XML Expert in Stuttgart
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Meet FRATCH Experts in Stuttgart, who have recently used XML
Matthias S.
Last position:
Software Developer and Consultant at CLADE GmbH
- Analysis of the existing CAN communication between microcontrollers
- Analysis of the sensors used and the measured values collected
- Planning the CAN messages for transmitting the measured values
- Iterative adjustment of the microcontroller code to the new CAN messages
- Cross-compilation from x64 to arm64
Sercan T.
Last position:
Co-Founder & Lead Software Architect at Pflege-Pfad
- Focus: system architecture, cloud-native platforms, microservices, API design
- Product: Pflege-Pfad is a digital matchmaking platform that connects relatives of people in need of care directly with verified care services and caregivers - without an agency and without ongoing fees.
- Business analysis & process design:
- Analysis of the German care market and identification of the key pain points of both target groups.
- Modeling of the core business processes: registration, verification, care request, application, placement, and rating.
- Definition of the business model as a freemium/premium model with optional contact unlocking.
- Creation of user stories and requirements documentation for relatives, care services, and administrators.
- Design of trust and quality assurance mechanisms with document upload, admin review process, and rating system.
- Coordination with stakeholders and validation of product decisions with potential users.
- Technical implementation:
- Design and implementation of the entire platform architecture as a solo developer.
- Design and implementation of a REST API with Spring Boot and Kotlin, including JWT-based authentication.
- Development of the frontend as a single-page application with Angular 17.
- Implementation of the AWS infrastructure with EC2, RDS PostgreSQL, S3, CloudFront, and IAM.
- Document upload with AWS S3 via presigned URLs for verification of care services.
- Email notifications via Resend API.
- AI-supported care service search via OpenAI API.
- Implementation of complete user flows such as registration, login, password reset, and placement process.
- Building an admin panel for user and care service management as well as analytics.
- CI/CD with GitHub Actions and containerized deployments with Docker.
- End-to-end tests with Playwright.
Technologies: Kotlin, Spring Boot 3, Spring Security, JWT, JPA/Hibernate, PostgreSQL, Angular 17, TypeScript, RxJS, AWS (EC2, ECS, S3, CloudFront CDN, RDS PostgreSQL, IAM), nginx, GitHub Actions, Playwright, Maven, Git, OpenAI API, Resend API, Docker, Scrum, i18n (DE/EN/TR), Kiro, feature-flag architecture.
Wael M.
Last position:
Test Manager at Schwarz IT
- Design, planning, and test case analysis
- Integration testing
- Coordination of UAT in the lab and on site
- Creation of HW and SW test catalogs
- Communication of test results from REST services with the SAP team
- Support for branches in the EU until rollout
- Coordination of defect management and SW updates with the involved vendors
- Checking the configuration of the charging stations in the backend software for different countries
- Continuous reporting of the quality status to project management
- Documentation of the user manual in English and German
- Tools: Confluence, be.Energised, OCPP Postman, OPI, CCV (payone.elavon), Excel, it4you
Carlos M.
Last position:
Implementation in Pimcore/Shopware
- Consulting, design, analysis, software architecture and development
- Designing, developing, and implementing a Pimcore environment and connecting multiple external API systems in a Kubernetes environment, as well as various PIM and ERP systems
- Technologies: Unix environment, design, Symfony development, PHP 8+, software architecture, MySQL/SQL, shell scripting, Git DevOps tasks, AI coding support, Pimcore 12, Shopware 6
- Team size: >10 people
Robin S.
Last position:
Senior Cloud & Backend Engineer at Media-Saturn-Holding GmbH
- Implementing applications with Kotlin and Ktor as microservices
- Using MongoDB in the MongoDB Atlas cloud
- Asynchronous communication of services via Google Pub/Sub
- Using Kotest and MockK for unit tests
- Developing an administration frontend with TypeScript, React and Express.js
- Provisioning environments in GCP using Terraform
- Implementing CI/CD processes with GitHub Actions
- Operating scalable production and test environments in GCP with Kubernetes, Helm and Flux CD
- Monitoring environments with Prometheus and Grafana
- Providing BI data in the Google BigQuery data warehouse
Lothar H.
Last position:
Solution Manager for PoC investigation and for replacing and refining an existing cloud and IoT power plant control system at Shell AG and NEXT Kraftwerke GmbH
- Investigating the PoC and replacing and refining an existing cloud and IoT power plant control solution for certificate management of renewable energy plants (solar, wind, biomass, etc.) for the largest European renewable energy network operator, including examining the field IoT devices and their integration and network connections, aiming for automated PKI key management.
- Messaging with Kubernetes for large API-connected enterprise applications
- Risk and attack vector analysis, software quality & bug assessments
- Agile workload scheduling via Jira & Confluence
- Evaluation of pub/sub message streams for MQ and Kafka.
- Various tests with “best design approaches” for resilience patterns like circuit breaker designs, throughput measurement and monitoring, bulkhead governors – for robust EA design
- Integration of API management with IBM's API Connect to Kubernetes for platform-agnostic microservices API management designs. Google Apigee
- Solution health check approaches for load burst situations + remedy
- Research and evaluation of potential sub-service providers in the coordinating role as solution manager. CIS20 controls.
- DREAD and STRIDE security assessments.
Ronald F.
Last position:
IT Consultant & Training at Various Small Projects & AI Training
- Development of multiple websites for small businesses (6)
- SEO/SEM
- Business Consulting (Implementation of ERP systems (Fresha / MS Dynamics))
- AI Tooling, Prompting & Coding
- GenAI Chatbot (GPT 4.0)
- Creation of a telephone agent (NLP services, Twilio, Python, Azure Services)
- Python coding, report & dashboard creation
- Stakeholder management and consulting throughout the project lifecycle
Training and Certifications in AI:
- Microsoft Azure AI Fundamentals
- Develop Gen AI Solutions with Azure Open AI Service
- Designing and Implementing a Microsoft Azure AI Solution
- Artificial Intelligence for the Business Professional
- Generative AI for the Business Professional
- Certified Artificial Intelligence Practitioner
Christian B.
Last position:
Principal Consultant (Self-employed) at BLOCH IT-Consulting
- Consulting services for Enterprise Service Management (Strategic Planning, Requirement Analysis, Tool evaluation process, implementation)
- Project management for ITSM tool implementations (Cloud, On-Premise)
- Optimization and maintenance of Ivanti Service Manager installations (User acceptance, efficiency, workflow configuration, CDMB structure, process automation, non-IT areas, roadmap planning, release upgrades)
- Presales support for Ivanti Service Manager (Product demonstrations, Proof of Concepts/POC, technical concepts)
Zouhair H.
Last position:
SAP S/4 HANA Developer at BGZ Essen
- Explorer phase: document preparations for development
- Getting started with the BTP documentation
- Documentation of WRICEFs
- Programming guidelines with consideration of Clean Core
- Analysis of customer programs to be migrated
- ABAP call monitoring (SCMON, SUSG)
- Creation of concept documents for the project
Ahmed F.
Last position:
Senior Lead Engineer (Freelance) at Atruvia AG
- Development of a wealth management application for investing in foreign currencies
- Full-stack development with Angular, Spring Boot, OpenShift, Oracle DB, Kafka
- Design and implementation of a microservice architecture
- Integration into Atruvia's BWS system and connection of multiple interfaces between Atruvia and DZ Privatbank
- Greenfield development of the application from the ground up
- Technical responsibility for architecture and interface design
- Close collaboration with business units and external stakeholders
Harald B.
Last position:
Software Architect at Amoria Bond
- Developed gateway demonstrator
- Defined system requirements for topology and data concentrator
- Designed zonal controllers for Leoni
Erol T.
Last position:
Continental AG
- Analyze and fix data flows between PMD and SAP HR/S4 systems using SAP PI/PO and ABAP, especially in the HR area.
- Provide integration services by developing, customizing, and troubleshooting issues in custom interfaces and processes.
- Participate in technical and functional discussions to align the HR system architecture and integration strategies.
- Ensure system stability and data accuracy by proactively identifying and resolving integration issues to contribute to ongoing project success.
- Transfer HR data via OData service to SuccessFactors ABAP-OO report: access LDAP user data alongside SAP user data and update the email address and Windows ID in SAP.
- S/4 HANA, ABAP/4, ABAP-Object, S/4 HR, FI, SoapUI, Postman, REST API, JSON.
Elvir B.
Last position:
Software Architect and Software Developer at Noctica IT GmbH
- NocTime time tracking, workshop planner, meal delivery service app
- LLM-based chat bot to control the NocTime time tracking system via voice input
- New and further development of customer solutions based on the Noctica SAS app framework
- Technologies: Java 17, Spring Boot, JPA, Hibernate, JavaScript, TypeScript, Angular 20, Angular Material, React, C#, Docker, Bash, Git, GitLab, RedMine, SQL, DBeaver, MariaDB, PostgreSQL, Python, TensorFlow, Ollama, various LLMs
Gerhard W.
Last position:
Self-employed Software Developer at Self-employed Software Developer
- OpenStreetMap integration for a logistics system at PTV Transport GmbH
- worked on portal software
- webshop system in PHP with login, shopping cart, order management, and PDF invoice module (AdminLTE)
- cashbook application for income-expense management (including export functions)
- helpdesk system with ticket management, user roles, and automatic notifications
Michael S.
Last position:
Consultant, Architect, Developer at Self-employed
Discover over 15,000 top freelancers
Statistics of experts using XML
Aggregated from the professional profiles of matched freelancers.
Experience
23 years
Position duration
2.2 years (Germany: 5.2 years)
Positions per freelancer
17 (Germany: 16)
Top business areas
Information Technology, Product Development, Quality Assurance
Top industries
Information Technology, Automotive, Manufacturing
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
100% (Germany: 88%)
Master's degree or higher
46% (Germany: 53%)
Certifications per freelancer
4 (Germany: 3)
Most common languages
German, English, French
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 Stuttgart 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 Stuttgart 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 (100%)
- Automotive (67%)
- Manufacturing (60%)
- Banking and Finance (53%)
- Professional Services (53%)
- Government and Administration (47%)
- Insurance (33%)
- Retail (33%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Structured Data Exchange and Document Standards
Extensible Markup Language remains a backbone for deterministic data storage and cross-system communication. Engineering teams rely on it to enforce rigorous document structures where precision cannot be compromised. It underpins crucial formats in electronic data interchange, office document architectures, and automotive engineering documentation.
Core Technologies and Schema Validation
- Schema definition and validation using XSD, DTD, and Schematron
- Transformation workflows powered by XSLT and XPath queries
- High-performance parsing with SAX, DOM, and StAX engines
- Web services protocols including SOAP and WSDL configurations
- Specialized industry standards such as ASAM, AUTOSAR, and openTRANS
Industrial Integration in the Stuttgart Region
The industrial landscape in Stuttgart relies heavily on standardized data exchange formats across automotive and manufacturing supply chains. Local enterprises handle vast amounts of telemetry, diagnostic files, and supplier interfaces through structured payloads. Specialists ensure that communication between tier suppliers and production systems remains reliable, compliant, and strictly validated.
Typical Migration and Transformation Scenarios
Organizations frequently modernise monolithic data architectures while maintaining interoperability with partner networks. Freelance specialists resolve bottlenecks where processing massive datasets consumes excessive memory or slows downstream pipelines. They construct reliable transformation layers that convert hierarchical document payloads into modern JSON formats or stream them into modern message brokers.
What Distinguishes Top Specialists
Outstanding professionals master streaming parsers and avoid memory-heavy object models when handling gigabyte-scale inputs. They write maintainable transformation scripts without recursive performance traps and know how to guard against security vulnerabilities like external entity attacks. Their deep understanding of enterprise namespaces prevents integration bugs before systems go live.
Collaboration and On-Site Alignment
Engagements often run effectively on a remote basis, especially for stylesheet authoring, parsing optimizations, and schema definition. For integration with proprietary manufacturing execution systems or hardware-in-the-loop environments around Stuttgart, hybrid setups allow professionals to validate data pipelines on-site while ensuring smooth English or German communication across cross-functional teams.
Frequently asked questions
Not sure where to start with XML? These answers cover the essentials.
A strong specialist in XML possesses deep knowledge of schema design using XSD, efficient tree querying via XPath, and robust transformations with XSLT. They understand the difference between event-based parsing like SAX and tree-based approaches like DOM to prevent memory overheads. Furthermore, they are adept at securing parsers against XXE vulnerabilities.
While JSON dominates web APIs, Extensible Markup Language offers formal document validation through schemas, comprehensive namespace isolation, and mature transformation tooling. Regulated industries, financial clearings, and automotive supply chains mandate these guarantees to ensure strict interface compliance.
Enterprises in the Stuttgart area frequently use XML within automotive diagnostic standards, machine configuration files, and electronic data interchange across suppliers. Specialist formats like AUTOSAR and ASAM definitions depend on structured markup to keep complex engineering pipelines aligned.
Yes, provided the transformation uses streaming techniques rather than loading the entire document tree into memory. An experienced professional optimizes XSLT processing or implements StAX parsers to stream gigabyte-sized files with minimal memory footprints.
Beyond raw XML parsing and schema construction, professionals typically bring strong backgrounds in Java, C#, or Python. They frequently work with message brokers, enterprise service buses, and relational databases where markup payloads are stored, parsed, and routed.
High-quality markup solutions emphasize modular XSD definitions, well-documented namespaces, and deterministic validation rules. When reviewing XSLT stylesheets, clean templates with targeted XPath expressions and explicit error-handling indicators highlight an expert's skill level.
Most architecture design, schema authoring, and transformation pipelines can be carried out fully remotely. However, projects that integrate directly with local manufacturing plant networks or automotive test benches in Stuttgart benefit from occasional on-site alignment during final commissioning.
A proficient specialist configures every parser to disable external entity resolution and external DTD processing entirely. When handling untrusted XML inputs, they enforce strict validation rules and ensure that parser configurations follow modern security guidelines.
The average hourly rate of freelancers in Stuttgart, Germany who have used XML 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 Stuttgart, Germany who have used XML in their recent projects, 100% hold at least a Bachelor's degree and 46% hold at least a Master's degree.
On average, freelancers in Stuttgart, Germany who have used XML in their recent projects have 23 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Stuttgart, Germany who have used XML in their recent projects are German (100%), English (100%), and French (40%).
The most common industries among freelancers in Stuttgart, Germany who have used XML in their recent projects are Information Technology (100%), Automotive (67%), and Manufacturing (60%).
The most common business areas among freelancers in Stuttgart, Germany who have used XML in their recent projects are Information Technology (100%), Product Development (87%), and Quality Assurance (73%).
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 
Dusseldorf 
Leipzig 
Dortmund 
Essen 
Nuremberg Request a free demo
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FRATCH CEO
