Freelance Full-Stack Developer E-commerce Focus

I am a freelance Senior Web and Full-Stack Developer with more than 17 years of experience in the development, integration, migration, and modernization of web applications, e-commerce platforms, publishing solutions, and business-critical systems.

My professional background covers the full lifecycle of web projects, from requirements analysis and technical design to implementation, system integration, migration, and long-term maintenance. I have worked on both customer-facing applications and internal business systems, with a strong focus on pragmatic, maintainable, and sustainable solutions.

E-Commerce & Web Platforms

I have worked extensively with Shopware, Magento, TYPO3, and Neos Flow. My projects range from custom shop functionality and frontend customization to complex system integrations and platform migrations.

Recent work includes:

• Shopware 6 development and maintenance

• Theme and frontend customization

• Custom business logic and workflow extensions

• API integrations using Shopware Admin API and Store API

• Migration of a TYPO3-based multi-shop system to Magento

• Continuous development of e-commerce and publishing platforms

API Development & System Integration

A significant part of my work involves connecting heterogeneous systems and automating business processes.

Examples include:

• Development of a PHP-based webhook system for Shopware order processing

• JSON processing and data transformation into XML for external systems

• Product synchronization between a custom Neos Flow application and Shopware

• Integration of third-party services through REST APIs

• Development of custom interfaces and data exchange processes

Backend Development

My backend experience includes PHP, Java (Spring Framework), MySQL, data processing, business logic implementation, and database-driven applications.

I have also been involved in migration and modernization projects, including TYPO3 upgrades and the migration of business data from FileMaker to SAP.

Frontend Development

I develop and maintain web frontends using JavaScript, HTML, CSS, TypeScript, and React. My frontend work focuses on responsive user interfaces, usability, and the integration of frontend components into existing business applications and web platforms.

Process Optimization & Automation

Many of my projects involve improving operational efficiency through automation and system integration. Typical tasks include:

• Workflow automation

• Data migration and synchronization

• Integration of business systems

• Optimization of order and publishing processes

• Technical analysis and solution design

To improve productivity and code quality, I use AI-assisted development workflows for analysis, implementation, migration support, refactoring, and documentation.

Key Technologies:

PHP • JavaScript • TypeScript • React • Java (Spring Framework) • MySQL • Shopware • TYPO3 • Magento • Neos Flow • REST APIs