Freelancer profile translated to English.
Back to original languageAbout Stephan
Senior Full-Stack Developer with over 15 years of experience in developing modern, scalable web applications. My focus is on JavaScript/TypeScript with React, Vue, and Node.js – complemented by in-depth knowledge of AWS, Docker, DDEV, and GitLab pipelines for stable CI/CD processes.
As a Technical Lead Developer, I have taken on technical responsibility in complex customer projects, designed scalable architectures, and provided technical guidance to development teams. My focus areas: SaaS platforms, B2B applications, complex dashboards, API development, headless architectures, and performance optimization.
Additionally, I work with modern AI/LLM integrations and support companies in the technical integration of intelligent functions into existing applications and platforms – e.g., AI-powered workflows, chatbots, automation, OpenAI API integrations, or Retrieval-Augmented Generation (RAG).
What you get with me: clean, maintainable code, well-thought-out architectural decisions, and a sparring partner who not only implements but also thinks along. Whether it's a greenfield project, legacy refactoring, architecture review, or temporary team augmentation – I deliver practical solutions that last.
Available for remote projects in German and English.
German
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- gjuce GmbHSenior Developer Technical LeadDIGITAL AND ITJanuary 2019 - Today (7 years and 7 months)Köln, GermanyAs a Technical Lead Developer, I took on technical responsibility in large projects and provided technical support to teams. My focus is on modern JavaScript technologies such as React, Vue, TypeScript, and Node.js. As a Certified Shopware Developer, I combine e-commerce expertise with experience in AWS, Docker, and GitLab pipelines to successfully implement scalable and performant applications.
- ticket i/O GmbHWeb DeveloperE-COMMERCESeptember 2017 - November 2018 (1 year and 2 months)Köln, GermanyAt ticket.io, I developed backend services with TypeScript and Node.js that extended and stabilized the ticketing system. Additionally, I developed an Android app for entry, which could be used to scan and validate tickets on-site.
- TriMeXaWeb DeveloperApril 2014 - September 2017 (3 years and 5 months)Leverkusen, GermanySupport for the development team of urlaubsguru.de in the maintenance and further development of the WordPress-based blog.
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Education
- Bachelor of ScienceCologne University of Applied Sciences2011Bachelor of Science
- Information Technology AssistantGeorg-Simon-Ohm-School Cologne2006Informations Technischer Assistent
Certifications
- Shopware 6 Certified Frontend DeveloperShopware