XML Experts in Dortmund
for reliable data exchange, matched in minutesHire experts who design XML schemas, transform documents with XSLT and connect enterprise systems through SOAP or REST integrations. FRATCH matches you quickly with vetted, available freelancers who fit your technical needs.
Meet FRATCH Experts in Dortmund, who have recently used XML
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 monitor the Business Central Job Queue in a multi-organization environment in Azure DevOps
- Integrated Azure Application Insights and Log Analytics for the 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 statuses in real time
- Implemented an automated alerting workflow with Power Automate – an email notification is triggered immediately when a job fails
- Ensured transparency into the status of productive background processes during ongoing operations
Result: Full transparency into failed Business Central jobs · Significant reduction in response time through automated email alerting · Stable foundation for the proactive operation of productive background processes
Technologies: Azure DevOps | Application Insights | Log Analytics | KQL | Grafana | Power Automate | Power BI | Business Central | Azure Monitor
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
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
Discover over 15,000 top freelancers
Statistics of experts using XML
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
2 years (Germany: 5.2 years)
Positions per freelancer
19 (Germany: 16)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Banking and Finance, Healthcare
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
88%
Master's degree or higher
38% (Germany: 55%)
Doctorate
13% (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 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Dortmund 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 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 29 Oct 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 (80%)
- Banking and Finance (60%)
- Healthcare (50%)
- Manufacturing (50%)
- Telecommunication (50%)
- Automotive (40%)
- Education (40%)
- Insurance (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
XML foundations
XML, or Extensible Markup Language, stores and transports structured information in a text-based format. It separates data from presentation and lets teams define clear elements, attributes and relationships. Companies use XML for documents, configuration files, system interfaces and long-lived data exchange.
Where XML runs
XML remains central in enterprise integration, publishing, finance, logistics, healthcare and industrial systems. It supports standards such as SOAP, RSS, SVG, MathML and industry-specific schemas. In Dortmund, organizations with complex ERP, manufacturing or supply-chain landscapes may rely on XML to connect established systems with newer services.
- Exchange structured business documents
- Connect ERP, CRM and partner systems
- Validate messages against formal schemas
- Transform XML into web, report or database formats
Tools and ecosystem
Strong XML work can include XSD for validation, XPath for selecting data and XSLT for transformation. Professionals may also use DOM, SAX or StAX parsers, XML namespaces, Schematron and SOAP toolkits. Familiarity with Java, .NET, Python, SQL and REST helps when XML sits inside a wider integration landscape.
When specialists help
Companies bring in freelance XML specialists when interfaces are unreliable, schemas are changing or documentation no longer matches production data. They can map partner formats, modernize legacy integrations and build repeatable validation and testing processes. Remote collaboration works well for clearly documented interfaces; on-site workshops can help when several Dortmund teams must align.
- Review complex schemas and message flows
- Trace failed transformations or validation errors
- Migrate XML interfaces without breaking partners
- Document contracts for internal and external teams
Quality signals
A capable professional understands namespaces, encoding, schema evolution and security risks such as external entity attacks. They test valid, invalid and unexpected documents instead of checking only happy paths. Clear mappings, useful error messages, version control and readable documentation indicate work that other teams can maintain.
XML in modern systems
XML is often compared with JSON, YAML or database formats, but the right choice depends on the contract and ecosystem. XML offers mature validation, namespaces, mixed content and strong support for document-oriented standards. Experienced specialists know when to retain it, when to transform it and when a different format is more suitable.
Frequently asked questions
Key details about XML, drawn from the questions we get asked most.
XML is used to represent, validate and exchange structured data between applications and organizations. It is common in enterprise integrations, technical documents, configuration files, publishing workflows and standards-based messages.
XML provides schemas, namespaces, attributes and mature document features that suit complex contracts and regulated exchanges. JSON is usually more compact and convenient for web APIs, so the decision depends on existing systems, validation needs and the data model.
A strong XML specialist often works with XSD, XPath, XSLT, namespaces and parsing libraries. SOAP, REST, Java, .NET, SQL, message queues and automated testing are valuable adjacent skills when XML supports system integration.
The required experience depends on the scope and risk. A simple transformation may need focused XSLT knowledge, while a partner integration involving schemas, security, versioning and legacy systems calls for a professional who has handled similar message flows.
XML projects are often suitable for remote collaboration because schemas, mappings, test messages and interface logs can be shared digitally. On-site sessions in Dortmund can still be useful for workshops involving domain teams, external partners or sensitive integration environments.
Keep XML when partners depend on established schemas, when documents contain mixed content or when formal validation and namespaces are important. A migration makes more sense when the surrounding systems are already designed around lightweight JSON APIs and the existing contract offers little value.
Review how the professional handles namespaces, schema versions, malformed input, encoding and security. Good work includes automated validation, representative test cases, clear mappings, traceable error handling and documentation that another specialist can use.
A XML assignment should begin with questions about message ownership, schemas, partner constraints, transformation rules, transport protocols and deployment environments. Freelancers should also confirm sample documents, failure expectations, versioning rules and who approves interface changes.
The average hourly rate of freelancers in Dortmund, Germany who have used XML in their recent projects is 91 €, which corresponds to a daily rate of about 729 € based on an 8-hour working day.
Of the freelancers in Dortmund, Germany who have used XML in their recent projects, 88% hold at least a Bachelor's degree, 38% hold at least a Master's degree, and 13% 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 2 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 (20%).
The most common industries among freelancers in Dortmund, Germany who have used XML in their recent projects are Information Technology (80%), Banking and Finance (60%), and Healthcare (50%).
The most common business areas among freelancers in Dortmund, Germany who have used XML in their recent projects are Information Technology (90%), Product Development (70%), and Operations (60%).
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.
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Hamburg 
Munich 
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Frankfurt 
Stuttgart 
Dusseldorf 
Leipzig 
Essen 
Bremen 
Hanover 
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Philipp Thomaschewski
FRATCH CEO
