XQuery Experts in Germany
for structured data projects, matched in minutes with vetted professionalsHire experts who query XML repositories, transform complex document structures and connect XQuery with APIs, databases and publishing workflows. FRATCH matches you quickly and precisely with vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used XQuery
Younes H.
Last position:
Senior Backend Developer at PTA
- Development and maintenance of database-driven applications for managing supplier and food contracts, with extensive use of Oracle PL/SQL for complex business logic and data processing
- Optimization of PL/SQL procedures, functions, and triggers to ensure the performance and scalability of Oracle database solutions
- Ensuring compliance with best practices in PL/SQL development and implementing standards for code quality and data integrity
- Close collaboration with backend and frontend teams to ensure smooth integration between the Oracle database, C#-based APIs, and Azure cloud services
Dimitrij N.
Last position:
Logistics Designer / Network Designer at Deutsche Bahn Cargo
- Requirements analysis, design, and development of a product for freight logistics (dispatching, planning, timetable and network optimization)
- Documentation of technical focus areas and support with acceptance and integration testing
- DBMS-agnostic modeling and mathematical algorithms for optimization with solver integration (Gurobi, Cplex, Coin-OR)
- Implementation of service layer, automated testing, and integration with third-party systems
Peter B.
Last position:
Data Warehouse Consultant (Development and Analysis) at Atruvia AG
- Developed and enhanced ETL loading jobs with IBM DataStage and optimized SQL in an IBM DB2 environment as part of the Agree21 data migration
- Analyzed data quality and developed test procedures
- Created PowerShell scripts and documented GIT deployment processes
- Technologies: RedHat Linux, IBM DB2 with DBVisualizer, IBM InfoSphere DataStage 11.7, JIRA, TortoiseGIT, TortoiseSVN, PowerShell scripts
Stephan Z.
Last position:
GIS expert and database developer for passenger information systems at Deutsche Bahn AG
- Developed automated tools for train passenger information with PostgreSQL/PostGIS (administration & development)
- Used imposm, osm2pgsql, pgsql2shp, GeoServer (WMS, WFS, WCS, etc.)
- Used various geo formats, e.g. OpenStreetMap (OSM)
- Technologies: PostgreSQL/PostGIS, imposm, osm2pgsql, pgsql2hp, ESRI Shapefiles, QGIS, Python 3.x, PyDev, Eclipse, Linux, AWS, OSM, XML, bash, pgsql, Docker
Petru K.
Last position:
Architect & Technical Team Lead & Senior Developer at Goetel GmbH
- Design, architecture & development/programming of ETL/ELT data pipelines, DWH, BI solution
- Technical project lead, POC – proof-of-concept creation
- Liaison between business units and technical teams
- Azure DevOps Boards & Jira
- Data modeling & data engineering – data warehouse & data mart
- Azure (Data Factory, Azure SQL, Azure DevOps CI/CD, Azure Data Lake V2, Business Central REST API, OData API, OAuth2 tokens)
- SharePoint lists & API for ADF, Firebird DB, Postgres DB, DB2
- Power BI (Power Query), DAX, Excel PBI add-on, GIS data
- Automated ETL process monitoring/logging, performance monitoring, error monitoring – capturing & resolution
- Index performance tuning & statistics monitoring, Transact-SQL
- Data security – MFA (multi-factor authentication) & OAuth2, MS Graph, Azure networks & firewalls, gateways, roles, user groups – with read/write permissions
- Sources – Vario Bill, Camunda, Radius, Geo Database, OTRS, PAST, MS Dynamics Business Central, Azure Blob Data Lake, SharePoint lists
Robert M.
Last position:
Air traffic tax German Customs Administration SOAP Webservices Client Requests at Team GmbH
In the citizens' and business customer portal of the Customs Administration, airlines submit applications for departures and landings every month
These applications are forwarded to the caseworkers via SOAP web service and, after review and processing, any queries or notifications are returned via SOAP web service
PL/SQL programming of SOAP webservices client requests for HTTP/XML message exchange between the BuG portal and the caseworkers
New creation and change requests for Forms and Reports 12 modules
Forms applications start and read SOAP webservice requests via PL/SQL packages, process them and send Reports 12 documents to the airlines
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
Claus K.
Last position:
Developer, Architect at Freelance Developer
Discover over 15,000 top freelancers
Statistics of experts using XQuery
Aggregated from the professional profiles of matched freelancers.
Experience
26 years
Position duration
2.5 years
Positions per freelancer
19
Top business areas
Information Technology, Product Development, Business Intelligence
Top industries
Information Technology, Banking and Finance, Education
Certification focus areas
Information Technology, Project Management, Business Intelligence
Bachelor's degree or higher
71%
Master's degree or higher
43%
Certifications per freelancer
4
Most common languages
German, English, French
Speak two or more languages
88%
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 XQuery
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.
XQuery 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 (100%)
- Banking and Finance (75%)
- Education (63%)
- Transportation (63%)
- Healthcare (50%)
- Professional Services (50%)
- Government and Administration (50%)
- Chemical (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What XQuery does
XQuery is a query and transformation language for XML data. It retrieves information from hierarchical documents, combines results across collections and produces XML, HTML, text or application-ready structures. The language is defined by the W3C and is often used where relational queries or JSON-focused tools do not fit the data model.
Where it is used
XQuery supports content-heavy systems that must search, enrich and republish structured information. Typical applications include:
- Product catalog and parts-data transformation
- Digital publishing and document assembly
- Metadata, archive and records search
- XML feeds, exports and integration pipelines
- Regulatory and technical documentation workflows
Ecosystem and tooling
Professionals work with XML Schema, XPath, XSLT and XQuery Update Facility, often alongside RESTXQ or SOAP interfaces. Common runtimes and databases include BaseX, eXist-db, MarkLogic and Saxon. Strong practice also covers namespaces, typed data, serialization, query optimization and automated tests.
When companies need specialists
Freelance expertise helps when an XML repository has become difficult to query, a migration must preserve document structure or publishing output needs to be made consistent. Companies in Germany may bring in remote specialists for focused delivery, while on-site collaboration can help with complex content models, stakeholder workshops and knowledge transfer. German or English communication should match the project team.
Project deliverables
A specialist may review an existing query library, design reusable modules or build transformations for several output channels. Deliverables can include data models, optimized queries, RESTXQ services, migration scripts, validation rules and deployment documentation. Integration with Java, SQL, JSON, message queues or content management systems is often part of the work.
What strong professionals bring
Good XQuery work is more than writing expressions that return the right nodes. Strong professionals understand document semantics, namespace behavior, static and dynamic typing, memory use and the limits of each runtime. They explain trade-offs clearly, protect source data, test edge cases and leave maintainable queries that future teams can extend.
Frequently asked questions
Everything clients usually want to know about XQuery, in one place.
XQuery is used to search, combine and transform XML documents and collections. Companies use it for publishing, product data, archives, metadata, integrations and other systems where nested document structures are central.
XQuery is broader than XPath because it can construct and transform complete result documents, not only select nodes. Compared with SQL, it is designed for hierarchical XML rather than relational tables, while XSLT is often preferred for template-driven document transformations.
An experienced XQuery specialist often also works with XML Schema, XPath, XSLT, namespaces and serialization. Useful adjacent skills include REST APIs, Java, JSON conversion, SQL, content management systems and XML database administration.
Clarify the XML formats, query engine, data volume, output targets and integration points before engaging an XQuery freelancer. A short technical review can reveal whether the project needs query optimization, a transformation layer, data migration or a wider content-model redesign.
The right level depends on the repository, query complexity and production risk. A strong XQuery professional should show relevant work with the chosen runtime, namespaces, performance testing and deployment practices rather than relying on language knowledge alone.
Yes. XQuery work is often suitable for remote collaboration because queries, schemas, tests and transformations can be reviewed through shared repositories. On-site sessions in Germany may still help when teams need workshops around complex document models or publishing processes.
Review whether XQuery handles namespaces, missing values, mixed content, large collections and invalid input safely. Ask for readable modules, automated tests, clear performance reasoning and outputs that remain valid under real production data.
XQuery remains useful when existing XML repositories, schemas or publishing workflows carry important business data. A specialist can connect XML and JSON systems, use maps and arrays where appropriate, and help decide which transformations belong in the query layer or elsewhere.
The average hourly rate of freelancers in Germany who have used XQuery in their recent projects is 103 €, which corresponds to a daily rate of about 827 € based on an 8-hour working day.
Of the freelancers in Germany who have used XQuery in their recent projects, 71% hold at least a Bachelor's degree and 43% hold at least a Master's degree.
On average, freelancers in Germany who have used XQuery in their recent projects have 26 years of professional experience, with a single engagement typically lasting around 2.5 years.
The most common languages among freelancers in Germany who have used XQuery in their recent projects are German (100%), English (88%), and French (38%).
The most common industries among freelancers in Germany who have used XQuery in their recent projects are Information Technology (100%), Banking and Finance (75%), and Education (63%).
The most common business areas among freelancers in Germany who have used XQuery in their recent projects are Information Technology (100%), Product Development (100%), and Business Intelligence (88%).
Main locations of FRATCH Experts, who have recently used XQuery
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
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
