JAX-WS Experts in Germany
for reliable SOAP services, matched in minutes with vetted freelance professionalsHire experts who design SOAP web services, work with WSDL and JAXB, and modernize Java integrations with Apache CXF or Metro. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your technical needs.
Meet FRATCH Experts in Germany, who have recently used JAX-WS
Timo H.
Last position:
Software Developer at Smiths Detection
- Extension of a Swing-based UI for recording Security Restricted Articles during baggage screening.
- Introduction of a new workflow for recording Deboarding Events.
- Extension of the reporting system for Security Restricted Articles and Deboarding Events.
- Implementation using JBoss Wildfly, PostgreSQL, spring-boot 3.x, Java 8/21, Swing, JSF, JAX-RS/Resteasy, Docker, Maven, Kiro.
Tamás E.
Last position:
Senior Software Developer / Tech Lead at NDA (defense / OSINT)
- Designing the audit logging framework
- Implementing APIs for developers to integrate in their codebase
- Implementing ingestion pipeline, database query layer and UI for browsing the audit events
- Improving stability and reliability of the backend system
Waldemar B.
Last position:
Software-Architekt Produktdaten-Management Tool at Ferchau Contract GmbH
- Definition of the software architecture
- Design and development of modules
- Supporting internal employees in the learning and onboarding process
- Tools: SAP CAP / CDS, Java 21, SAP Hana, SAP Business Technology Platform (BTP)
Rainer L.
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
Assessment of the current state
Evaluation of Redgate Flyway functionalities
Concept development
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Knowledge: Docker, Continuous Delivery, Continuous Integration, Redgate Flyway, Major Releases, Minor Releases
Jorge E.
Last position:
Bittrich & Bittrich
- Extension and maintenance of the Doktree tax advisory document management tool
- Alfresco and Angular development
- Linux system maintenance
Hooman B.
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.
Thorsten M.
Last position:
Odoo Implementer at N.N.
As project manager for the Odoo implementation at a small company, I was responsible for designing, implementing, and training a fully integrated CRM and accounting system. Through structured requirements analysis, precise data migration, and targeted change management, I was able to complete the rollout in just eight weeks. The project led to a significant reduction in manual tasks, faster business processes, and increased real-time transparency.
Main Responsibilities
Requirements analysis and process mapping Configuration of Odoo modules: CRM, Sales, and Accounting Data migration (Excel/CSV → Odoo) and quality control Creation of workflows, automated email rules, and dashboards Conducting training sessions and providing support after go-live Project coordination (budget, schedule, stakeholder communication)
Key Achievements
Full implementation of the Odoo suite within the set timeframe (8 weeks) 30% reduction in accounting time and 25% acceleration of the lead-to-sale flow 100% customer satisfaction after go-live, based on survey results Successful migration of 100% of existing master data without data loss Establishment of a sustainable support infrastructure (3-month post go-live support)
Impact
Improved decision-making through real-time dashboards and automated reports Increased efficiency and cost savings (≈ €8,000/month) Scalability for future growth (additional modules can be integrated seamlessly) Strengthened sales and finance departments through seamless process integration
This summary highlights how I created concrete and measurable value for the company through structured project work, technical expertise, and targeted training.
Ralf K.
Last position:
Senior Java Developer, Consultant at Dataport AÖR
- Maintenance and further development of the Java/Swing-based @rtus FormsEditor
- Design and development of a graphical formula editor based on Google Blockly for representing a project-specific DSL, including parsing and code generation
- Implementation of character-accurate synchronization between the editor and print preview to improve the user experience
- Technologies: Java 17/21, Swing, JavaFX, JBoss/Wildfly, JUnit, Mockito, Blockly, JPedal, ICEPDF, Eclipse
Daniel S.
Last position:
Senior Software Engineer at energielenker solutions GmbH
- Designed and implemented a Python-based ETL pipeline with the Dagster framework to transform raw energy data from heterogeneous sources using InfluxDB and visualizations in Grafana
- Defined time-based and dependency-based jobs
- Deployed to managed Kubernetes clusters using Helm
- Integrated InfluxDB Cloud
- Prepared data for use in Grafana, including cleaning, normalization, and time-based resampling in Python
- Developed dashboards and visualizations in Grafana
- Developed unit tests with mocking using pytest
- Set up a CI/CD pipeline in GitLab
Technologies: Python, Dagster, InfluxDB, Grafana, pandas, pytest, REST, CI/CD, GitLab, Container, Kubernetes, Helm, Docker, Cloud
Niels M.
Last position:
Senior Software Developer / Cloud Architect at Biesterfeld SE
- Architected ETL services for event-driven data exchange between enterprise systems on a Kafka streaming backbone.
- Optimized CI/CD pipelines for Azure AKS deployments and improved OpenSearch monitoring and alerting for proactive incident detection.
Tech: Java / Kotlin, Quarkus, Kafka / Avro, Azure / AKS, Azure Storage Container, ArgoCD, GitLab CI, OpenSearch, Terraform
Timo K.
Last position:
Senior Fullstack Developer
- Lead Developer / Tech Lead in a large banking group for a complete redevelopment of payment systems
- Rebuilding payment processing in stream processing
- Development and design of cross-border payment stream processing based on Kafka and Kafka Streams
- Development of different input formats for the business team using Drools rules to dynamically adjust validation rules
- Evaluation and comparison of different public cloud providers regarding the databases they offer
- Technologies & Tools: Java 21, Kotlin, Spring Boot, Kafka, Kubernetes, Azure, TDD, JEE, REST, Angular, Spark, Google Cloud, SCDF, PostgreSQL, Drools, Git, S3, MongoDB
Marie-Josée M.
Last position:
Java Engineer / Developer at Davaso GmbH
- Involved in the full development lifecycle, including design, coding, testing, and deployment of Java-based applications.
- Built and maintained high-performance RESTful APIs and microservices, ensuring scalability and reliable data exchange.
- Practiced code reviews, used version control systems (e.g., Git), and collaborated closely with cross-functional teams to deliver robust software solutions.
- Implemented, managed, and optimized complex business logic and decision-making processes using the Drools Rules Engine, leveraging DRL (Drools Rule Language) for dynamic configuration.
- Developed software solutions for a major service provider in the healthcare insurance sector, specifically focusing on claims processing and reconciliation logic to ensure cost-effective reimbursement for health funds.
Dimitri S.
Last position:
Fullstack Developer, Integrator at Generali Deutschland Versicherung AG
- Developing automated build and deployment processes for the exclusive front office systems
- Integrating the front office systems into the IT infrastructure
- Developing innovative, user-friendly sales software for financial advisors
- Ensuring quality and flexibility through automation and working with CI/CD
- Working according to DevOps principles
- Operating the software together as a team in the AWS cloud and Azure cloud
- Deploying software artifacts to testing and production environments
- Maintaining the test environments
- Performing error analysis and providing information for further root cause analysis
- Maintaining and supporting the build pipeline
- Supporting load testing
- Coordinating the batch execution schedule with batch automation
- Creating concepts to further develop the software packaging process
- Building and delivering components to partners
- Developing GitLab and Jenkins pipelines for building, deploying and integrating components
- Automating processes with Spring Boot applications with a GUI (Thymeleaf, Angular 19)
- Developing RESTful Spring Boot applications with Kotlin and Angular 19, JDBC and REST accesses, data exchange via SFTP, XML (JAXB)
- Designing components using Domain-Driven Design (DDD)
- Replacing cmd and bash scripts with Spring Boot applications with a GUI
- Replacing Java 8 applications with JSP by Spring Boot 3 applications (Thymeleaf, Angular)
- Implementing frontend and backend authentication via Keycloak
- Writing JUnit tests with Mockito
- Increasing code coverage for SonarQube analysis
Andreas N.
Last position:
Open Source Founder at Privatier
- AI-supported source code analysis
- AI image generation for a shirt shop
- AI-supported analysis of connected YouTube channels and commenting users
- AI-supported software prototyping
- Operation of a local AI environment
- 3D printing and scanning: development of a process to repair GfK parts using 3D-printed negative molds
The focus is on practical applications of new technologies, founding an open-source project for a yacht autopilot, as well as yacht refit and motorhome conversion.
Vladimir M.
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 JAX-WS
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
2.4 years
Positions per freelancer
13
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Banking and Finance, Insurance
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100%
Master's degree or higher
71%
Doctorate
14%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
92%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Germany using JAX-WS
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 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
JAX-WS 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 (69%)
- Insurance (54%)
- Manufacturing (38%)
- Retail (38%)
- Telecommunication (38%)
- Automotive (35%)
- Professional Services (35%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
SOAP foundations
JAX-WS, short for Java API for XML Web Services, is the Java standard for building and consuming SOAP-based web services. It supports contract-first and code-first development, exposing operations through WSDL and exchanging structured XML messages. Companies use it where formal contracts, interoperability and dependable enterprise integration matter.
Services and contracts
JAX-WS specialists create service endpoints, client proxies and WSDL contracts for systems that must communicate across vendors or technology stacks. They handle SOAP headers, bindings, XML namespaces, fault messages and WS-Addressing where required. Strong contract design keeps integrations stable as services evolve.
- Expose Java business functions as SOAP operations
- Generate clients from WSDL contracts
- Define JAXB mappings for XML request and response models
- Configure authentication, encryption and message policies
Ecosystem and tooling
The work commonly involves JAXB, SAAJ, WSDL tooling and Java application servers. Depending on the system, experts use the JAX-WS Reference Implementation, Metro or Apache CXF, alongside Maven or Gradle and application servers such as WildFly, WebLogic or WebSphere. Jakarta XML Web Services also matters when migrating beyond the older Java EE namespace.
When expertise matters
Companies often bring in freelance JAX-WS professionals when a legacy SOAP estate needs support, a partner integration must meet a strict contract, or a Java service is moving between runtimes. Germany-based teams may benefit from specialists who can work on-site for integration workshops or remotely across distributed delivery teams. Clear English and, where needed, German communication help when coordinating with business and infrastructure stakeholders.
- Diagnose incompatible WSDL, schema or namespace changes
- Replace fragile generated clients or endpoints
- Connect SOAP services to ERP, banking or public-sector systems
- Plan migration from Java EE APIs to Jakarta XML Web Services
Adjacent engineering skills
Effective specialists understand HTTP, XML Schema, SOAP versions, TLS and enterprise authentication. They can trace requests, inspect generated classes, test faults and manage certificates without weakening the service contract. Experience with REST, Spring, containers, CI pipelines and observability helps when JAX-WS services sit inside a wider integration landscape.
Quality signals
A strong professional explains the service contract before changing implementation code and tests both valid and fault responses. They document generated sources, binding customizations, security settings and runtime assumptions. Look for careful compatibility checks, repeatable builds and evidence that the specialist has supported production integrations rather than only generated a sample endpoint.
Frequently asked questions
What clients ask us most about JAX-WS — answered in short.
JAX-WS is used to create and consume SOAP web services in Java applications. It is common for formal business integrations that rely on WSDL contracts, XML schemas, typed clients and reliable fault handling.
JAX-WS is built around SOAP messages and formal service contracts, while JAX-RS is designed for REST APIs using HTTP resources and commonly JSON. The right choice depends on partner requirements, existing enterprise systems, security policies and the level of contract control needed.
JAX-WS work often includes JAXB, WSDL, SAAJ, Maven or Gradle and an implementation such as Metro or Apache CXF. Experience with Java application servers, TLS, WS-Security, XML Schema and Jakarta XML Web Services is valuable for real production systems.
JAX-WS expertise is useful when a SOAP integration fails, a WSDL contract changes, generated clients become unreliable or a service must move to a new runtime. A specialist can also support migrations from Java EE namespaces to Jakarta XML Web Services and document risks before implementation changes.
JAX-WS projects vary from a focused client integration to a complex service estate with security and application-server dependencies. Match the specialist to the risk: contract design and production troubleshooting call for deeper integration experience than a small, well-defined client connection.
JAX-WS work is often suitable for remote collaboration because contracts, schemas, logs and test suites can be reviewed online. On-site workshops in Germany can still help when teams need to map legacy interfaces, coordinate partner systems or resolve security and deployment constraints.
JAX-WS quality shows in clear contract decisions, repeatable builds, useful fault responses and tests for namespaces, schemas and security policies. Ask how the specialist handles backward compatibility, generated code, certificate changes and production diagnostics.
JAX-WS specialists should confirm the WSDL source, SOAP version, runtime, implementation, authentication model and deployment environment. They should also ask about partner constraints, schema ownership, compatibility expectations and whether the project is using javax or jakarta namespaces.
The average hourly rate of freelancers in Germany who have used JAX-WS in their recent projects is 97 €, which corresponds to a daily rate of about 777 € based on an 8-hour working day.
Of the freelancers in Germany who have used JAX-WS in their recent projects, 100% hold at least a Bachelor's degree, 71% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Germany who have used JAX-WS in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 2.4 years.
The most common languages among freelancers in Germany who have used JAX-WS in their recent projects are German (100%), English (92%), and French (19%).
The most common industries among freelancers in Germany who have used JAX-WS in their recent projects are Information Technology (92%), Banking and Finance (69%), and Insurance (54%).
The most common business areas among freelancers in Germany who have used JAX-WS in their recent projects are Information Technology (100%), Product Development (96%), and Quality Assurance (65%).
Main locations of FRATCH Experts, who have recently used JAX-WS
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
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Philipp Thomaschewski
FRATCH CEO
