JAXB Experts in Germany
to modernize XML integrations with vetted freelancers matched by AIHire experts who generate Java bindings from XML schemas, maintain SOAP integrations and handle Jakarta XML Binding migrations. FRATCH connects you with precise matches from vetted, available freelancers in minutes.
Meet FRATCH Experts in Germany, who have recently used JAXB
Marcus B.
Last position:
Java and Quarkus Expert at Large German energy service provider
- Modernization of a large-scale Java enterprise application*
The project is modernizing a complex enterprise application that has grown over many years. The existing Spring-based legacy system runs on Java 8, OSGi, and Eclipse RCP and is being gradually migrated to a modern, maintainable architecture with Java 25 and Quarkus.
Marcus works on analysis, architecture, refactoring, and implementation. One focus is on untangling historically grown structures and dependencies and on building a clean, sustainable Java and Quarkus technology stack.
Tools & technologies: Java 8, Java 25, Quarkus, Hibernate ORM with Panache, EclipseLink, OSGi, Eclipse RCP, Maven, JUnit, Mockito, REST, JSON, Git, Eclipse IDE, IntelliJ IDEA Ultimate, Jira, Confluence
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.
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
Stefan A.
Last position:
Sole Architect and Developer at Bauernhof-Eis Stangl GbR
Design and implementation of a compact ERP, CRM, accounting, and production-planning platform for a German food manufacturer. The system replaces Rechnung11, self-built Excel sheets, and manual processes for fewer than 10 internal users.
- Designed and implemented the full platform architecture as sole architect and developer.
- Built modules for customer management, B2B order handling, invoicing, production planning, and accounting support.
- Implemented DATEV export, ZUGFeRD/XRechnung e-invoicing, FinTS bank statement synchronization, and GoBD audit trail concepts.
- Used AI-supported workflows for prototyping, test support, and implementation acceleration while retaining full architecture, review, testing strategy, and technical ownership.
Technology: Java 23, Spring Boot 3, Spring Data JPA, Spring Security, Vue 3, TypeScript, PostgreSQL, Flyway, REST, OpenAPI, JWT, TOTP, RBAC, DATEV, FinTS, ZUGFeRD, XRechnung, GoBD, JUnit, Mockito, Testcontainers, Playwright, Docker, GitLab CI/CD
Ramazan C.
Last position:
Fullstack-/DevOps Engineer at BKA (Federal Criminal Police Office)
Development and further development of an internal platform for managing and providing technical resources, virtual machines, and infrastructure services. The platform supports self-service processes and covers functions that are conceptually comparable to cloud management solutions like Azure or AWS.
- Responsible involvement in the design, development, and implementation of new backend and frontend features
- Hands-on development with Java, Spring Boot, Python, and Angular
- Implementation of REST interfaces, business logic, validations, and integrations into existing system landscapes
- Further development of modern web interfaces with Angular, including connection to backend services
- Participation in architecture and design decisions within the team, especially with regard to scalability, maintainability, and clean interfaces
- Containerization and deployment of applications with Docker, Kubernetes, and Helm
- Support with CI/CD processes and deployment to Kubernetes-based environments
- Work in the environment of vSphere, Broadcom, GitLab CI/CD, ArgoCD, Maven, npm, and NuGet
- Close collaboration with developers, business teams, DevOps, and other technical stakeholders
- Analysis of technical requirements, deriving suitable solutions, and independent implementation in an agile team
- Use of GitHub Copilot to support code generation, refactoring, test case creation, and technical documentation
Methods/ tools/ technologies: Languages & frameworks: Java (21), Spring Boot (4.x), Python, Angular, Robot Framework, Kubernetes, Helm Persistence: PostgreSQL, MongoDB, Hibernate, Liquibase Architecture & communication: REST, gRPC, GraphQL, Apache Kafka, OpenAPI, Microservices, Event Driven, Domain Driven Design Cloud & infrastructure: Terraform, Docker, Rancher, Helm, Ansible Security: OAuth2, MS (Entra ID), web security, Keycloak (extensions for detailed group rights) DevOps: GitLab CI/CD, Ansible, Maven, Gradle, Grafana, Prometheus, Git, GitHub Copilot Testing & QM: JUnit, Robot Framework, automated component and integration tests, E2E tests with Playwright, Testcontainers, EasyMock Methodology & approach: Kanban, JIRA, Confluence, Clean Code
Armin V.
Last position:
Software Developer at DFS GmbH
- TANGe is a DFS project to introduce a modern digital tower system that is meant to make airport air traffic handling safer, more efficient, and future-ready. My current task in this project is the development of the Runway SID Assignment Service, which is responsible for assigning departure routes from an airport. SID - Standard Instrument Departure stands for a standardized departure route.
Software: Java, microservices, Kafka, Robot Framework, Gitlab, Kubernetes, Docker
Olaf T.
Last position:
BI Architect in a Kanban Team at Gulp / Randstad for HHLA
- Creation of automated tests.
- Extension of the functionality of the enterprise BI data warehouse.
- Design and development in SQL and PL/SQL.
- Data modeling as well as performance measurement and tuning.
- Creation of and contribution to user stories and concepts.
- Technical environment: Windows, Linux.
- Database: Oracle 19c incl. DWH, CDB, PDB.
- Tools: Confluence, CVS, Eclipse, Git, GitLab, Jira, N4, PL/SQL, SQL Developer, utPLSQL.
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
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
Christian T.
Last position:
HDI DevOps & Fullstack Engineer at HDI
- Spring Boot Software Engineer
- DevOps Engineer (Kubernetes, Azure DevOps)
Toolstack: Java, Spring Boot, Kubernetes, Helm, GitOps, ArgoCD, Docker, Azure DevOps, CI/CD Pipelines, Git, Postgres
Jorge E.
Last position:
Bittrich & Bittrich
- Extension and maintenance of the Doktree tax advisory document management tool
- Alfresco and Angular development
- Linux system maintenance
Adem S.
Last position:
IT Consultant (Test Manager) & CEO at Trikolon Consulting GmbH
- Development and implementation of test concepts for complex, multi-layered systems
- Creation of regular management reports and presentations for stakeholders and clients
- Technical and disciplinary leadership of international test teams (coordination, coaching, resource planning)
- Responsibility for quality assurance across multiple test levels (unit, integration, system, and acceptance tests)
- Design of test cases and test plans in Azure DevOps; ensuring traceability and coverage
- Use of BDD approaches (Gherkin/Cucumber) to prepare test automation
- Building a test automation architecture with Playwright and integrating new tests into CI/CD pipelines
- Performing API tests (REST) and tests for mobile/PWA applications
- Setup and maintenance of test environments across multiple stages (integration, QA, UAT, pre-production)
- Test data management (synthetic and production-like data), ensuring consistency and reproducibility
- Collaboration with DevOps teams for containerization (Docker/OpenShift) and CI/CD integration
- Working under SAFe & Scrum, closely coordinating with product owners and DevOps teams
- Active participation in PI plannings, sprint reviews, and retrospectives
- Promoting an agile QA culture through coaching and knowledge sharing
- Introducing scalable test automation with Playwright → significant reduction of manual testing efforts
- Increasing test transparency through clean defect and reporting management in Azure DevOps
- Improved release quality through an end-to-end QA strategy and automated regression tests
- Strategic leadership of Trikolon Consulting GmbH and responsibility for finance, personnel, and business development
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
Fabio F.
Last position:
Senior Software Developer Backend/Frontend at Logistikunternehmen Bremerhaven
- Designed and implemented a slot management system for efficient control of truck arrivals and reducing wait times in logistics operations
- Requirements analysis
- Designed and developed a frontend with React
- Backend development with Spring Boot / JPA
- Designed and implemented REST APIs with Spring Boot OpenAPI
- Technologies: Spring Boot, React, Java, JUnit, Mockito, IBM Db2, SQL, Maven, JPA, Docker, Kafka, SOAP, REST, Git, XML, HTML, CSS, JSON, OpenAPI, Stoplight, Jenkins, WebSphere Application Server, Freemarker, IntelliJ
- Methodology: Scrum, Clean Code
- Team size: 5
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
Discover over 15,000 top freelancers
Statistics of experts using JAXB
Aggregated from the professional profiles of matched freelancers.
Experience
24 years
Position duration
2.1 years
Positions per freelancer
15
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
62%
Doctorate
14%
Certifications per freelancer
2
Most common languages
German, English, Spanish
Speak two or more languages
97%
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 Germany 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 Germany using JAXB
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.
JAXB 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 (94%)
- Banking and Finance (83%)
- Insurance (63%)
- Government and Administration (51%)
- Retail (51%)
- Transportation (46%)
- Manufacturing (46%)
- Automotive (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
XML binding fundamentals
JAXB, short for Java Architecture for XML Binding, maps XML documents to Java objects and back again. It uses schemas, annotations and generated classes to make structured XML data easier to process in Java applications. Companies rely on it for reliable serialization, deserialization and validation at system boundaries.
Schemas and generated models
JAXB work often starts with XSD files that define the structure and rules of an XML message. Specialists use tools such as xjc, Maven or Gradle plugins to generate Java classes, then refine bindings with annotations or external customization files. Strong control of namespaces, elements, attributes and optional values prevents subtle integration errors.
- Generate Java models from XSD schemas
- Customize bindings for legacy XML structures
- Configure marshalling, unmarshalling and validation
- Test XML compatibility across service versions
Enterprise integration use cases
JAXB appears in SOAP web services, government data exchange, finance workflows, logistics messages and document-heavy enterprise systems. It supports XML payloads in JAX-WS services, Spring-based integrations and custom messaging pipelines. In Germany, companies often bring in specialists when established XML interfaces must continue working alongside newer Java services.
- Maintain SOAP request and response models
- Connect Java services to partner XML interfaces
- Transform documents between schema versions
- Diagnose namespace and validation failures
Jakarta transition
The move from Java EE JAXB packages to Jakarta XML Binding is a common source of migration work. Experts distinguish javax.xml.bind from jakarta.xml.bind imports and assess the impact on dependencies, application servers, build files and generated sources. They also understand when a project needs compatibility with older runtimes rather than a direct package replacement.
When freelance expertise helps
External support is valuable when an XML contract changes, generated code becomes difficult to maintain or a service migration exposes binding problems. A specialist can review schemas, isolate runtime failures, improve test coverage and document the contract between systems. Remote collaboration works well when repositories, schema examples and test environments are available; on-site work may help during workshops with integration teams.
What strong specialists deliver
Good JAXB professionals understand Java XML APIs as well as the protocols and systems around them. They trace problems from incoming XML through validation, binding and business logic instead of patching generated classes blindly. Look for clear schema reasoning, disciplined dependency management, tests using real payloads and careful handling of backward compatibility.
Frequently asked questions
Need clarity? These are the questions we hear most often about JAXB.
JAXB converts between XML documents and Java objects. Companies use it to process SOAP messages, schema-based documents and partner interfaces without manually reading and writing every XML element.
JAXB is a strong fit when an XSD or formal XML contract drives the integration. Jackson XML can be more flexible for object mapping, while DOM, SAX or StAX offer lower-level control; the right choice depends on schema governance, streaming needs and compatibility requirements.
A strong JAXB specialist should also understand XSD, namespaces, XML Schema validation, SOAP and Java build tools. Experience with JAX-WS, Spring integration, Maven or Gradle and automated contract tests is especially useful.
Complex JAXB work needs deeper experience when schemas are inherited, namespaces are inconsistent or several external systems exchange versioned documents. Migration from javax.xml.bind to jakarta.xml.bind also benefits from someone who can assess runtime, dependency and generated-source compatibility.
JAXB projects are usually suitable for remote collaboration when the specialist can access schemas, sample payloads, build configuration and test environments. On-site workshops can still help when German teams need to align with partners on XML contracts or legacy service behavior.
Ask how the JAXB specialist has handled schema changes, generated code, namespace errors and invalid payloads. Review examples of contract tests, migration decisions and technical documentation rather than relying only on familiarity with the acronym.
JAXB remains relevant where XML contracts, SOAP services or established enterprise exchanges are mandatory. New systems may choose JSON or other formats, but replacing XML is not always practical when partners, regulators or legacy platforms depend on existing schemas.
Poor JAXB implementations often edit generated classes directly, ignore namespace details or treat unmarshalling as automatic validation. Strong specialists separate generated and custom code, configure validation deliberately and test real messages, missing values and incompatible schema changes.
The average hourly rate of freelancers in Germany who have used JAXB in their recent projects is 95 €, which corresponds to a daily rate of about 756 € based on an 8-hour working day.
Of the freelancers in Germany who have used JAXB in their recent projects, 100% hold at least a Bachelor's degree, 62% hold at least a Master's degree, and 14% hold a doctorate.
On average, freelancers in Germany who have used JAXB in their recent projects have 24 years of professional experience, with a single engagement typically lasting around 2.1 years.
The most common languages among freelancers in Germany who have used JAXB in their recent projects are German (100%), English (94%), and Spanish (9%).
The most common industries among freelancers in Germany who have used JAXB in their recent projects are Information Technology (94%), Banking and Finance (83%), and Insurance (63%).
The most common business areas among freelancers in Germany who have used JAXB in their recent projects are Information Technology (100%), Product Development (100%), and Quality Assurance (80%).
Main locations of FRATCH Experts, who have recently used JAXB
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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FRATCH CEO
