Freelancer profile translated to English.

Description

Fullstack Developer with over 8 years of experience, specializing in building scalable, production-ready web applications.

My technical expertise ranges from web (React, Svelte) to mobile (React Native, Cordova) and backend systems (Node.js, Express).

A special focus is on cloud architectures and the integration of modern AI systems. This includes in particular LLM-based applications, Retrieval-Augmented Generation (RAG), AI agents, and the connection of external AI APIs into existing products and workflows.

Additionally, I have in-depth experience in infrastructure and DevOps topics such as CI/CD, app signing, app store deployments, and operating scalable services.

Beyond pure implementation, my strengths lie in conceptual design, technical planning, and rapid prototyping, especially in early product and MVP phases.

Languages

German
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Stuttgart (up to 50km)

LawGames GmbH
Interim CTO
PUBLIC SAFETY
September 2025 - January 2026 (4 months)
Starnberg, Germany
Co-designed a new white-label learning platform from scratch in close collaboration with the business owner, including translating business requirements into a scalable technical architecture.

Responsible for end-to-end architectural decisions, including multi-tenancy vs. single-tenancy, CMS design, data separation, scalability, and deployment strategies.

Primary technical advisor, evaluating feasibility, trade-offs, and long-term maintainability of all platform decisions.

Independently implemented the entire platform stack from scratch, including CMS, backend services, and client applications.

Developed a white-label CMS that allows clients to manage their own content and deliver it to branded client apps for end-users.

Developed and maintained the React Native app, with significant contributions to UI/UX design and user experience.

Developed an AI-powered tutor using RAG technology, querying over 22,000 legal documents and drawing conclusions.

Designed and operated the complete cloud infrastructure on Google Cloud Platform (Cloud Run, VMs, Load Balancing, Backups).

Architected and implemented a robust CI/CD pipeline with separate development, staging, and production environments, reducing release cycles by over 65% and enabling automated app store deployments.
Next.js React.js React Native Google Cloud LLM
LawGames GmbH
Lead Architect & Mobile Developer
PUBLIC SAFETY
September 2024 - May 2025 (8 months)
Starnberg, Germany
Improved the internal app search functionality, reducing response times for end-users by 93%.

Developed an interactive AI bot that enables users to effectively learn legal definitions.

Conceived and implemented an AI tutor using modern AI and RAG technologies, querying over 22,000 documents to provide qualified legal answers.

Optimized overall application performance through targeted refactoring and performance improvements.

Significant contributions to UI/UX design and development of the React Native app.

Managed and maintained the Google Cloud Platform infrastructure, including setting up and deploying VMs, configuring and operating Cloud Run services, and implementing load balancing and backup strategies.

Architected and implemented a comprehensive CI/CD pipeline, reducing release times by two-thirds by introducing separate development, testing, and production environments, as well as automated app store deployments.

Key role in planning and architecture of new application features.
React Native Google Cloud Artificial Intelligence LLM OpenAI
Plana Earth GmbH
Senior Full-stack Developer
ENVIRONMENTAL
March 2024 - June 2025 (1 year and 3 months)
Berlin, Germany
Technical leadership and coordination of a team of 1-5 people.

Developed a responsive micro-frontend based on a modern Single-SPA architecture.

Implemented a comprehensive test suite following the Test-Driven Development (TDD) principle.

Refactored and optimized the frontend architecture to improve scalability and maintainability.

Close collaboration with cross-functional teams (Frontend, Backend, Data, Design, Product) for pragmatic decision-making and co-shaping technology and architecture decisions.

Optimized the release process by introducing multiple CI/CD pipelines to automate deployments.
Frontend Typescript React.js Software as a Service (SaaS) TailwindCSS