UML Experts in Berlin
, matched in minutes with vetted and available freelancersHire experts who turn complex requirements into precise UML models, architecture views and process diagrams, while connecting business and technical teams. FRATCH uses fast, precise AI matching to help you find vetted, available freelancers for your project.
Meet FRATCH Experts in Berlin, who have recently used UML
Giovanni L.
Last position:
Solution Architect at Nordea Bank
Consumer Cards Solution Architect
- Provided architectural leadership in Consumer Cards Domain establishing best practices and improving architectural transparency and maintainability by designing a structured documentation framework to enable reverse engineering of legacy card systems.
- Standardized architectural artefacts including BIAN Business Capabilities, UML diagrams in draw.io format (Use Case, Component, Sequence), naming conventions, document repository, design templates and blueprints, microservices.
- Produced high-level and low-level designs aligned with enterprise architecture governance processes and artefact standards.
- Provided architectural support to the Strategic Card Simplification Programme, focusing on card product migrations and application decommissioning across all countries. Agile environments (Scrum/SAFe).
- Analysed and designed AI use cases in the architecture domain.
Project: Payment Card Industry Data Security Standards (PCI DSS) Strategic Programme
- Analysed and documented existing data flows across card products and geographic regions to assess PCI DSS compliance.
- Identified areas involving sensitive data at rest and data in motion requiring encryption or masking, ensuring adherence to PCI DSS requirements.
- Collaborated with security, infrastructure, and application teams to align encryption strategies with regulatory and organizational policies.
- Provided strategic advisory services on data strategy, data governance, data management, data quality, data architecture, data mesh, MEGA HOPEX, DAMA-DMBOK, event-driven architecture, end-to-end data flows and card product harmonization models.
- Ensured solution design alignment with regulatory compliance (BCBS 239, DORA, GDPR) and internal policies.
Project: Denmark ATM Outsourcing Project
Objective: Outsource ATM operations and maintenance to a third-party provider while expanding the Denmark ATM fleet, with Nordea retaining ownership of ATMs and cash for the existing and extended infrastructure.
- Led a cross-functional delivery team (project management, business analysis, and architecture) and documented the as-is ATM ecosystem architecture, including end-to-end data flows, integrations, and internal/external application interfaces.
- Designed end-to-end processes for authorization, reconciliation, and settlement, aligning operating model, controls, and compliance requirements across Nordea and the outsourced service provider.
- Produced high-level and low-level solution designs using standardized UML artefacts (Use Case, Component, and Sequence diagrams) to support vendor onboarding, integration planning, and implementation.
- Ensured architectural alignment and decision-making across enterprise stakeholders and third-party providers, managing dependencies and interfaces in the context of the outsourcing initiative.
Ola V.
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Mohsin H.
Last position:
BBM GenAI MiDAS program coordinator for Bosch eBike at Robert Bosch GmbH
The MiDAS program aims to integrate Generative AI across the entire BBM organization. My role is to enable the eBike division to adopt and leverage Generative AI by collaborating closely with the MiDAS team in India.
Management:
- Enable the eBike division to adopt GenAI through tailored solutions.
- Collaborate with the MiDAS team in India to design solutions for Generative AI use cases specific to the eBike division.
- Coordinate with the eBike teams to integrate GenAI systems, tools, plugins, and services provided by the MiDAS team.
- Plan roadmaps with eBike and MiDAS India team Product Managers for the delivery and integration of Generative AI solutions.
Daria B.
Last position:
Senior Consultant Strategy, Risk & Resilience Management at Antharas
- Creating guidelines
- Conducting Business Impact Analyses (BIA), assessing risks, and identifying time-critical business processes
- Process management
- Creating emergency plans and crisis management plans, including cyber response and IT emergency plans with special consideration of a cyberattack
- Conducting awareness trainings
- Planning and carrying out tests and exercises
- Developing tailor-made solutions to reduce risks and ensure business continuity
Toralf C.
Last position:
IT Consultant in PKI Software Development at BWI
- Implementation of a full-stack application with Angular as the frontend framework and Java as the backend language
- Use of the Swagger OpenAPI specification for REST communication between the frontend and backend applications
- Control of a card printer via the Nexus Card SDK framework
- Design and implementation of card management software with a web interface and a JavaFX module for printer monitoring
- Use of Cucumber tests for test automation and creation of test artifacts to test outside the development environment
- Use of Wireshark for network investigations to analyze the API of a third-party product and to monitor the REST API of the self-developed software
Markus M.
Last position:
Business Analyst and Project Manager at Sachsenlotto GmbH
- Business analysis of the instant win games segment (financial, IT landscape, organization, customers)
- Gap analysis and resulting requirements, project planning, milestone planning, stakeholder management, risk analysis, project documentation, playbooks
- Successful establishment of sales activities and processes for instant win games
Nino S.
Last position:
Freelancer in Data Science at International Companies
Proceeding what was started in 10/2023, offering data science development skills fulltime to international clients
Helping companies learn more about their existing (unstructured) data, optimize processes and technical systems, and derive solutions for their problems
Tools and technology used: Python (sklearn, pandas, numpy, Django, sqlAlchemy, pyTorch), Matlab, Docker, AWS EC2, Lambda, S3, SQL, MySQL, Hadoop & Spark, Machine Learning, DNN, AI, Jira, Confluence, Git, CI/CD, GitLab, Jenkins
Qaiser A.
Last position:
Freelance Lead DevOps Engineer at Schwarz Gruppe Produktion
Bootstrapping a CloudOps team and building a multi-cloud provider backend for a low-code Internal Developer Platform (IDP) with env zero
Introducing user story mapping, ADRs, milestones, and backlog management
Designing and developing core APIs, setting up CI/CD pipelines, OpenTofu/Terraform scripts
Representing and communicating the team with third-party stakeholders (e.g. env zero)
(Cross-)team coaching on DevOps, software design, Terraform, Golang, and agile practices
Igor K.
Last position:
Freelance Software Developer
Christian G.
Last position:
Product Owner – Redesign of an iOS and Android SaaS application platform at iApps Technologies GmbH
- Led the redesign of an iOS and Android B2B SaaS solution.
- Developed the product vision and strategy and designed the platform architecture.
- Worked closely with cross-functional teams to create a user-centered, forward-looking product.
- Identified market trends and analyzed feedback from stakeholders and customers.
- Developed a well-thought-out feature set.
- Led the product design and development process.
- Created Balsamiq wireframes.
- Conducted comprehensive market and competitor analysis.
- Defined the product roadmap and feature scope, managed and prioritized the backlog.
- Crafted and wrote epics and user stories.
- Briefed UI designers and reviewed and approved Figma layouts.
Hendrik W.
Last position:
Software Test and Maintenance Support at Anton Paar ProveTec GmbH
- Add/create test specifications
- Conduct regression tests
- Conduct release tests
- Analyze Jira tickets
- Identify software defects and fix them with C#
Kiran D.
Last position:
AI Engineering at Masterschool
- Fundamentals of AI and LLMs
- Build and deploy AI powered implementations with ChatGPT and Gemini
Beserithan M.
Last position:
SD Development and CRM Interaction Center Development at Sanner GmbH
- Part-time 2-3 days/week
- Developments in the SD module and CRM Interaction Center
- Consulting, customizing in SD module
- Adapting Fiori applications in the SD module
- Approval workflow for credit memos: design, concept, implementation, customizing
- Credit memo request: object type BUS 2094
- If the credit memo request value is below a certain threshold -> automatic release and removal of billing block
- If the credit memo request value is above a certain threshold -> automatic determination of the responsible employee
- The employee receives a work item in their integrated inbox or in My Inbox (Fiori) -> the employee can reject, approve, or edit the credit memo request
- UML modeling in technical documentation
- Creating a Z-table for customer sample line items
- Merging COA1 (delivery) + COA2 (CAQ) forms and adding to the spool request as a single PDF
- Correcting workflow title according to NACE, fixing message "ZBMA title is displayed incorrectly in SBWP (Workplace)"
- Receiving PLM documents from an external PLM system, creating an RFC function module, storing PLM documents in the material master as GOS objects
- On releasing a production order, reading PLM documents from MM and saving them in a shared folder for the MES system
- Displaying the number of inspection methods in a popup when creating an order -> VA01/VA02
- Automatic stock reconciliation LVS IDOC INVCON
- Performing AQUA tests
- IDOC archiving for old IDOCs
- NL_PM_drawings and storing print output, informing MES via ZPPORDER IDOC, writing technical documents
- Using SD user exits, BADIs for various requirements
- Extending screens for customer requests via screen exits
- Creating message types for sales orders, purchase orders, and invoices
- Extending CRM Interaction Center Business Partner -> Overview -> Contract with customer-specific requirements
- New Fiori application departure control with data from Z-table and standard equipment tables, displaying a pie chart, calculating "vehicles in operation"
- Extending Interaction Center Business Partner -> Overview -> new tab on Overview Page with list tables for performance feedback, attachments from GOS objects
- Extending Interaction Center Business Partner -> Overview -> new tab on Overview Page with list tables for PM quality notifications, attachments from GOS objects
- Implementing BADIs in CRM
- File storage on SAP server/UNIX server
- Using BOL/GENIL architecture in CRM development
- Project language: German
Peter K.
Last position:
Hardware and Software Developer / Project Manager at Anonymer Kunde
- Development of control units for the automotive industry incl. embedded software
- CAN bus, Vector Tools, CANoe
- Support of the development process according to ISO 26262
- Ensuring cyber security standards:
- Key exchange (PKI) between vehicle and control units
- Hardware Security Module (HSM)
- Communication with external service providers (international)
- Development (PCB) of measuring adapters, statistical analysis of sensors
- IoT and embedded software development, backend administration
Paulo A.
Last position:
Founder and Product Lead at Muvuca Solutions
- Lead a climate tech consultancy end to end, coordinating cross-functional teams, owning client strategy and project management, and delivering ESG strategies and AI-first products.
- Stay hands-on across discovery, analytics, roadmapping, architecture, and QA to safeguard execution quality.
- Designed, developed, and launched Jody, an AI travel planner (demo credentials provided).
Discover over 15,000 top freelancers
Statistics of experts using UML
Aggregated from the professional profiles of matched freelancers.
Experience
22 years (Germany: 23 years)
Position duration
2.7 years (Germany: 5.2 years)
Positions per freelancer
18 (Germany: 16)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Professional Services, Energy
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
100% (Germany: 92%)
Master's degree or higher
74% (Germany: 65%)
Doctorate
21% (Germany: 8%)
Certifications per freelancer
2 (Germany: 4)
Most common languages
German, English, Spanish
Speak two or more languages
96% (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 Berlin 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 Berlin using UML
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.
UML 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 (96%)
- Professional Services (54%)
- Energy (50%)
- Government and Administration (50%)
- Manufacturing (46%)
- Education (42%)
- Healthcare (42%)
- Automotive (35%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What UML does
UML, or Unified Modeling Language, is a visual standard for describing software systems, business processes and technical structures. It gives teams a shared way to explore requirements, interfaces, data relationships, behavior and deployment before implementation begins. UML models can support both early planning and ongoing documentation.
Core diagram types
UML covers different views of the same system. Class and object diagrams describe structure, while use case, activity and sequence diagrams clarify behavior and interactions. State machine, component and deployment diagrams help explain lifecycle rules, dependencies and the environments in which services run.
Tools and standards
Professionals work with UML through modeling suites, diagram editors and repositories that support versioning and team review. Common environments include Enterprise Architect, Visual Paradigm, Sparx Systems tools, IBM Rational tools and web-based diagramming applications. Strong practice also includes applying OMG specifications consistently and connecting models with requirements or architecture documentation.
Where companies use it
UML is useful when systems have many stakeholders, integrations or long-lived design decisions. Typical assignments include:
- Mapping domains, interfaces and service boundaries
- Modeling workflows, user interactions and business rules
- Documenting legacy systems before migration
- Describing embedded, regulated or distributed systems
- Aligning product, engineering and operations teams
When freelance expertise helps
Companies often bring in freelance UML specialists during discovery, modernization, platform transitions or architecture reviews. Berlin teams may need someone who can work closely with local stakeholders on-site or collaborate remotely across international delivery groups. Clear English communication, and German where required by the project, can make model reviews more effective.
Signs of strong professionals
A capable UML professional does more than produce attractive diagrams. They choose the right level of detail, challenge unclear assumptions and keep models aligned with working requirements. Look for experience with:
- Translating business language into testable system behavior
- Selecting diagrams that answer a specific decision
- Explaining trade-offs to technical and non-technical audiences
- Maintaining traceability as requirements change
- Connecting UML with agile delivery and architecture practice
Frequently asked questions
Not sure where to start with UML? These answers cover the essentials.
UML is used to visualize structure, behavior, interactions and deployment decisions. It helps teams clarify requirements, compare design options, document existing systems and communicate decisions before or during implementation.
Unified Modeling Language is broad and suited to software structure and behavior, while BPMN focuses on business process flow and SysML extends modeling for complex systems and physical components. Informal diagrams are faster for quick conversations, but UML provides more defined notation and consistency when documentation must be reviewed or maintained.
A strong UML specialist usually understands requirements engineering, software architecture, domain modeling and API or integration design. Knowledge of agile delivery, BPMN, SysML, database concepts and modeling tools can also be valuable, depending on the project.
The right level depends on the scope and risk of the assignment. A focused diagram update may need strong notation and domain understanding, while a system-wide model requires professionals who can lead workshops, resolve ambiguity and maintain consistency across many views.
UML work is often well suited to remote collaboration because models, requirements and review comments can be shared digitally. On-site workshops in Berlin can still help when stakeholders need intensive discovery, whiteboarding or alignment across business and technical teams.
Review whether each diagram answers a clear question and uses notation consistently. Good UML models have an appropriate level of detail, explain dependencies and behavior without unnecessary decoration, and remain traceable to requirements or architectural decisions.
UML can support agile work when teams create only the models needed for current decisions and update them as the system changes. Sequence, component, deployment and state diagrams can clarify service interactions, events and operational dependencies without requiring a large fixed documentation package.
A UML professional should clarify the business goal, intended audience, system boundary, existing documentation, toolchain and review process. They should also agree on the notation profile, level of detail and how the models will be maintained after delivery.
The average hourly rate of freelancers in Berlin, Germany who have used UML in their recent projects is 98 €, which corresponds to a daily rate of about 784 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used UML in their recent projects, 100% hold at least a Bachelor's degree, 74% hold at least a Master's degree, and 21% hold a doctorate.
On average, freelancers in Berlin, Germany who have used UML in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 2.7 years.
The most common languages among freelancers in Berlin, Germany who have used UML in their recent projects are German (96%), English (92%), and Spanish (15%).
The most common industries among freelancers in Berlin, Germany who have used UML in their recent projects are Information Technology (96%), Professional Services (54%), and Energy (50%).
The most common business areas among freelancers in Berlin, Germany who have used UML in their recent projects are Information Technology (100%), Product Development (88%), and Project Management (88%).
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.
Hamburg 
Munich 
Cologne 
Frankfurt 
Stuttgart 
Dusseldorf 
Dortmund 
Essen 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
