SAX Experts in Germany
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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 placement platform that directly connects relatives of people in need of care 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 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 the sole 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 using presigned URLs to verify 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 the placement process.
- Development of 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.
Minh D.
Last position:
Project Manager / Business Analyst / Application Manager at Finance and Insurance
Introduction of 5 different process applications for different teams
Release planning: scope and time management
Resource/capacity planning
Conducting Sprint Planning / retrospectives
Increment planning (several sprints)
Preparation of Steering Committee meetings / reporting to the Board
Coordination / alignment with external suppliers / deliveries
Resource planning for multiple projects
Coordination with business department and development team
Identification of best practices with IBM BAW
Cost control and planning for the project team and external service providers
Collection of KPIs using LogScale
Analysis of application errors with LogScale / Queries
User Story definitions / coordination of requirements with the business department and development team
Testing and defect tracking
UI/UX design of applications
Preparation and moderation of Brown-Paper workshops
Test concept, test data, test organization, test execution
Collection of team velocity / metrics
Test execution
Script for automated testing
Test organization with business department and IT
Recording and prioritization of defects
Establishment and operation of the application
Establishment of application monitoring with LogScale Dashboards
Checking health endpoints with PowerShell
Post Mortem analysis
Establishment of Incident Management
Establishment of Problem Management
Analysis of errors using LogScale Queries and Dashboard
Pre-processing of data for AI
Evaluation using AI language models (Meta Llama 3.3 LLM and deepset Haystack) and RAG
Installation of runtime environments for LLMs (Large Language Model)
Evaluation of various LLMs
Installation of RAG (Retrieval Augmented Generation) and integration with LLM
Extraction of 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
Markus B.
Last position:
Developer / DevOps, Consulting at A state authority in Baden-Württemberg / FSAS Technologies GmbH
Oracle Project Management and Automation
As part of the project, the operation of an Oracle infrastructure was automated by developing and enhancing Puppet modules and migrating existing Bash scripts to a standardized configuration management solution.
The aim of the project was to standardize and automate administrative processes, improve the maintainability of the Oracle platform, and increase the efficiency and traceability of infrastructure management through the use of Infrastructure as Code.
- Analysis and migration of existing Bash shell scripts to a Puppet-based automation solution
- Development and enhancement of Puppet modules for Oracle environments
- Automation of installation, configuration and operational processes using Infrastructure as Code
- Standardization and optimization of configuration management for Oracle systems
- Creation and maintenance of technical and operational documentation
- Planning, coordination and professional support during project implementation
- Operation and automation of Oracle systems on x86-based Linux server platforms
- Testing and quality assurance of the developed Puppet modules
- Analysis and resolution of technical errors as part of the automation and migration
- Close coordination with specialist departments and infrastructure teams to implement automation requirements
Technologies used: Puppet 7/8, SLES 15, Oracle 19, Oracle Grid, SVN, Windows Server, Confluence, VS Code, Ruby, Bash, Pass
Marvin M.
Last position:
Co-founder & CTO · Freelance Software Engineer (AI & SaaS) at Self-employed
- Self-employed · Berlin, Germany
- Co-founded the company and own the entire technical side: product architecture, backend, frontend, infrastructure and operations.
- Designed and built the Automated Booking System (ABS) as well as the core platform and payment logic.
- Development of AI-powered SaaS products, from architecture through backend and frontend to production operation.
- Technical consulting on product architecture, data protection and permissible automation.
- Building, running and monetising my own API products for AI agents, each available as a REST interface and as an MCP server.
- Full ownership of architecture, infrastructure, billing, legal texts and go-to-market.
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
Assessment of the current state
Evaluation of Redgate Flyway functionalities
Concept development
Products: Redgate Flyway, GitHub, Quest, Erwin Data Modeller, Oracle, Atlassian Jira, Atlassian Confluence
Knowledge: 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
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.
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, construction 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, Sping 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.
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.
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
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
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
Discover over 15,000 top freelancers
Statistics of experts using SAX
Aggregated from the professional profiles of matched freelancers.
Experience
25 years
Position duration
1.3 years
Positions per freelancer
24
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Automotive
Certification focus areas
Information Technology, Product Development, Business Intelligence
Bachelor's degree or higher
100%
Master's degree or higher
44%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
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 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 29 Oct 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 (85%)
- Automotive (62%)
- Transportation (62%)
- Manufacturing (62%)
- Insurance (54%)
- Government and Administration (54%)
- Education (46%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
XML event parsing
SAX, the Simple API for XML, is an event-driven approach to reading XML documents. Instead of loading a complete document into memory, a parser reports events such as element starts, text content and element ends to application handlers. This suits large, continuous or streamed XML input.
Core components
The central interfaces belong to SAX2 and include XMLReader, ContentHandler, ErrorHandler and EntityResolver. Professionals configure a SAXParser or XMLReader, register handlers and control features such as namespace processing, validation and external entity handling. Apache Xerces is a common parser implementation in Java environments.
Typical applications
- Import XML feeds, catalogues and transaction messages
- Transform large XML streams into database records or domain objects
- Validate structured documents during integration workflows
- Process SOAP payloads and legacy enterprise interfaces
- Filter, route or enrich XML without building a full document tree
SAX often appears in Java services, middleware, data migration tools and systems that exchange standards-based XML. It can also support custom pipelines where predictable memory use matters more than convenient random access.
When expertise helps
Companies bring in freelance SAX specialists when XML integrations are slow, fragile or difficult to maintain. They can replace ad hoc string handling, diagnose parser callbacks, introduce secure processing settings and connect XML events to existing business logic. In Germany, this work commonly touches enterprise integration, manufacturing, logistics and public-sector data exchange.
Skills around SAX
Strong professionals combine SAX with Java, XML Schema, namespaces, XPath and HTTP-based integration. They understand DOM and StAX well enough to choose the right parsing model, and they can work with JAXB, Spring integrations, SOAP or message brokers where the surrounding system requires it. Testing malformed input and handling encoding correctly are essential parts of the work.
Signs of quality
A capable specialist keeps handlers small, separates parsing from business rules and defines clear state transitions for nested elements. They manage character events correctly, handle namespaces explicitly and prevent external entity attacks. Good delivery includes tests for empty elements, mixed content, invalid documents, large inputs and parser errors, plus documentation that explains configuration choices and operational limits.
Frequently asked questions
Quick answers to the questions that come up most around SAX.
SAX is used to read XML as a sequence of parser events rather than as a complete in-memory tree. Companies use it for large feeds, integration messages, imports and streaming-style transformations where controlled memory use is important.
SAX pushes events to callback handlers and is efficient for forward-only processing. DOM provides random access to a complete tree, while StAX lets application code pull events when it is ready; the right choice depends on document size, navigation needs and control-flow preferences.
A strong SAX specialist should also understand Java XML APIs, namespaces, XML Schema, encoding and secure parser configuration. Experience with XPath, JAXB, SOAP, Spring integration or message brokers is useful when XML processing sits inside an enterprise workflow.
SAX itself has a focused API, but production work often involves legacy formats, nested state and difficult error cases. Look for a professional who can explain handler design, test malformed and large documents, and connect parser events cleanly to the surrounding application.
SAX work is generally well suited to remote collaboration because the key deliverables are code, tests, parser configuration and integration documentation. On-site sessions can still help when the XML flow connects to protected enterprise systems or teams that require close coordination in German.
Secure SAX configuration must address external entities, external schemas, entity expansion and unwanted network access. A specialist should configure the parser defensively, reject unsafe input where appropriate and include security-focused tests rather than relying on default settings.
SAX is less suitable when an application must move freely through the document, update nodes or run many queries over the same structure. DOM or a pull-based approach such as StAX may be easier when navigation and application-controlled flow matter more than event-driven streaming.
Review whether the SAX implementation handles namespaces, character chunks, mixed content, malformed input and parser failures deliberately. High-quality work separates callbacks from business logic, documents feature settings and includes tests that reflect the size and variability of real XML documents.
The average hourly rate of freelancers in Germany who have used SAX in their recent projects is 93 €, which corresponds to a daily rate of about 748 € 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 44% hold at least a Master's degree.
On average, freelancers in Germany who have used SAX in their recent projects have 25 years of professional experience, with a single engagement typically lasting around 1.3 years.
The most common languages among freelancers in Germany who have used SAX in their recent projects are German (100%), English (100%), and French (15%).
The most common industries among freelancers in Germany who have used SAX in their recent projects are Information Technology (100%), Banking and Finance (85%), and Automotive (62%).
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 (77%).
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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