XML Experts in Dortmund
for reliable data exchange, matched in minutes with vetted freelancersHire experts who design XML schemas, transform documents with XSLT and connect enterprise systems through SOAP or REST integrations. FRATCH matches you quickly and precisely with vetted, available freelancers who fit your project.
Meet FRATCH Experts in Dortmund, who have recently used XML
Arkadius S.
Last position:
AWS Pricing Platform / API & Integration Architecture at Porsche Digital
Development and evolutionary further development of a highly available, cloud-native microservice and integration architecture for dealer and retail processes in the Porsche Car Configurator.
Responsibilities
- Development of Java-/Kotlin-based backend, API, and integration components (Spring Boot)
- Integration of internal and external systems via REST/OpenAPI, GraphQL, Apache Kafka, and AWS SQS (synchronous and asynchronous)
- Implementation of stable, high-performance communication and data flows in a cloud-native platform architecture
- Processing of structured data formats (JSON, Protobuf, GraphQL schemas) based on existing API patterns
- Performance optimization of distributed microservices with reduced response times and higher operational stability
- Technical tests (unit, integration, and API tests) as well as error analysis in production-like environments
- AWS Infrastructure as Code with Terraform and AWS CDK
- CI/CD automation (build, test, and deployment pipelines) with GitHub Actions
- AI-supported feature implementation (GitHub Copilot Agent)
Label: Kotlin, Java 25, Spring Boot 4, Protobuf, TypeScript, AWS, Terraform, CDK, Apache Kafka, AWS SQS, REST/OpenAPI, GraphQL, JSON, PostgreSQL, Docker, GitHub Actions, Maven, Gradle, JUnit, Mockito, Testcontainers
Diego E.
Last position:
RPG Software Developer from RPG III to Free Format
- Development of software and system support for RPG development.
- Development, optimization and maintenance of programs in RPG (RPG II to ILE Free Format).
- Performing integration tasks, data management as well as applying and managing system updates.
- User support and training to ensure smooth system operation.
Jens S.
Last position:
Network Technology at ISP, Internet Service Provider, BGP Peering
- Optimization of the transmission media of the data links in the Ruhr area
- Configuration/expansion of switches and routers for an autonomous system AS
- Improve the network protocols used Layer 2/3 (OSI model), RSTP, broadcast, etc.
- Laying cables, crimping, antennas, routers, switches
- Maintenance, expansion, selection and prioritization of troubleshooting measures for network monitoring (PRTG, The Dude)
- Organization and new connection of another BGP peering, data center, NGN fiber optic
- VPN IPSec site connections for 6 sites with PFSense, Fritzbox
- Configuration of WLAN devices (Mikrotik, UBNT
Label: TCP/IP, VLAN, BGP, OSPF, MPLS, VPLS, routing protocols, WLAN, EoIP, PPPoE, routing, SNMP, DHCP, DNS, NAT, native IP, VLAN, Ethernet, VoIP., switches and routers from: Nortel, Cisco, MikroTik, UBNT., network management systems: The Dude, PRTG, UISP
Thomas G.
Last position:
Senior .NET / Cloud Engineer at Freelance
Building an observability and alerting solution for Business Central Job Queue monitoring
- Built a central monitoring solution to track the Business Central Job Queue in a multi-organization environment in Azure DevOps
- Integrated Azure Application Insights and Log Analytics for structured collection and analysis of job runtimes and error events
- Developed KQL queries for targeted analysis of failed jobs and detection of error patterns
- Connected Grafana and Power BI to visualize operational metrics and job status in real time
- Implemented an automated alerting workflow with Power Automate – when a job fails, a notification email is sent immediately
- Ensured transparency about the state of productive background processes during live operations
Result: Full transparency over failed Business Central jobs · Clear reduction in response time through automated email alerting · Stable foundation for proactive operation of productive background processes
Technologies: Azure DevOps | Application Insights | Log Analytics | KQL | Grafana | Power Automate | Power BI | Business Central | Azure Monitor
Mustafa K.
Last position:
Consultant (MBR Designer) at Bayer AG
Introduction of an MES system in pharmaceutical production.
Support in replacing existing recipes by introducing an MES system.
Focus on converting cleaning and manufacturing AKBs into MBRs.
System environment: Werum PAS-X MES, GMP, SAP, Microsoft Office (Word, Excel), XML
Yoav N.
Last position:
Freelance Software Architect at Freelance Consultant
- Various small consultations, e.g. concepts and arcitectures.
- Updating my Matlab, Linux, IPv6, Cyber-Security, C++ (up to 23) and Python skills.
Mohammed A.
Last position:
Data Scientist & Energy Consultant at Accenture GmbH
Manfred L.
Last position:
Senior Consultant Information Security at Creditplus Bank AG
- Designing the information security process based on ITIL 4
- Designing the ITIL 4 incident and change management processes
- Creating information security policies for the bank
- Support in the project for internal audit findings
- Advising on the setup of the bank's internal control systems (ICS)
- Advising on setting up ICS processes
- Advising and supporting security architecture and risk analysis of the existing IT landscape, including IT security architecture, data management, data compliance & physical security
- Advising and project leadership for the security concept of the bank's assets
- Advising and support in contracts with external service providers to meet the bank's regulatory (BAIT; MaRisk; DORA; NIS2; GDPR) and information security requirements
- Support in planning and implementing a SOC/SIEM and risk management
- Support for the spam email team in analyzing and handling incidents
Ilja L.
Last position:
Software Engineer/Architect (Tech Lead) at Mercedes-Benz Tech Innovation GmbH
- Implementation of various interfaces for subsystems and connection to external devices (cameras, scanners, digital lockers)
- Development of various interfaces in the used cars area
- Realization of various prototypes
- Support in UI/UX and data analytics
- Development of frontend and backend solutions
- Kubernetes migration
- Building CI/CD pipelines
- Communication with the business unit and technical design of new solutions
- Cross-team alignment and coordination within the team
- Overview of the entire technology stack and related systems
- Documentation, preparation, and conducting of reviews
- Supporting the team and coordinating releases and key milestones
Henning P.
Last position:
Siemens
- Developed a reporting API with RESTful services and Spring Boot
- LDAP integration
- Migrated services to AWS
- Bootstrap
- Frontend development with Angular 14
- JBoss
- DynamoDB
- S3
- Athena
Christian F.
Last position:
Deutsche Post DHL Group
- Leadership development training
- ITIL
- Prince2
Discover over 15,000 top freelancers
Statistics of experts using XML
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
1.9 years (Germany: 5.2 years)
Positions per freelancer
18 (Germany: 16)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Education
Certification focus areas
Information Technology, Project Management, Product Development
Bachelor's degree or higher
89% (Germany: 88%)
Master's degree or higher
44% (Germany: 53%)
Doctorate
11% (Germany: 9%)
Certifications per freelancer
3
Most common languages
German, English, Spanish
Speak two or more languages
100% (Germany: 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 Dortmund 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 Dortmund using XML
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.
XML 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 (82%)
- Banking and Finance (55%)
- Education (45%)
- Healthcare (45%)
- Manufacturing (45%)
- Telecommunication (45%)
- Automotive (36%)
- Insurance (36%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
XML foundations
XML, or Extensible Markup Language, structures data in a readable format that both people and software can process. Companies use it to exchange business documents, describe configuration, publish content and connect systems that rely on formal data contracts. Its tags, attributes and namespaces make complex information explicit and portable.
Schemas and validation
Reliable XML work starts with a clear model and strict validation rules. Experts create and maintain XML Schema Definition files, document type definitions and namespace strategies that prevent incompatible data from entering a system. They also handle optional fields, reusable types, version changes and validation errors without weakening the contract.
- Design XSD schemas for business data
- Validate documents and explain failures
- Manage namespaces and schema versions
- Define contracts for external partners
Transformations and tools
XSLT converts XML into HTML, text, PDF-ready structures or another XML vocabulary. XPath selects and navigates data, while parsers and serializers process documents inside applications and integration services. Common tooling includes Saxon, Java XML APIs, .NET libraries, command-line validators and IDE support for schema-aware editing.
Integration work
XML remains important in SOAP services, enterprise service buses, document exchange and standards such as RSS, SVG, XHTML and industry-specific formats. Professionals connect XML interfaces with REST APIs, databases, message queues and ERP systems. They map fields, preserve encoding, secure transport and monitor failed messages across system boundaries.
When specialists help
Companies often bring in freelance XML expertise during migrations, partner integrations, compliance-driven format changes or legacy modernization. Dortmund businesses working across manufacturing, logistics, insurance and public services may need dependable data exchange between established systems and newer applications. Remote delivery works well when interface ownership, test data and review routines are clearly defined.
- Replace brittle hand-written transformations
- Integrate a partner or public-sector interface
- Resolve validation and encoding defects
- Document an inherited XML integration
Strong XML professionals
A strong specialist understands XML syntax as well as the business meaning behind each element. They test valid, invalid and boundary documents, trace transformations end to end and explain trade-offs between strict schemas and practical compatibility. Useful adjacent skills include XSLT, XPath, SOAP, API design, Java or .NET, automated testing, security and observability.
Frequently asked questions
Key details about XML, drawn from the questions we get asked most.
XML is used to represent and exchange structured data between applications, partners and departments. It supports invoices, product information, configuration files, document publishing, SOAP services and industry-specific messages. A freelancer can also help convert XML into formats used by modern APIs or internal systems.
XML offers namespaces, attributes, mixed content and mature schema and transformation standards, which suit formal documents and long-lived enterprise interfaces. JSON is usually more compact and convenient for web APIs. The right choice depends on existing contracts, tooling, validation needs and the systems that must exchange the data.
A capable XML specialist often works with XSD, XPath, XSLT, SOAP and XML namespaces. Experience with Java, .NET, REST APIs, message brokers, databases and automated testing is also useful. For sensitive integrations, knowledge of authentication, encryption and secure parser configuration matters.
The required depth depends on the work. A simple transformation may need focused XSLT and XPath knowledge, while a partner integration calls for schema design, mapping, error handling and deployment experience. Ask for examples involving comparable document complexity, validation rules and connected systems rather than relying only on years in the field.
Yes, most XML tasks can be handled remotely when the specialist receives clear interface documentation, representative test files and access to suitable environments. On-site collaboration can help when data flows cross several local teams or involve restricted systems. German-language communication may be useful for workshops, while technical delivery can often be coordinated in English.
Bring in an XML freelancer when an integration is blocked by schema conflicts, difficult transformations, legacy interfaces or unreliable document validation. External expertise is also useful before a migration, when a partner format changes or when internal teams need a clear contract and test strategy. Define the target systems and sample messages before the engagement starts.
Good XML work is validated against an agreed schema and tested with realistic, invalid and edge-case documents. Review namespace handling, encoding, error messages, transformation results and behavior when optional data is missing. Clear documentation and repeatable tests are strong signs that the solution can be maintained by another specialist.
XML remains relevant wherever formal documents, established enterprise standards or strict contracts matter. It continues to appear in SOAP services, publishing workflows, configuration, industry exchanges and integrations with older business software. Specialists can reduce its complexity by isolating transformations and exposing clean interfaces to newer applications.
The average hourly rate of freelancers in Dortmund, Germany who have used XML in their recent projects is 93 €, which corresponds to a daily rate of about 742 € based on an 8-hour working day.
Of the freelancers in Dortmund, Germany who have used XML in their recent projects, 89% hold at least a Bachelor's degree, 44% hold at least a Master's degree, and 11% hold a doctorate.
On average, freelancers in Dortmund, Germany who have used XML in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Dortmund, Germany who have used XML in their recent projects are German (100%), English (100%), and Spanish (18%).
The most common industries among freelancers in Dortmund, Germany who have used XML in their recent projects are Information Technology (82%), Banking and Finance (55%), and Education (45%).
The most common business areas among freelancers in Dortmund, Germany who have used XML in their recent projects are Information Technology (91%), Product Development (73%), and Project Management (64%).
Main locations of FRATCH Experts, who have recently used XML
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 
Essen 
Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
