Projects

Selected Work

A selection of client projects and own products. From enterprise frontends to standalone backends to apps in the app store.

Highlights

04/2026 – present

LLM-based Quality Evaluation for Technical Documentation

Design and implementation of an evaluation pipeline that automatically assesses AI-generated technical documents against defined quality criteria, built as an extension to an internal developer platform. Rubric-based scoring following LLM-as-a-Judge / G-Eval methodology, using a separate judge model to avoid self-enhancement bias. Two-phase architecture combining offline calibration and online evaluation, with domain systems connected via MCP tools.

AI Engineer
Node.js
TypeScript
LLM APIs
MCP
Rubric-based Evaluation
Mermaid
10/2025 – present

Backend API Development for Global E-Commerce Platform

Development and maintenance of backend APIs integrating internal systems and external services for the Siemens Xcelerator platform. Service architecture built with Node.js and NestJS, deployed across 5 environments on AWS. Monitoring and quality assurance via Datadog, Swagger, and SonarQube.

Backend Developer
Node.js
NestJS
TypeScript
AWS
Salesforce
Datadog
Swagger
SonarQube
Scrum
11/2024 – 09/2025

Frontend Development for Siemens Xcelerator E-Commerce Platform

Development and maintenance of the frontend for the globally used Siemens Xcelerator platform within a distributed international team. Vue.js and Pinia as core frontend technologies, integrated with AEM for content management and Salesforce for customer data.

Frontend Developer
Vue.js
Pinia
TypeScript
Node.js
Scrum
Salesforce
AEM
07/2024 – 05/2025

Mobile App for Shopping Planning and Household Organization

Full-stack development of a hybrid mobile app for shopping planning with shared shopping lists, recipe management, and weekly planning. OpenAI integration for intelligent recipe suggestions. Capacitor for native iOS/Android builds, CouchDB as backend database.

Full Stack Developer
Vue.js
Capacitor
SQLite
Node.js
Express.js
CouchDB
Vitest
TailwindCSS
OpenAI
Shadcn
09/2022 – 09/2023

Corporate Carbon Footprint Web Application

Complete overhaul and architecture migration of a web application for calculating corporate carbon footprints. Built a reusable component library and introduced structured state management for improved maintainability and performance.

Lead Frontend Developer
Nuxt.js
Buefy
Vuex
Jest
Cypress

More Projects

02/2025 – 12/2025

Backend Development of a Multi-Tenant Event Management Tool

Backend Developer
10/2023 – 06/2024

Full-Stack Development of a Multi-Tenant TYPO3 Partner Portal

Full Stack Software Engineer
04/2024 – 07/2024

Relaunch of a Price Comparison Site to Version 2.0

Frontend Developer
09/2023 – 04/2024

SEO-Optimized Price Comparison Site with Nuxt.js and Strapi

Lead Frontend Developer
12/2022 – 04/2023

Search Solution for Emission Data with ElasticSearch

Full Stack Software Engineer
01/2023 – 07/2023

Performance Optimization of an Offline-First Web Application

Lead Frontend Developer
09/2022 – 06/2023

Modernization of a Technical Database (Oracle Forms Replacement)

Lead Frontend Developer
05/2021 – 09/2022

Travel Companion App (PWA / iOS / Android)

Lead Developer
07/2021 – 02/2022

Website Relaunch with Integrated Job Portal

Full Stack Software Engineer
10/2021 – 04/2022

Gold Purchase App (iOS / Android)

Lead Frontend Developer
02/2021 – 03/2022

Digitization of Public Transport Driver Communication

Lead Frontend Developer
2017 – 2022

Long-Term Development of an Energy Provider Web Platform

Full Stack Software Engineer
2017 – 2020

Precious Metal Price App (iOS / Android)

Full Stack Software Engineer
2018 – 2019

Metrics and Monitoring Web Application

Full Stack Software Engineer
2015 – 2018

Workflow Manager for Process Optimization

Full Stack Software Engineer
2016 – 2017

Fintech App (iOS / Android)

Frontend Developer

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