WSDL Experts in Cologne
matched in minutes from over 15,000 CVs with the power of AI.Hire experts who design XML-based service contracts, integrate legacy SOAP web services, and resolve schema validation errors in complex enterprise environments. Our AI-driven platform connects your business with vetted, available freelance professionals in Cologne who ensure seamless system interoperability.
Meet FRATCH Experts in Cologne, who have recently used WSDL
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.
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
Michael Kunz
Last position:
Enterprise Architect, Lead Architect of the transformation program and coach at Swiss Ministry
- Development of the overall architecture
- Support for the respective workstreams in developing architectures in the areas of infrastructure, data centers, security, and network topology
- Coordination of the architect pool
- Support for program management in building the transformation project based on agile methods
- Consideration of regulatory requirements for IT projects in the federal administration
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
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
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
Discover over 15,000 top freelancers
Statistics of experts using WSDL
Aggregated from the professional profiles of matched freelancers.
Experience
29 years
Position duration
1.7 years
Positions per freelancer
28
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Transportation, Automotive
Certification focus areas
Information Technology, Human Resources, Operations
Bachelor's degree or higher
100%
Master's degree or higher
75%
Doctorate
25%
Certifications per freelancer
2
Most common languages
German, English, Latin
Speak two or more languages
83%
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 WSDL
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
Understanding XML Web Service Contracts
Web Services Description Language is the XML-based standard used to define the interface and mechanics of SOAP-based web services. It details the exact format of messages, operations, and network protocols required to communicate with a specific service. Enterprise systems rely on these strict contracts to exchange structured business data across disparate platforms.
Core Applications of Service Descriptions
- Defining communication protocols and message formats for legacy enterprise applications.
- Enabling secure machine-to-machine communication in banking and logistics systems.
- Creating clear endpoints for business process automation and middleware routing.
- Generating client-side stubs and server-side skeletons in Java, C#, or PHP.
Associated Technologies and Frameworks
Working with service descriptions requires deep familiarity with XML Schema Definition, SOAP, and UDDI. Specialists utilize tools like SoapUI, Apache CXF, and Eclipse to validate, test, and generate code from these documents. They understand how to translate abstract definitions into concrete bindings like HTTP or JMS to ensure reliable data transmission between internal and external partners.
Accessing On-Demand Integration Skills in Cologne
Many logistics, chemical, and media companies in Cologne operate legacy systems that depend on stable service descriptions. Local organizations hire external professionals to manage the migration or expansion of these systems without disrupting daily operations. Having an experienced specialist working hybrid in Cologne ensures that complex interfaces are correctly mapped and tested against local data security standards.
Expected Project Deliverables
A qualified professional delivers fully validated XML-based contracts that serve as a single source of truth for your development teams. They resolve compatibility issues between different software versions, optimize message schemas to reduce payload size, and document complex endpoints. Their work minimizes communication errors and accelerates the integration of new business partners into your existing network.
Qualifying the Right Specialist
A strong candidate demonstrates deep knowledge of enterprise application integration patterns and XML namespaces. They quickly identify structural inconsistencies in service definitions that cause communication failures between systems. Look for professionals who combine technical precision with clear communication, as they must bridge the gap between different development teams to align interface specifications.
Frequently asked questions
Curious about WSDL? Here are the answers that come up again and again.
A WSDL specialist designs, documents, and maintains the XML-based contracts that define how web services communicate. They ensure that SOAP APIs have clear interfaces, correct data types, and proper binding details so different systems can exchange information without errors.
While REST relies on HTTP methods and JSON, Web Services Description Language is used exclusively with SOAP-based services using XML. It provides a strict, machine-readable contract that defines every operation, making it highly suitable for enterprise environments where data structure compliance is critical.
In Cologne, sectors such as insurance, logistics, and traditional manufacturing frequently rely on WSDL to manage legacy system integrations. Many established enterprises in the Rhineland region use these service descriptions to connect internal databases with secure, external partner networks.
Yes, most configuration and contract design work can be done remotely, though some Cologne companies prefer hybrid arrangements. Having the WSDL specialist attend key architecture alignment meetings on-site in Cologne can streamline the initial integration phase.
A competent professional working with WSDL must be highly skilled in XML, XML Schema Definition, and SOAP. They also need experience with integration tools like SoapUI and enterprise frameworks such as Apache CXF or Spring Web Services.
Legacy interface design requires highly specialized knowledge that internal teams might not use daily. Bringing in an external WSDL expert ensures that your integration project is structured correctly from the start, avoiding costly troubleshooting down the line.
Experts use specialized tools like SoapUI to run mock services and validate incoming requests against the WSDL schema. This ensures that the service contract behaves exactly as defined before any backend code is written.
While technical specifications and WSDL documents are written in English, local communication expectations vary. For projects in Cologne, professionals who can communicate fluently in German are often preferred to facilitate discussions between local business units and technical teams.
The average hourly rate of freelancers in Cologne, Germany who have used WSDL in their recent projects is 106 €, which corresponds to a daily rate of about 844 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used WSDL in their recent projects, 100% hold at least a Bachelor's degree, 75% hold at least a Master's degree, and 25% hold a doctorate.
On average, freelancers in Cologne, Germany who have used WSDL in their recent projects have 29 years of professional experience, with a single engagement typically lasting around 1.7 years.
The most common languages among freelancers in Cologne, Germany who have used WSDL in their recent projects are German (100%), English (83%), and Latin (33%).
The most common industries among freelancers in Cologne, Germany who have used WSDL in their recent projects are Information Technology (100%), Transportation (83%), and Automotive (67%).
The most common business areas among freelancers in Cologne, Germany who have used WSDL in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (100%).
Main locations of FRATCH Experts, who have recently used WSDL
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.
Countries:
Berlin Hamburg Munich 
Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
