SOAP Experts in Dusseldorf
from over 15,000 CVs with the power of AIWork with specialists who integrate enterprise Web Services, build robust WSDL contracts, and modernize legacy systems. Matched precisely to your technical requirements with vetted, available freelancers.
Meet FRATCH Experts in Dusseldorf, who have recently used SOAP
Marijn S.
Last position:
Senior Software Engineer at Puls Security GmbH
Optimizing and acceleraÂtion of our Gitlab CI pipeline
Conceptual work for the PoC of the Zero Trust system
Extension of the policy-engine backend in Go
Extension of the policy-testing mechanism in Python
Architectural design of the PEP component of Zero Trust
Documentation of the product
Technologies: Zero Trust, Go, Python, Gitlab CI, Docker, JWT, Domain-Driven Design
Anupriya P.
Last position:
Senior Software Engineer at Telefonica Germany
(Maternity/Parental Leave: July 2023 – Aug 2024)
- Domain: Payment Domain | Client: Telefonica Germany
- Project: General Payment Service
The General Payment Service is responsible for processing of online payments via external payment service provider like Safer pay and PayPal
- Developed Design of Use (DOU) and interface contract documentation, ensuring clarity and compliance across system integrations
- Designed and delivered REST/SOAP web services with Spring Boot and Spring Data JPA, publishing Swagger contracts through WSO2 API Gateway to improve accessibility and governance.
- Spearheaded the on-premises to AWS Cloud migration, re-platforming from Oracle to PostgreSQL on AWS RDS and deploying services on EC2, improving scalability and cost efficiency.
- Containerized microservices using Docker and orchestrated deployments with Kubernetes, streamlining deployment pipelines and improving system reliability.
- Implemented proactive monitoring and logging via AWS CloudWatch and Kibana, ensuring stability and performance during cutover.
- Enhanced collaboration through code reviews and peer reviews, promoting maintainability and clean coding standards.
- Strengthened quality by writing comprehensive JUnit tests and preparing detailed test cases enabling early defect detection
- Delivered automated API testing with Ready API, Postman, and SOAPUI, and conducted performance testing with JMeter, ensuring reliability in high-transaction environments.
Thorsten L.
Last position:
Senior Security Analyst
- Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
- System analysis
- Threat modeling
- Decision-making on vulnerability mitigation strategies
- Implementation of vulnerability detection mechanisms
- Security scans
- DevSecOps practices
- Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
- Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL
Klajdo F.
Last position:
Independent Product Developer / Software Architect at rastr.eu
- Architected and deployed a live B2B geocoding and demographic-data platform for Germany, combining address lookup with census-based population statistics through a web application and REST API.
Stanislaus S.
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
René T.
Last position:
Managing Director at Le Shop Vegan
- Shop & ERP system, performance marketing
- Fulfilment: setup & operation of warehouse & shipping
- Finance: control & liquidity planning
Daniel U.
Last position:
Senior Application Packaging & Deployment Engineer at Allevio AG (Client: Allianz Technology)
- Enterprise application packaging and deployment for Allianz's global Windows migration programs across Europe, North America, and APAC
- Migrated hundreds of enterprise applications from Windows 10 VDI to Microsoft Azure Windows 365 (Windows 11)
- Created software packages in MSI/MST, FlexApp, PSADT 3/4, and App-V according to enterprise packaging standards
- Developed an ASP.NET packaging automation platform with MongoDB, SQL Server, SharePoint, and Outlook integration
- Built PowerShell modules for automated quality checks of MSI and FlexApp packages
- Developed a release conflict detection module in PowerShell to identify potential deployment issues before production
- Created WDAC monitoring scripts for automated policy oversight and incident response
- Implemented MSGraph API calls in PowerShell for Azure AD and Intune operations
- Created Citrix oData scripts for historical usage analysis (BYOD, VDI, fat clients)
- Developed an Intune Win32 app 'Do Not Disturb' deployment routine for an optimal user experience
- First point of contact for troubleshooting production incidents with packaged applications
- Coordinated application owner, UAT, and release testing for hundreds of deployments
- Administered Microsoft Intune, Citrix environments, and SQL Server security
- Created and tested WDAC policies in Intune; managed configuration policies and Win32 app deployments
- Primary packaging resource for Allianz France since 2019
Dmitry T.
Last position:
Web Software Engineer at Freelancer
Third-side integration development (REST: Amazon, OpenAI, Etsy, Shopware, Prestashop, etc)
Performance optimization (Refactoring, SQL analysis)
LMS development and deployment (Moodle)
Cloud deployment automation (Amazon, Azure, Gitlab CI/CD, Docker)
Backend and Frontend development (Laravel, VueJs)
Collaboration with partner-developers (national and international)
Shirtigo GmbH
GRELLARTIG Digital GmbH
velpTEC edutainment GmbH
Sebastian C.
Last position:
Public institution responsible for educational institutions in NRW
- Consulting on processes and execution of load tests, performance tests and technical tests of various applications: web portal, file cloud, email, video conferencing, learning/course platform
- Creating the load test framework
- Programming test scripts (JMeter, Selenium)
- Developing batches to support the evaluation
- Executing load tests and evaluating results, including clear reporting, recommendations for action, and bottleneck analysis
- Managing tasks and collaboration to achieve meaningful load test results
Dalia C.
Last position:
Oracle Developer at Freelance
- Design and implementation of an OCI-based data warehouse and ETL system to replace legacy mainframe applications
- Developed a database optimization strategy and planned the rapid conversion of JCL and COBOL routines to PL/SQL using AI
- Developed an Oracle Apex-based app for internal administrative processes in the public sector (office equipment, staff training)
- Implemented PL/SQL workflows for approval processes and created a responsive mobile version with JavaScript and CSS
- Used Azure DevOps for backlog management and documentation, and Git for version control
- Developed REST interfaces to CRM systems
- Replaced and reprogrammed Oracle Forms screens with Oracle Apex and updated to the latest Apex versions
- Designed a Git branching strategy and conducted code reviews
- Maintained and further developed an EDI-based data exchange system based on Oracle Advanced Queuing for the public sector in Austria
- Performed data analysis and created charts in the Oracle Apex frontend; installed standalone ORDS and Apex 23.1
- Worked agile using the Spotify model; developed complex Apex pages with support from Oracle JET
- Rebuilt and customized existing PL/SQL packages, created workarounds for database version differences, and optimized queries
- Developed Apex applications for broker pools to manage and optimize Oracle databases in the banking environment, including SSO-based authorization systems with OAuth2 and Keycloak
- Built extensive Oracle Apex applications for BI and data mining modernization projects and developed manual and automated projection methods in the frontend
- Carried out data warehousing projects in the banking sector and used Scrum and Kanban in team projects
Jacqueline H.
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
Daniel M.
- SaaS including subscription management and mobile app
Sara S.
Last position:
Senior Software Developer with a Focus on UI/UX at vGen GmbH
Development of an interactive prototype for the concept of an AI-supported Enterprise Architecture Management tool. The goal was to present complex relationships between IT systems, business processes, and departments in a way that is easy to understand and to support decision-making in the context of IT transformations.
The prototype combined data-driven analyses with guided questions and interactive visualizations. A central part was the integration of a RAG process to provide domain-specific EAM knowledge in context. The focus was on quick idea validation, user-centered interaction design, and the technical feasibility of a scalable overall concept.
Design, implementation, and validation of a RAG process for domain-specific EAM knowledge with Python, LangChain, and graph/vector databases (Neo4J, Milvus)
Business and technical requirements analysis as well as definition of an MVP
Development of the architecture and technology concept using Angular, Spring Boot, GraphQL, and Kubernetes
Design of an interaction concept and creation of a brand style guide with Figma
Development of interactive prototypes with Angular, Konva.js, and TypeScript
Integration of CI/CD processes with GitLab CI/CD
Discover over 15,000 top freelancers
Statistics of experts using SOAP
Aggregated from the professional profiles of matched freelancers.
Experience
17 years (Germany: 20 years)
Position duration
2.8 years (Germany: 2.9 years)
Positions per freelancer
11 (Germany: 14)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Manufacturing
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
91% (Germany: 93%)
Master's degree or higher
64% (Germany: 55%)
Doctorate
27% (Germany: 9%)
Certifications per freelancer
13 (Germany: 3)
Most common languages
German, English, French
Speak two or more languages
100% (Germany: 95%)
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 Dusseldorf 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 Dusseldorf 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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
SOAP 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 (92%)
- Banking and Finance (54%)
- Manufacturing (54%)
- Retail (46%)
- Telecommunication (46%)
- Education (38%)
- Government and Administration (38%)
- Automotive (31%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Enterprise Web Services and Protocol Standards
SOAP, originally known as Simple Object Access Protocol, remains a fundamental standard for exchanging structured information across distributed systems. It relies on XML-based messaging layered over application protocols like HTTP or SMTP. In corporate environments across Dusseldorf and the wider North Rhine-Westphalia area, organizations rely on it for secure, auditable transactions.
Core Protocol Ecosystem and Specifications
- Web Services Description Language files defining strict interface contracts
- WS-Security configurations providing message-level encryption and signing
- WS-Addressing and WS-ReliableMessaging handling state and guaranteed delivery
- XML Schema definitions enforcing rigorous payload validation
- Tooling such as Apache CXF, SoapUI, and enterprise ESB platforms
When Organizations Require Freelance Specialists
Companies hire external professionals when integrating core banking, telecom, or insurance platforms that mandate strict message contracts. Freelance specialists resolve complex namespace conflicts, refactor legacy integrations, and implement robust envelope structures. They also build middleware bridges between older backends and modern microservice architectures without breaking operational continuity.
Typical Deliverables in Contract Projects
- Writing and refactoring production WSDL documents and XSD schemas
- Implementing message encryption, digital signatures, and SAML token authentication
- Constructing automated test suites with SoapUI and Postman
- Creating facade layers to translate between XML protocols and JSON-based endpoints
- Debugging faulty envelope payloads and resolving serialization bottlenecks
Regional Industry Context in Dusseldorf
As a hub for telecommunications, corporate logistics, and financial services, the local corporate market maintains deep integration with mission-critical systems. Many organizations in the region manage on-premises mainframes and ERP suites that require continuous interoperability. Freelancers support both hybrid on-site workshops and remote technical delivery to meet strict enterprise standards.
Attributes of Senior Protocol Specialists
Top specialists demonstrate a granular understanding of XML serialization, transport bindings, and enterprise security specifications. They understand fault handling semantics, HTTP transport headers, and connection pooling within high-throughput environments. Their experience ensures that integrations operate reliably under heavy concurrent traffic while meeting corporate governance rules.
Frequently asked questions
Curious about SOAP? Here are the answers that come up again and again.
Organizations use SOAP to enable formal, contract-driven communication between critical business applications. Its built-in support for WS-Security and strict data schemas makes it standard for financial clearing, insurance claims, and government data interchange.
While REST utilizes lightweight JSON over standard HTTP methods, Simple Object Access Protocol enforces a formal XML contract via WSDL. This makes it preferable for operations demanding strict type safety, guaranteed message delivery, and end-to-end security across intermediate network hops.
A capable SOAP expert possesses strong competencies in Java, .NET, or enterprise ESBs like MuleSoft or Apache Camel. They also master XML Schema Definition, XPath querying, and testing suites such as SoapUI.
Refactoring enterprise Web Services generally demands senior-level experience because legacy platforms involve intricate business logic and legacy endpoints. Specialists must understand how to trace broken XML payloads without disrupting active downstream clients.
Yes, specialists frequently design facade layers that wrap existing SOAP endpoints and expose clean REST or GraphQL APIs. This technique allows companies to modernize user interfaces and mobile clients without having to re-engineer dependable legacy core logic.
Many specialists in the Dusseldorf region offer flexible hybrid collaboration models. This setup allows them to attend on-site architecture workshops or security reviews locally while carrying out integration engineering remotely.
For corporate environments in Germany, documentation for SOAP interfaces is often drafted in English, but stakeholder alignment frequently occurs in German. Bilingual fluency in German and English ensures seamless technical communication across local departments.
High-quality SOAP Web Services feature well-versioned WSDL contracts, strict namespace segregation, and modular XSD files. Evaluators should check whether automated schema validations and comprehensive error-handling envelopes are implemented correctly.
The average hourly rate of freelancers in Dusseldorf, Germany who have used SOAP in their recent projects is 96 €, which corresponds to a daily rate of about 764 € based on an 8-hour working day.
Of the freelancers in Dusseldorf, Germany who have used SOAP in their recent projects, 91% hold at least a Bachelor's degree, 64% hold at least a Master's degree, and 27% hold a doctorate.
On average, freelancers in Dusseldorf, Germany who have used SOAP in their recent projects have 17 years of professional experience, with a single engagement typically lasting around 2.8 years.
The most common languages among freelancers in Dusseldorf, Germany who have used SOAP in their recent projects are German (100%), English (100%), and French (38%).
The most common industries among freelancers in Dusseldorf, Germany who have used SOAP in their recent projects are Information Technology (92%), Banking and Finance (54%), and Manufacturing (54%).
The most common business areas among freelancers in Dusseldorf, Germany who have used SOAP in their recent projects are Information Technology (100%), Product Development (92%), and Quality Assurance (69%).
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 
Cologne 
Frankfurt 
Stuttgart 
Essen 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
