From software developer to entrepreneur and back to what I enjoy most: building software and solving complex technical challenges.
I am a software developer, architect and entrepreneur with more than 25 years of professional experience in software development, enterprise integration and digital product delivery.
Professional Focus
My professional focus is modern backend development, software architecture and AI-powered applications.
I enjoy designing scalable backend systems, integrating enterprise platforms and applying AI technologies to solve real-world business problems.
Whether working as part of a development team, leading technical initiatives or contributing as an external expert, my goal is always the same: building reliable, maintainable and intelligent software that creates long-term value.
Backend Development
Java, Quarkus, Spring, Struts, REST APIs, microservices, enterprise integration and backend platforms.
Software Architecture
Pragmatic architecture, scalable systems, integrations and maintainable software solutions.
AI Applications
LLMs, local AI assistants, Whisper, RAG concepts and AI-powered business workflows.
Current Technology Focus
Backend: Java 21+, Quarkus, Spring, Struts, REST APIs, JAX-RS, Microservices, OAuth2, JWT
Cloud & Infrastructure: Docker, AWS S3, AWS SQS, Linux, macOS, containerized deployments
Build, CI/CD & Quality: Gradle, Maven, Git, GitLab CI/CD, Jenkins, JUnit, Checkstyle, SonarQube, Code Reviews
Databases & Data Processing: PostgreSQL, MariaDB, MySQL, Oracle, DB2, MS SQL Server, JSON, XML, CSV processing, data migration and transformation
AI & Emerging Tech: Large Language Models, LM Studio, Whisper, Speech-to-Text, Text-to-Speech, Prompt Engineering, RAG concepts, local AI infrastructure
Enterprise Experience: CMS platforms, media and publishing systems, Jive, SharePoint, Hibernate, Tomcat, WebSphere, JBoss / WildFly, JSP, JSF, Struts
AI Experience
My focus is not on training foundation models, but on integrating AI into real-world applications, workflows and enterprise systems.
- Built local AI assistants using Large Language Models
- Integrated Whisper-based Speech-to-Text
- Implemented Text-to-Speech workflows
- Worked with LM Studio and locally hosted models
- Designed conversational workflows and session handling
- Explored RAG-style knowledge systems
- Built Python-based AI prototypes and tools
My goal is to combine more than 25 years of software engineering experience with modern AI technologies to build intelligent, reliable and maintainable software solutions.
Recent Projects
Since 07/2024 – Java Backend Developer, eThinking GmbH
Backend development for large CMS-based websites and media platforms using Java, Quarkus, REST APIs, Docker, Gradle and GitLab CI/CD.
07/2023 – 05/2024 – Schaeffler: Intranet Data Migration
Migration of an intranet platform for approximately 80,000 employees from Jive to SharePoint. Development of Python-based migration scripts using REST APIs, OAuth2, JSON export, link rewriting and content transformation.
10/2022 – 07/2023 – Porsche: Intranet Upgrade
Upgrade and customization of a Jive-based intranet platform using Java, Spring, Struts, HTML, CSS, Freemarker and Soy templates.
Professional Background
- Started programming at age 14
- Sold first software at age 16
- Studied Computer Science at the Technical University of Berlin
- Worked as developer, senior developer, architect, consultant, technical lead, product manager and CEO
- Founded and managed a software company with up to 30 employees
- Worked on more than 100 software projects
- Now focused again on hands-on backend and AI application development
Selected Customers
Adidas · Allianz · Audi · Schaeffler · Porsche · Daimler · Deutsche Bank · Deutsche Telekom · Jive Software · RTL.de · T-Systems · Coca Cola
Beyond Technology
My experience as both software engineer and entrepreneur allows me to understand technical challenges from multiple perspectives.
I value simplicity, reliability and collaboration, and I enjoy building software that creates lasting value for both users and businesses.