SOAP Experts in Cologne
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Meet FRATCH Experts in Cologne, who have recently used SOAP
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.
Hamdi Rajab
Last position:
Full-Stack AI Developer at Karray-Pflege GmbH
PFS-Matching-App
- Integrated an intelligent LLM chatbot using LangChain4j, enabling conversational AI, context-aware question answering, document summarization, and autonomous tool execution.
- Implemented Retrieval-Augmented Generation (RAG), prompt engineering, and AI agent workflows to connect large language models with enterprise data and backend services.
- Developed RESTful APIs and secure backend services to support AI-driven interactions and business processes
Yaroslav Shargorodskiy
Last position:
Senior Low-Code Consultant at Freelancer
Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix
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
Armen Markarian
Last position:
CTO/CPO Platform & Technology at Green Mobility Holding
- Overall responsibility for platform transformation across ERP, CRM, PIM, and AI-driven process automation
- ERP transformation: Implementing and migrating to Microsoft Dynamics 365 Business Central
- CRM & growth stack: Implementing HubSpot as the central CRM and a platform for lead and marketing automation
- Product data & commerce enablement: Introducing an ePIM to scale category management and digital commerce processes
- AI-driven process automation: Designing and implementing agent-based AI workflows to automate processes in business services, accounting, tender management, and marketing
- Building a scalable platform organization including product development, DevOps, UX, cloud engineering, and corporate IT
- Implementing modern product and portfolio governance (e.g., OKRs, portfolio boards, value-based roadmaps) to manage technology-driven initiatives
- Harmonizing heterogeneous system landscapes and transforming them into a modular, scalable platform architecture (ERP, CRM, PIM, integrated customer journeys)
- Coaching and developing product owners, tech leads, delivery managers, and UX teams to build a scalable product organization
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
Jannik Jespers
Last position:
Freelance Salesforce Consultant & Developer at Self-employed
- Consulting and delivery of over 30 Salesforce projects (Sales Cloud, Service Cloud, Experience Cloud, Pardot, Marketing Cloud)
- Designing and setting up CRM architectures including requirements management, data modeling, and automation
- Implementing custom solutions (Apex, LWC, Flows, integrations)
- Developing interfaces with ERP, DMS, and email systems (SAP, Microsoft Dynamics, DocuWare, etc.)
- Introducing agile project methods (Scrum, Kanban) in client projects
- Coaching in-house Salesforce teams (admin and dev training)
Daniel Langemann
Last position:
Developer / Software Architect at rffl.io
- PHP 8.4
- Platform for sweepstakes: API-first approach with Symfony/API Platform
- API Platform 4.2 (REST, JWT, Doctrine/PostgreSQL, API documentation) plus AWS tools
- Symfony 7.3 for infrastructure, hosting, and subsequent operation on AWS with ECS
- Postgres
- AWS RDS, SQS, Fargate, RDS Postgres database, and AWS SQS message queue
- Managing infrastructure with Terraform
- After successfully implementing Terraform, the GmbH was founded as the next organizational step
Andreas Kosubek
Last position:
Backend Developer at Univention GmbH
- Developed a SCIM-compliant Python interface to connect external systems
- Expanded and enhanced UCS modules in Python
- Extended and newly developed Helm charts for container orchestration in Kubernetes
- Maintained and further developed CI/CD pipelines in GitLab
- Implemented automated tests with Pytest and Playwright
'Nubus' is based on a microservice architecture, relies on open source technologies, and runs in Docker containers.
UCS is an IAM complete solution based on Debian, used as an alternative to Microsoft's Active Directory. The work was characterized by the close integration of infrastructure and application logic.
Jacqueline Haefke
Last position:
Kitchen Appliance Manufacturer
Setting up and enhancing an international subscription management system
Migrating and decommissioning a Hybris-SAP system and integrating Zuora
Implementing numerous interfaces to various systems (external and internal)
Setting up and improving monitoring with Grafana, Prometheus, and Databricks
Introducing logging with Loki
Implementing business requirements using jQuery, Thymeleaf, Spring Boot, Java, Go, and Python
Adjusting and extending the GitLab CI pipelines
Setting up and extending infrastructure as code with Terraform and ArgoCD on AWS
Setting up and running E2E and performance tests
Expanding the Databricks business intelligence solution to provide various KPIs
Responsibilities: Architecture, DevOps, development, unit tests, coaching employees and apprentices, E2E, smoke, and integration tests, agile methods consulting (Kanban, Scrum)
Technologies and methods: Java, Go, Kotlin, Node.js, Spring Boot, SOAP/REST, Quarkus, Thymeleaf, Vaadin, Slack, Jira, Confluence, IntelliJ, GitLab, SQS, Kafka, AWS, Kubernetes, Terraform, Maven, Gradle, GitLab CI, Databricks
Fabian Kramer
Last position:
Managing Partner at FK Solution Design GmbH
- Founded FK Solution Design GmbH and acts as managing partner.
- Optimizes existing system landscapes, reduces data silos, and connects software systems.
- Enables more efficient data usage and reduces process lead time.
Robert Meixner
Last position:
Air traffic tax German Customs Administration SOAP Webservices Client Requests at Team GmbH
In the citizens' and business customer portal of the Customs Administration, airlines submit applications for departures and landings every month
These applications are forwarded to the caseworkers via SOAP web service and, after review and processing, any queries or notifications are returned via SOAP web service
PL/SQL programming of SOAP webservices client requests for HTTP/XML message exchange between the BuG portal and the caseworkers
New creation and change requests for Forms and Reports 12 modules
Forms applications start and read SOAP webservice requests via PL/SQL packages, process them and send Reports 12 documents to the airlines
Discover over 15,000 top freelancers
Statistics of experts using SOAP
Aggregated from the professional profiles of matched freelancers.
Experience
19 years (Germany: 20 years)
Position duration
3.3 years (Germany: 2.9 years)
Positions per freelancer
13 (Germany: 14)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Government and Administration, Automotive
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
92% (Germany: 93%)
Master's degree or higher
69% (Germany: 54%)
Doctorate
8%
Certifications per freelancer
3
Most common languages
German, English, French
Speak two or more languages
89% (Germany: 95%)
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 SOAP
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
SOAP basics
SOAP, or Simple Object Access Protocol, is a strict XML-based protocol for exchanging messages between systems. It is common in enterprise software where contracts, message structure, and predictable behavior matter. Teams use it for service calls that must stay stable across long-lived systems.
Where it fits
SOAP is often found in banking, insurance, logistics, public-sector systems, and other environments with older integration layers. It works well when teams need clear service definitions and stronger governance than a loose ad hoc API setup.
Typical deliverables
- WSDL service definitions and endpoint contracts
- Request and response message design
- SOAP integration with existing Java, .NET, or PHP systems
- WS-Security setup, certificates, and authentication flows
- Troubleshooting for failed exchanges and schema mismatches
Tooling and standards
Strong specialists working with SOAP usually know WSDL, XSD, XML namespaces, and related WS-* standards. They may also work with Apache CXF, JAX-WS, Spring Web Services, or .NET tooling, depending on the stack. Good work depends on precise schema handling and clear contract versioning.
When companies need help
Companies bring in freelance SOAP experts when an integration fails, a legacy service must be updated, or a new system must connect to an older one. In Cologne, this often means working with teams that support corporate IT, regulated workflows, or cross-system process automation. Remote work is common, but on-site sessions can help with access, security reviews, and stakeholder alignment.
What strong experts deliver
A strong SOAP specialist reads service contracts carefully, spots breaking changes early, and knows how to trace XML payloads through the full call chain. They can explain faults clearly, keep message formats consistent, and work with both technical and business teams. Good experts leave behind stable interfaces, cleaner documentation, and fewer surprises in production.
Frequently asked questions
Curious about SOAP? Here are the answers that come up again and again.
SOAP is used for structured system-to-system communication, especially where contracts must stay stable over time. It is common for payment flows, customer data exchange, order processing, and other backend integrations that rely on XML messages and formal service definitions.
SOAP focuses on a strict protocol, a defined contract, and a standardized XML message format. REST is usually lighter and easier for simple web APIs, while SOAP is often chosen when governance, formal validation, and WS-* features matter more.
A company should bring in a SOAP specialist when an integration is failing, a legacy service needs maintenance, or a new system must connect to an existing contract-based interface. This is also useful when security headers, certificates, or schema validation are causing delays.
A strong SOAP expert often knows WSDL, XSD, XML, namespaces, and WS-Security. Depending on the stack, they may also work with Java, .NET, Apache CXF, JAX-WS, or Spring Web Services.
Some SOAP work can be done fully remote, especially service debugging, contract review, and code changes. On-site collaboration in Cologne can help when access to internal systems, security checks, or business workshops are easier in person.
A good SOAP specialist explains service contracts clearly, writes clean WSDL and schema changes, and handles faults without guesswork. Look for careful versioning, solid XML handling, and practical experience with authentication and message tracing.
SOAP can still be the right choice when a system needs strict contracts, enterprise security features, or compatibility with an existing service landscape. It is less attractive for simple public APIs, but it remains useful in many internal and regulated environments.
Before starting a SOAP project, freelancers should understand the service contract, the surrounding systems, and any security or compliance constraints. They also need to be comfortable reading XML payloads, testing fault responses, and working with older tooling when the stack is not modern.
The average hourly rate of freelancers in Cologne, Germany who have used SOAP in their recent projects is 97 €, which corresponds to a daily rate of about 773 € based on an 8-hour working day.
Of the freelancers in Cologne, Germany who have used SOAP in their recent projects, 92% hold at least a Bachelor's degree, 69% hold at least a Master's degree, and 8% hold a doctorate.
On average, freelancers in Cologne, Germany who have used SOAP in their recent projects have 19 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 SOAP in their recent projects are German (100%), English (89%), and French (16%).
The most common industries among freelancers in Cologne, Germany who have used SOAP in their recent projects are Information Technology (89%), Government and Administration (42%), and Automotive (37%).
The most common business areas among freelancers in Cologne, Germany who have used SOAP in their recent projects are Information Technology (100%), Product Development (89%), and Quality Assurance (79%).
Main locations of FRATCH Experts, who have recently used SOAP
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 
Essen Request a free demo
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Philipp Thomaschewski
FRATCH CEO
