XML Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used XML
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.
Henning Uiterwyk
Last position:
Senior Expert Data Governance, Master Data Quality and Data Migration at E.ON
- Planning and implementation of a migration strategy for master and transaction data for the continuous loading of a cloud-independent database
- Creation and pilot implementation of a company-wide Business Data Model for customers, suppliers, contracts, products, prices, consumption, invoices, and dunning
- Concept and consulting for a Data Governance Framework incl. definition of committees, roles, processes, and metadata model
- Operationalization of the Data Governance Framework with definition of data standards
- Sub-project management in two pilot projects (PoCs) for Data Governance systems (ErwinDIS and Atlan)
- Training and coaching the data team in migration, data quality, and data modeling
Peter Schordie
Last position:
SAP FI/CO/PSM consulting at Federal agency
- SAP ERP/ECC, SAP S/4 HANA
- Analysis and documentation of customizing for SAP FI/CO, PSM, PSCD
- Analysis, consulting, and documentation of S/4 HANA apps for defining and executing statutory reports
- Clarification of prerequisites for using the S/4 HANA apps to define and execute statutory reports
- Analysis and documentation of customizing for in-house developments
- Consulting on integration of SAP FI/CO as well as PSM, PSM-FM (budget management), contract accounts receivable and payable (PSCD)
- Consulting and documentation of customizing adjustments in SAP FI/CO, PSM, PSM-FM, PSCD for the introduction of new company codes and other organizational structures
- Consulting and documentation of necessary process adjustments
Rainer Langbehn
Last position:
Senior IT Consultant, Senior Software Architect, Senior Software Developer, Senior DevOps Engineer at Techniker Krankenkasse
Automation of the database major / minor releases for the TKeasy project
Concept for database major / minor release automation
As-is analysis
Evaluation of Redgate Flyway functionality
Concept creation
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Skills: Docker, Continuous Delivery, Continuous Integration, Redgate Flyway, Major Releases, Minor Releases
Stefan Marx
Last position:
Bundesrechtsanwaltskammer
- Design, planning and execution of complex acceptance tests for a document exchange platform for the German justice authorities.
- Validation of decrypted and certificate-based message exchange via web platform, mobile app, and Java API.
- Documentation of test cases, execution steps, and test results.
- Technologies: Windows 11/10, Ubuntu, iOS, Android, Bash for Windows, Java 17, IntelliJ, Git, Jira, Confluence, Citrix Server, xJustiz standard implementation, specific justice software.
Joaquim Landa Miala
Last position:
Freelance ABAP Developer, Logistics at Cheplapharm
- Tested integration of TIBCO EBX with SAP S/4HANA via TIBCO BusinessWorks – proof of concept
- Implemented use case: communication between TIBCO EBX and SAP S/4HANA via IDocs to exchange material master data and business partner data
- Customized, configured, and implemented inbound and outbound processing in the SAP S/4HANA environment for communication with the TIBCO EBX software interface
- Distributed classes, characteristics, and values between TIBCO BusinessWorks and SAP S/4HANA and customized the inbound processing
- Documented the technical components
Stanislaus Stelle
Last position:
Security Consultant at Rohde & Schwarz AG at Star Labs GmbH
- Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
- Developed and audited Linux drivers
- Collaborated using GitLab, Gerrit, Confluence and Jira
- Technologies: C, C++, Secure Boot
Alexander Rautzenberg
Last position:
Business Analyst at Financial Services Provider Landesbank
The Helaba ATLAS project aims to modernize core systems and make them future-proof. As part of the subproject, the existing legacy system for international payments is being replaced by a modern web-based application.
- Analysis of functional and technical requirements
- Analysis and optimization of business processes
- Process modeling
- Preparation and facilitation of workshops
- Defining project scope and prioritizing requirements
- Business process management (analysis, modeling, and optimization)
- Specification of user stories
- Designing business and authorization concepts
- Testing and acceptance
- Designing mockups in Figma
- Creating the UI/UX style guide for web applications Approach: Scrum (agile) Technologies: Jira, Confluence, MS Teams, Conceptboard, Java, Vaadin, Figma
Jens Hagemeyer-Lee
Last position:
#52 Test Manager in Safety-Critical Infrastructure at Telecommunications Company
- Network elements, network, operational and operator-related systems
- Supporting around 20 different products (managed agile)
- Requirements analysis and management (functional and non-functional)
- Test concept and planning (scope, test phases, effort, schedule, resources, organization, etc.)
- Aligning approach with clients and service providers
- Managing and assisting in creation of test cases for system, integration and end-to-end tests
- Guiding and supporting test execution
- Defect management and planning bug fixes with external providers
- Preparing and facilitating workshops
- Regular reporting and creating automated test reports
- Further development of agile testing methodology and configuration of supporting tools
- Conceptual support in developing a quality seal for rating product and service quality of internal and external providers
- Requirements engineering based on ISO/IEC 25010, Scrum, SaFE
- BMC Remedy, Atlassian Confluence, Atlassian Jira (including plugins Xray, Structure), Microsoft Office (incl. Visio), Obsidian, doxis document management system, Gitlab, Obsidian
Manuel Schneider
Last position:
Project Manager at Univention
Industry: digital sovereignty, public sector
Content:
- Project steering (teams: consulting, development, testing, deployment/operations)
Products and standards:
- Jira, Confluence, Asana, Miro, Mural
- Open Source, Keycloak, Open Xchange, ownCloud
Kai Birkenbusch
Last position:
Freelance CPQ Consultant (Full-Time) at Freelance CPQ Consultant
- Independent CPQ consulting for a portfolio of industrial manufacturers, including Scheidt & Bachmann, Trützschler Group SE, and Weiss Klimatechnik GmbH (Schunk Group)
- Full project coverage: requirements analysis, concept, system design, implementation, testing, and international go-live support
- Deep integration work with SAP ECC (material master replication, SD document creation, material creation, general APICONNECT and other web service interfaces)
- Process consulting: analysis and optimization of internal quoting processes for sales and management
- Knowledge transfer/coaching and pair programming to strengthen internal team skills
René Karges
Last position:
Freelancer at Freelance work
- Business analysis
- Requirements management
- Project management
- Stakeholder management
- Team leadership
Jeanne Yap
Last position:
Process Engineering Intern at Procter & Gamble
- Independently initiated and deployed automated validation workflows using Python, cutting manual processing by 58% and improving efficiency
- Developed a machine learning model for synthetic defect generation, reducing downtime and production costs; deployed locally and via Databricks and Azure AI Factory
- Utilized a small dataset of image data from the production lines and extended this dataset with training on models like cycleGAN and pix2pix
- Built and optimized the Linux-based development environment for training 3D models; maintained reproducibility via GitHub
- Presented technical insights to cross-functional teams (engineers, QA, project managers), ensuring alignment of ML solutions with operational needs
Vladimir Maznicenko
Last position:
Developer at Financial services provider
- Support and further development of a framework for developing applications in a banking association: DynS/OSPE
- Migration of the framework to Java 11 and Java 17
- Java8, Java11 and Java17, Spring, Spring-Batch, Spring WebServices, Spring-Security, Spring-Data, JPA, Hibernate, OpenSource libraries etc.
- XML, JAXB, JSON, REST and SOAP services, DB2, Oracle, WebSphere or Liberty AS, FreeMaker, Junit, mock libraries, JaCoCo, Maven, IntelliJ, Eclipse, GitHub, SVN, Jira
Louis Nguenkam
Last position:
Specialist in Adobe Experience Manager & Microservices at Nguenkam Consulting & Engineering
Java 11/21
Springboot
Swagger/OpenApi
Azure Pipelines
Trivy Integration
Apache Sling
OSGI
Java Content Repository (JCR)
Apache Jackrabbit Oak
Adobe HTL
GraphQL
Maven
GitLab
IntelliJ
Azure Cloud
Azure DevOps
Terraform
AEM specialist in the Scrum team
Development and deployment of microservices via Open API interfaces
Operation of microservices in the Azure Cloud
Implementation of AEM modules and integration with microservices
Member of the knowledge transfer team and a backend coordination team
Discover over 15,000 top freelancers
Statistics of experts using XML
Aggregated from the professional profiles of matched freelancers.
Experience
23 years (Germany: 24 years)
Position duration
3.3 years (Germany: 5.2 years)
Positions per freelancer
17
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Transportation
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
95% (Germany: 88%)
Master's degree or higher
63% (Germany: 54%)
Doctorate
5% (Germany: 9%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
92% (Germany: 97%)
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 Cologne 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 Cologne using XML
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
What XML is for
XML, or Extensible Markup Language, is used to structure data in a way systems can read and validate. It fits document formats, configuration files, feed exchange, and long-lived integration interfaces where predictable structure matters.
Common deliverables
- XML schemas for validation and contracts
- XSLT transformations for publishing and migration
- SOAP and message payloads for system integration
- Content feeds for catalogs, manuals, and product data
- Export and import formats for enterprise tools
Ecosystem around XML
Strong XML work often includes XSD, XSLT, XPath, SAX, DOM, and schema-aware editors. In larger stacks, specialists also work with SOAP, WSDL, RSS, Atom, and tooling inside Java, .NET, or content management systems.
When companies bring in specialists
Teams usually look for freelance XML experts when a schema is unstable, a transformation keeps breaking, or a legacy interface must stay in service. This is common in publishing, retail, logistics, public sector systems, and Cologne companies that still connect older and newer platforms.
What strong professionals do well
Good XML specialists keep structures strict, names consistent, and validation rules clear. They know how to read messy source data, design maintainable schemas, and make transformations easy to test. They also document edge cases so other specialists can extend the work without guessing.
Working with local teams
In Cologne, XML work is often collaborative across product, integration, and content teams. Some projects need on-site workshops for interface mapping, while others run smoothly remotely if sample files, schemas, and test cases are available. Clear communication matters as much as syntax.
Frequently asked questions
Before you brief your next project: the most common questions about XML.
XML is used to structure and exchange data when validation and predictable formatting matter. Companies rely on it for configuration, content delivery, product feeds, document workflows, and system-to-system interfaces. It is especially useful when the data must stay readable for both people and software over time.
XML is stronger when you need namespaces, mixed content, or formal schema validation with XSD. JSON is usually lighter for simple API payloads, but XML is still common in enterprise integration, publishing, and older interfaces. The better choice depends on the structure, tooling, and partner systems involved.
A strong XML specialist usually knows XSD, XPath, and XSLT, plus schema design and data validation. Experience with SOAP, WSDL, SAX, and DOM is often useful in enterprise projects. The best professionals also understand the source systems, not just the markup.
For a simple file format or a one-off conversion, basic XML knowledge may be enough. For shared schemas, long-lived integrations, or complex transformations, you need someone who can design for maintainability and error handling. The more systems depend on the format, the more valuable strong expertise becomes.
Hire an XML freelancer when the work is specialized, time-sensitive, or tied to a legacy interface your team does not touch every day. Freelance specialists are also useful for schema cleanup, transformation fixes, migration work, and integration support. They can step in without a long ramp-up.
Yes, most XML work can be done remotely if the freelancer has access to sample files, schemas, and test environments. Cologne teams may still prefer on-site sessions for interface mapping, stakeholder workshops, or legacy system reviews. A mix of remote delivery and focused in-person meetings often works well.
Look for clear schemas, consistent naming, and transformations that are easy to test and maintain. Good XML work should validate cleanly, handle edge cases, and match the receiving system exactly. Documentation matters too, because future specialists need to understand the structure quickly.
Yes, XML remains important in many enterprise, publishing, and public-sector environments. It is still the standard format for many feeds, document workflows, and SOAP-based integrations. Even when newer formats are used elsewhere, XML often stays at the center of legacy compatibility.
The average hourly rate of freelancers in Cologne, Germany who have used XML in their recent projects is 102 €, which corresponds to a daily rate of about 815 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used XML in their recent projects, 95% hold at least a Bachelor's degree, 63% hold at least a Master's degree, and 5% hold a doctorate.
On average, freelancers in Cologne, Germany who have used XML in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 3.3 years.
The most common languages among freelancers in Cologne, Germany who have used XML in their recent projects are German (100%), English (92%), and French (27%).
The most common industries among freelancers in Cologne, Germany who have used XML in their recent projects are Information Technology (100%), Banking and Finance (58%), and Transportation (54%).
The most common business areas among freelancers in Cologne, Germany who have used XML in their recent projects are Information Technology (100%), Product Development (88%), and Quality Assurance (62%).
Main locations of FRATCH Experts, who have recently used XML
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 
Frankfurt 
Stuttgart 
Dusseldorf 
Leipzig 
Dortmund 
Essen 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
