful when the team needs diagrams that stay consistent across reviews, handovers, and implementation, while a quick sketch is often enough for a small or early discussion.

A strong UML specialist usually understands system analysis, software architecture, requirements work, and basic domain modeling. Familiarity with tools like PlantUML or Enterprise Architect helps, but the real value is the ability to turn complex ideas into clear, accurate models.

The right level depends on the scope. A small set of diagrams for a feature can be handled by a capable specialist with solid modeling habits, while an enterprise model, migration, or architecture review needs someone who can keep many views consistent and useful.

Bring in UML help when the internal team is busy, the design is disputed, or the current documentation no longer matches the system. Freelance support also works well for short discovery phases, workshops, and cleanup work on old diagrams.

Yes, when it is used with care. UML is not for every note or feature, but it is very useful for interfaces, complex flows, legacy systems, and designs that many people need to understand in the same way.

Most UML work can be done remotely because the output is diagrams, notes, and reviews. On-site sessions can help when teams need live workshops, domain interviews, or fast alignment across product, engineering, and operations.

Look for diagrams that are easy to read, consistent, and tied to real decisions. Good UML work uses the right diagram type, avoids clutter, and shows that the specialist understands both the system and the audience for the diagram.

The average hourly rate of freelancers who have used UML in their recent projects is 101 €, which corresponds to a daily rate of about 806 € based on an 8-hour working day.

Of the freelancers who have used UML in their recent projects, 92% hold at least a Bachelor's degree, 65% hold at least a Master's degree, and 8% hold a doctorate.

On average, freelancers who have used UML in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 5.2 years.

The most common languages among freelancers who have used UML in their recent projects are German (100%), English (95%), and French (23%).

The most common industries among freelancers who have used UML in their recent projects are Information Technology (91%), Banking and Finance (52%), and Automotive (51%).

The most common business areas among freelancers who have used UML in their recent projects are Information Technology (98%), Product Development (88%), and Project Management (79%).

Main locations of FRATCH Experts, who have recently used UML

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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FRATCH CEO avatar

Philipp Thomaschewski

FRATCH CEO

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