DMN Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used DMN
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
Ron Speckmann
Last position:
AI System Architect & Developer at ConteQ AI
- Development of a SaaS application for automated claims handling with AI agents (LLM) as the primary development team
- Design & testing of efficient and secure context management setups in the development process (including multi-sub-agent use, memory systems, caching)
- Definition and implementation of LLMOps pipelines with Azure AI Foundry for AI agents in customer contact (including versioning, logging, audit trail, security tests)
- Infrastructure provisioning via IaC (Bicep), application configuration via GitOps-based CI/CD pipelines (rules engine, workflow engine)
- Development of integrated security architecture designs between AI-based & classic applications with a special focus on regulatory requirements
- Integration of workflow and rules engine in a NestJS service architecture — for automated, rule-based control of claims processes
- Probabilistic extraction and preparation of claims data as the basis for rule-based, deterministic decision logic — traceable, auditable, and regulatorily compliant
Alexander Schulze
Last position:
AI Consultant for AI Voice Bot System at Rudolf Hörmann GmbH & Co.KG
- Consultant for system architecture, AI agents & integration, coach for data & process logic, Graph-RAG approaches, security and data protection.
- On-premise AI solutions with high compliance and performance requirements.
- Architecture decisions, operational setup, strategic prioritization & deployment.
- Technologies: LiveKit JS SDK, LiveKit Agents, Web Audio API, JS, AudioWorklet, Loki, vLLM, Zscaler, Docker, Neo4j, MySQL, Python.
- Models: GPT-OSS 20B, Whisper large v3 turbo, Qwen3-TTS.
Antje Baumann
Last position:
AI Strategy Consultant, Change Manager at SMEs (various marketing boutiques, IT & office services)
AI Strategy & Enablement for SMEs Management consulting – SMEs (e.g. marketing boutique, IT & office services)
Concept and delivery of structured AI introduction and strategy workshops for small and medium-sized businesses. Result: Practical AI status assessment, prioritized use case list, and management decision template as the basis for the next steps in the company’s AI development.
Activities
- Needs analysis and individual preparation of the consulting formats
- Facilitation of a structured AI status assessment including vision, mission, and target picture
- Identification and prioritization of relevant AI use cases and action fields
- Creation of management decision templates and roadmaps
- Raising awareness for opportunities, risks, and success factors of AI introduction
- Support for first customers with AI-supported automation scenarios
- Supporting people and teams through the change process of AI introduction (CM)
Methods / Tools / Technologies
Methods:
- AI status assessment & use case analysis
- Workshop moderation / facilitation
- Requirement Management
- Change Management (PROSCI)
Tools:
- Generative AI tools (e.g. ChatGPT, Claude)
- Automation/AI coding tools (e.g. n8n, Claude Code, Visual Studio, Antigravity)
Technologies:
- Prompt engineering
- AI workflow automation
Wolfgang Tomaschek
Last position:
Overall Project Manager at itzbund
Project content: The use of “Generative Pretrained Transformer” technologies (GPT) will massively change the world of work in the coming years. ITZBund is developing a base service for this, which can be used by its 200 customers. This base service is offered as an on-prem and a cloud variant. Started in 12/23, from 05/24 productive systems (based on MVP) could already be rolled out and operated successfully for several agencies and federal ministries.
Project metrics:
- Budget in 2024 approx. €20M
- approx. 70 people in the core project context
- regular (indirect) contact with approx. 80 people in the wider project environment
My main tasks:
- Overall responsible external project manager
- Project definition phase/project setup and establishment of the project organization
- Strategic and operational project planning, as well as shaping and ongoing adjustments of the project
- Ongoing coordination with project owners and stakeholders in ITZBund
- Ongoing coordination with subproject managers, agile roles and other project staff
- Responsibility for project controlling, quality management, risk management and change management
- Responsibility for providing the base service on on-prem and cloud environments and its continuous development
- Planning and leading several hypercare phases
- Collaboration and ongoing coordination with a partner project of a federal ministry and provision of an MVP
- Coordination with agile teams
- Coordination with operations, release and deployment
- Responsibility for the implementation of the first customer projects
- Responsibility for creating an AI governance
- Ensuring accessibility (BITV)
- Responsibility for setting up a subproject for marketing activities
- Support in building an efficient proposal process
- Stakeholder management
Methodology:
- V-Model XT ITZBund
- Scrum
Tools used:
- Microsoft Office, Skype, MS Project, Confluence, Jira, SharePoint, Miro
Will Orrantia
Last position:
Solution Architect at Stuttgart Police Authority
Designing the migration strategy for WLS applications to the BKA cloud and Stack IT
Creating a hybrid cloud for internal testing and development with Kubernetes
Transforming the IT landscape from a legacy monolithic architecture to a cloud-based architecture
Integrating new CI/CD processes using Azure Pipelines
Quadrupled the throughput of personnel security checks
Migrated personnel security clearance applications to Docker-based applications
Built CI/deploy pipelines with Azure DevOps
Environment: Java Spring Boot, Kubernetes, Oracle WebLogic, OpenID, Camunda, JUnit, TOGAF
Selvaraj Kannaiyan
Last position:
Senior Full Stack & Cloud Architect at HCLTech
- Led end-to-end implementation of the Miles and More Credit Card Service integrating with TSYS systems on Microsoft Azure
- Architected secure, scalable APIs and microservices using Spring Boot, Camunda, and Apache Kafka (Confluent Platform) for real-time event streaming and process automation on Azure Kubernetes Service
- Managed full development lifecycle of the credit card system on Azure Cloud including fraud detection, payment processing, account management, and Kafka-based event-driven data pipelines
- Designed and implemented Kafka Connect integrations and Schema Registry for seamless data flow between microservices and legacy systems
- Introduced Agile best practices, improving team efficiency by 30% and reducing project delivery time
- Directed and mentored a team of 15+ developers fostering a collaborative, cloud-first, and innovation-driven culture
- Managed client relationships achieving 95% satisfaction and securing follow-up projects through consistent delivery excellence
- Designed and deployed BPMN/DMN models in Camunda for complex business workflows and automation
- Configured Camunda Engine with advanced features such as error handling, RPA integration, and multi-version deployments
- Integrated Camunda and Kafka-based messaging with core banking systems ensuring high availability and data consistency
- Managed multi-database schema configurations on Azure and optimized system performance for high throughput and fault tolerance
- Designed and implemented cloud architecture patterns on Azure focusing on multi-region resilience, data sovereignty, and event-driven scalability for critical financial workloads
Hüseyin Korkut
Last position:
Senior Full-Stack Engineer at DVAG
Architecture and implementation of a fully digitalized closing flow for managing securities contracts within the DVAG infrastructure. The platform aims for maximum user-friendliness, modular extensibility and compliant handling of sensitive data.
Implementation of a reactive UI structure with a focus on user guidance & accessibility.
Dynamic control of form and closing processes including validation logic.
Reactive state management via SignalStore (signals + selective effects).
UX optimization through adaptive components and Playwright-based UI tests.
Backend modularization to connect existing sales and contract logic.
API stability and DTO design according to Clean Architecture principles.
Collaboration with domain teams to define technical contracts and service boundaries.
Management with GitHub.
Unit tests with Jest, E2E tests with Playwright.
Code reviews, CI-integrated test execution, iterative refactorings.
Ensuring high coverage and UI stability in the closing flow.
Technologies: Angular 18, RxJS, SignalStore, HTML5, SCSS, Spring Boot, Kotlin, REST, OAuth2, Jest, Playwright, Clean Architecture.
Matthias Lang
Last position:
Typescript Fullstack Engineer at Card Complete / Bank Austria
- Designed and developed the "Credit Risk Engine" using Camunda, Node.js and Typescript
- Greenfield project for credit card credit assessment for existing and new customers, including EBA KPIs, SCHUFA and CRIF scorings
- Built and modeled workflows (BPMN) and decision logic (DMN) with Camunda Modeler in close collaboration with stakeholders
- Implemented service tasks, user tasks and jobs with Nest.js, Node.js and Typescript, including exception handling
- Backend-for-Frontend (BFF), frontend with React, Tailwind and Ant Design UI library
- CI/CD with GitLab, Kubernetes/Rancher
Mohamed Keita
Last position:
Interim Senior Camunda & BPMN Consultant, Spring Boot & Java Backend Developer at GEMA/IT4IPM GmbH
- Subject matter expert for the client on modeling and developing Camunda BPMN 2.0
- Development of new features and APIs, and coordination of tasks
- Design and development of RESTful APIs with Swagger (code first)
- Creation of target designs, high-level concepts, and requirement specifications
- Analysis and evaluation of alternative solution approaches
- Integration of external IT systems (ANUBIS, SES, ZPS) via Google GCP Pub/Sub and RESTful web services
- Pair programming, code reviews, and collaboration with API product owners
- Consulting on transforming legacy BPMN workflows and configuring Camunda BPM
- BPMN and DMN modeling and implementation in short iterations
- Operational support, bug fixing, and knowledge documentation
- Use of TDD, static code analysis with SonarQube, and integration tests
- Automation of test cases in Java and analysis of stack traces/logs on GCP-PROD
- Identification and execution of test data and documentation of test results
Andreas Lietschulte
Last position:
Founder at Genloop
- Development of an Eclipse-based UML modeling and code generation platform
Discover over 15,000 top freelancers
Statistics of experts using DMN
Aggregated from the professional profiles of matched freelancers.
Experience
20 years
Position duration
2.1 years
Positions per freelancer
14
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
80%
Master's degree or higher
60%
Certifications per freelancer
4
Most common languages
German, English, Spanish
Speak two or more languages
91%
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 Germany 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 Germany using DMN
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
Decision logic
DMN, short for Decision Model and Notation, is used to make business decisions explicit and repeatable. It fits approval rules, eligibility checks, pricing logic, and policy-driven outcomes that should stay separate from process flow.
What they build
DMN specialists turn rule-heavy work into clear decision models that business and technical teams can review together.
- Decision tables for approvals, scoring, and routing
- Decision requirement diagrams that show dependencies
- Rule sets linked to BPMN or case management flows
- Testable decision logic that reduces hard-coded rules
Tools and ecosystems
Strong DMN work often sits next to BPMN, CMMN, and rule engines such as Camunda, Red Hat Decision Manager, or other workflow suites that support the standard. The best experts know how to keep decisions portable, readable, and aligned with process design.
When to bring in help
Companies usually bring in freelance DMN expertise when rules are growing fast, when different teams define decisions in different ways, or when old logic is buried in application code. In Germany, this is common in regulated and process-heavy environments where clear documentation and auditability matter.
What strong experts do
A strong DMN professional understands both business rules and system design. They can translate policy into decision tables, spot overlapping rules, handle hit policies correctly, and test edge cases before the model goes live.
Good fit signals
- Your approvals or pricing logic changes often
- Teams disagree on how a decision should be made
- Decision logic is mixed into process or application code
- You need clean handover, documentation, and maintainable models
Frequently asked questions
Quick answers to the questions that come up most around DMN.
DMN is used to model business decisions in a clear, testable way. Companies use it for approvals, eligibility, pricing, exception handling, and routing rules that should not be hidden inside process code.
DMN focuses on the decision itself, while BPMN focuses on the process flow around it. A strong setup often uses both: BPMN orchestrates the work, and DMN decides what should happen at key steps.
Choose DMN when the decision logic changes often, needs business review, or must be documented clearly. Custom code can work for small rule sets, but it becomes harder to maintain when policies grow or need frequent updates.
A good DMN specialist usually understands BPMN, rule modeling, and basic process analysis. Experience with platforms such as Camunda or Red Hat Decision Manager helps, especially when decisions must run inside a larger workflow.
A DMN freelancer should get the business goal, the decision inputs and outputs, known exceptions, and any current rules or documents. With that, they can often start by cleaning up one decision area and then expand the model in steps.
Yes, DMN work is often done remotely, especially for modeling, workshops, and reviews. For teams in Germany, remote collaboration usually works well if the specialist can align with business owners, process teams, and any required German-language documentation.
Look for clear decision tables, correct use of hit policies, clean dependencies, and models that match the real business rule. Good DMN work is easy to read, easy to test, and easy for non-technical stakeholders to validate.
Poor DMN models often create overlapping rules, unclear ownership, and decisions that nobody trusts. That usually leads to rework, hidden exceptions, or models that look formal but still do not reflect how the business really decides.
The average hourly rate of freelancers in Germany who have used DMN in their recent projects is 98 €, which corresponds to a daily rate of about 783 € based on an 8-hour working day.
Of the freelancers in Germany who have used DMN in their recent projects, 80% hold at least a Bachelor's degree and 60% hold at least a Master's degree.
On average, freelancers in Germany who have used DMN in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Germany who have used DMN in their recent projects are German (100%), English (82%), and Spanish (18%).
The most common industries among freelancers in Germany who have used DMN in their recent projects are Information Technology (100%), Banking and Finance (82%), and Automotive (55%).
The most common business areas among freelancers in Germany who have used DMN in their recent projects are Information Technology (100%), Product Development (100%), and Business Intelligence (82%).
Main locations of FRATCH Experts, who have recently used DMN
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 Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
