SAX Experts in Germany
for reliable XML processing, matched in minutes with vetted professionalsHire experts who design event-driven XML parsers, handle namespaces and validation, and integrate SAX with Java services and data pipelines. FRATCH finds precise matches quickly among vetted, available freelancers.
Meet FRATCH Experts in Germany, who have recently used SAX
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.
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
Jorge E.
Last position:
Bittrich & Bittrich
- Extension and maintenance of the Doktree tax advisory document management tool
- Alfresco and Angular development
- Linux system maintenance
Minh D.
Last position:
Project Manager / Business Analyst / Application Manager at Finance and Insurance
Introducing 5 different process applications for various teams
Release planning: scope and time management
Resource/capacity planning
Conducting sprint planning / retrospectives
Increment planning (multiple sprints)
Preparing steering committee meetings / reporting to the executive board
Coordinating / aligning with external suppliers / deliveries
Multi-project resource planning
Aligning with the business unit and development team
Identifying best practices with IBM BAW
Cost control and planning for the project team and external service providers
Collecting KPIs using LogScale
Analyzing application errors with LogScale / queries
Defining user stories / aligning requirements with the business unit and development team
Testing and defect tracking
UI/UX design of the application
Preparing and facilitating brown-paper workshop
Test concept, test data, test organization, test execution
Recording team velocity / metrics
Executing tests
Scripts for automated testing
Organizing tests with the business unit and IT
Recording and prioritizing defects
Setting up and operating the application
Setting up application monitoring with LogScale dashboards
Checking health endpoints with PowerShell
Post mortem analysis
Setting up incident management
Setting up problem management
Analyzing errors using LogScale queries and dashboard
Pre-processing data for AI
Conducting evaluation with AI language models (Meta Llama 3.3 LLM and deepset Haystack) and RAG
Installing runtime environments for LLMs (large language model)
Evaluating various LLMs
Installing RAG (retrieval augmented generation) and integrating with LLM
Extracting unstructured data with LLM and RAG
Project based on IBM BAW (Business Automation Workflow), WebSphere Liberty, Domea, d.3, REST, LogScale (formerly Humio), Swagger, PowerShell, JIRA, Confluence, Lucom Interaction Platform (LIP), Mattermost, Jabber
Allal K.
Last position:
Java Senior Full Stack Developer at Insurance ÖRAG
- Further development of a policy administration system (contract/claims) for the legal expenses insurer ÖRAG.
- My role: Senior Software Developer.
- The team consists of 12 developers.
- Technologies used: Java 8/21, Java EE, Quarkus, WebLogic, JPA, RabbitMQ, JTA, CI, CD, Jenkins, DB2, Maven, Jenkins, GIT (bitbucket) later GitLab, Junit, Elasticsearch, Mockito, Jira, SonarQube, Scrum, React, Workflow
- Migration and modernization of legacy systems: rewrote C and C++ code in Java to improve maintainability, scalability, and performance. Refactored Python into Java, including optimization and integration into modern architectures.
- Study on the use of AI (Codex) for implementing a Java feature. The goal is to compare the time spent and productivity of AI-supported development with a classic implementation by a developer. The results should show how strongly the use of AI affects development time and efficiency.
- Development of the following tariff calculators for the years 2024/2026: private, companies, doctors, farmers, owner-occupied G + H, landlords, traffic, club, top managers, sales representatives, special criminal law, savings bank, municipal, BayGT, doctors, Dehoga
Sridhar H.
Last position:
SAP CX Consultant at Anonymous
- Stack: SAP Commerce 2011 (B2C).
- Migrating the data from Stibo system to SAP Commerce Cloud.
- Mapping the data from Stibo system to SAP Commerce Cloud.
- Integrating hot folders to support multiple countries and languages.
- Integrating validation tools for migrated data and generating validation reports.
Michael D.
Last position:
Consultant Software Architect at Railway Systems Company
- Model based UML software design for safety critical level SIL-4 interlocking rail traffic system, according to CENELEC 50128 and IEC 62279 standards.
- Skills: CENELEC 50128, IEC 62279, UML Rhapsody code generation, IBM Engineering Workflow Management (EWM), DNG RM requirements tool, Design Patterns, software functional safety, Risk Control Measures, SCRUM.
Ronny E.
Last position:
IT Consultant at MINT Kooperative eG
- GUI test automation with Squish
- Requirements management with DOORS
- Code reviews according to MISRA and AUTOSAR
Ulrich C.
Last position:
Java Architect/Developer – Freelancer at DHL/DP – Rentenservice
Implementation of a Java service (daemon) as part of the automated processing of death notifications
Technologies used: Java17, SpringBoot, Hexagonal Architecture, REST API, Oracle, Maven, SonarQube, FindBugs, Checkstyle
Sven H.
Last position:
Contract Management Workflow Application
- Architecture, review, consultation and development of a contract management workflow application
- Development of a JSF-based platform (XPages) for coordinating new products from partners' initial ideas to contract execution with clients
- Generation of contract documents based on the agreements reached
- Implementation of workflows with approval processes
- Use of Lotus Notes, Java, JSF, XPages, JavaScript, REST, Apache POI, PDF Box, Bootstrap, Selenium, JUnit and Swagger
- Development on Windows and Linux platforms
Ioan D.
Last position:
Senior Software Developer at ING
- Tribe Home, Product Area 4 - Customer in Life, Squad Cybertron.
- Analysis, design, development, and testing of new requirements for Optimmo, mortgage financing software.
- Analysis, design, development, and testing of the JEE application MWS kredit-baufi.
- Analysis, design, development, and testing of the Wicket Optimmo application.
- Analysis, design, development, and testing of kredit-baufi batch programs.
- Migration of kredit-baufi batches to RHEL9.
- CiL SCS consumer pacts with Finagle.
- CiL SCS touch point architecture integration.
- Team size: 10.
- Tools / Frameworks: OpenJDK Java 17, Kotlin 1.6.0, Azure, Jenkins, Stash, JEE, GitLab, JIRA, Confluence, git, Spring 6.0, Spring Cloud, Spring Data, Hibernate, JPA, JMS, Kafka, Oracle, PL/SQL, Red Hat Enterprise Linux (RHEL), Maven, REST, JBoss, IntelliJ IDEA, Wicket 9 and 10, Istio.
Discover over 15,000 top freelancers
Statistics of experts using SAX
Aggregated from the professional profiles of matched freelancers.
Experience
27 years
Position duration
1.5 years
Positions per freelancer
24
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Transportation
Certification focus areas
Information Technology, Product Development, Business Intelligence
Bachelor's degree or higher
100%
Master's degree or higher
57%
Certifications per freelancer
2
Most common languages
German, English, Arabic
Speak two or more languages
100%
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 SAX
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.
SAX 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 (82%)
- Transportation (73%)
- Automotive (64%)
- Insurance (64%)
- Manufacturing (64%)
- Government and Administration (55%)
- Education (45%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
XML Event Processing
SAX, short for Simple API for XML, is an event-driven interface for reading XML documents. Instead of loading a complete document into memory, a parser reports events such as element starts, text nodes and element ends to application-defined handlers. This makes SAX useful for large files, streaming imports and controlled server-side processing.
Parsers and Handlers
SAX work often centres on configuring a SAXParser, XMLReader or SAX2-compatible parser and connecting the right handlers. Specialists implement ContentHandler, ErrorHandler and EntityResolver logic, manage parser features, and translate XML events into domain objects, messages or database records. Careful state management is essential because events arrive in sequence.
Where SAX Fits
- Process large XML feeds without building a full in-memory tree
- Import invoices, product data, catalogues and structured business documents
- Validate XML against schemas and report useful parsing errors
- Connect XML integrations with Java services, queues and databases
- Filter or transform selected content during a streaming read
SAX is common in Java-based integration systems, document workflows and legacy enterprise applications. It can also support custom ingestion tools where predictable memory use matters more than convenient random access.
SAX and Its Alternatives
DOM creates a navigable tree and suits applications that must revisit or modify many nodes, but it can consume more memory. StAX offers pull-based streaming, giving application code more control over when events are read. A strong specialist selects the model based on document size, access patterns, validation needs and the surrounding XML library rather than treating SAX as a universal default.
When Expertise Helps
Companies bring in freelance SAX specialists when an XML integration is slow, fragile or difficult to extend. They can replace ad hoc string handling, diagnose namespace and encoding problems, harden parsers against unsafe external entities, and connect incoming documents to existing business logic. In Germany, this expertise can support remote teams as well as regulated manufacturing, logistics and financial workflows that still rely on XML exchange.
What Strong Specialists Deliver
Effective SAX professionals understand XML namespaces, schemas, encodings, XPath concepts and Java exception handling alongside the API itself. They create test fixtures for malformed and unusually large documents, define clear handler boundaries and document parser configuration. They also review throughput, memory behaviour, observability and security so the resulting integration remains maintainable after handover.
Frequently asked questions
Quick answers to the questions that come up most around SAX.
SAX is used to read XML as a sequence of parsing events rather than as a complete document tree. Companies use it for large imports, partner integrations, message processing and document workflows where controlled memory use and sequential processing are important.
SAX uses callback handlers, while DOM builds an in-memory tree and StAX lets application code pull events from the parser. SAX can be a good fit for straightforward forward-only processing, but DOM is easier for random access and StAX may offer more explicit flow control.
A strong SAX specialist usually understands XML namespaces, XSD validation, character encodings, Java exception handling and integration patterns. Experience with DOM, StAX, XPath, message queues and databases is also useful when XML parsing is part of a wider data flow.
SAX expertise is valuable when documents are large, imports run under memory pressure, or parser behaviour is hard to diagnose. It is also useful when a team must replace unsafe XML handling, support complex namespaces or connect legacy XML interfaces with modern services.
SAX work is often suitable for remote collaboration because parser code, test files and integration contracts can be reviewed online. On-site work may help when the specialist must inspect internal systems, coordinate with operations teams or handle sensitive document flows, while clear technical English or German supports smooth delivery.
Ask a SAX freelancer to explain handler state, error recovery, namespace processing and protection against external entity attacks. Review tests for malformed XML, large inputs and encoding edge cases, then ask how the design will be monitored and maintained after release.
SAX parsers can be configured for validation and can report parsing or schema-related errors through dedicated handlers. The exact capabilities depend on the parser and validation setup, so a specialist should clarify the schema language, error policy and expected behaviour for invalid documents.
Before taking on SAX work, freelancers should clarify the XML contract, namespace rules, document volume, encoding, validation requirements and downstream data model. They should also confirm security constraints, sample files, deployment context and whether the project expects callbacks, pull-based parsing or a different XML approach.
The average hourly rate of freelancers in Germany who have used SAX in their recent projects is 92 €, which corresponds to a daily rate of about 737 € based on an 8-hour working day.
Of the freelancers in Germany who have used SAX in their recent projects, 100% hold at least a Bachelor's degree and 57% hold at least a Master's degree.
On average, freelancers in Germany who have used SAX in their recent projects have 27 years of professional experience, with a single engagement typically lasting around 1.5 years.
The most common languages among freelancers in Germany who have used SAX in their recent projects are German (100%), English (100%), and Arabic (9%).
The most common industries among freelancers in Germany who have used SAX in their recent projects are Information Technology (100%), Banking and Finance (82%), and Transportation (73%).
The most common business areas among freelancers in Germany who have used SAX in their recent projects are Information Technology (100%), Product Development (100%), and Project Management (73%).
Main locations of FRATCH Experts, who have recently used SAX
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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Philipp Thomaschewski
FRATCH CEO
