Portfolio

Projects

Software for rail operations, industry, automotive and e-commerce – each with my role and a look at the implementation.

Digitaler Befehl application views: order overview, composing a written order and a checked order message.

since 2023

Full-Stack Engineer → Technical Product Owner

Digitaler Befehl

BVU / DB InfraGO

Progressive web app by DB InfraGO and BVU for transmitting written operating orders digitally in rail operations – run in Deutsche Bahn's cloud environment.

My contribution

Frontend and backend development with React, TypeScript, Kotlin and Quarkus
As Technical Product Owner: architecture decisions, backlog refinement and sprint planning
Mentoring and code reviews within the development team

React
TypeScript
Kotlin
Quarkus
PostgreSQL
Docker

Automated production line with an operator terminal in an industrial hall

2021–2023

Full-Stack Engineer

Web Tooling for Safety Sensors

SICK AG

Web-based configuration and diagnostic tools for industrial safety sensors and robotics – on a reusable foundation for several product and brand variants.

My contribution

Modeled configuration logic as explicit, testable state machines with XState
Frontend in Angular, backend services in NestJS
Data access through TypeORM and PostgreSQL

Angular
NestJS
XState
TypeScript

Close-up of a wristwatch against a dark background

12/2018–06/2020

Frontend Engineer

Live Marketplace Frontend Migration

Chrono24

Incremental migration of the frontend from jQuery to Vue.js – while the international luxury watch marketplace kept running.

My contribution

Built new Vue.js components for existing page areas
Migrated jQuery-based areas step by step – no big bang
Coordination within and across several Scrum teams

Vue.js
TypeScript
jQuery
SCSS

Illuminated digital car cockpit with speedometer and trip computer

2016–2017

Frontend Engineer

VW Car-Net Customer Portal

Volkswagen AG

Customer web portal for Volkswagen's Car-Net connected-car platform: vehicle status, remote control and service booking in the browser.

My contribution

Further development of the Car-Net web portal on site in Wolfsburg
Automated Selenium tests for core portal flows
Work within internal Scrum processes

AngularJS
JavaScript
Java
REST APIs
Selenium

All projects

Most recent first, with period, role and focus. Each entry links to the full case study.

My own software

Alongside client work, I build and run my own tools. They grew out of day-to-day operations at a print-on-demand retailer – architecture, development and operations are my responsibility.

Read the case study

DTF order automation
Import orders from Amazon and eBay, generate print files, create invoices and DHL shipping data.
PHP · Symfony · Chromium
Amazon Listings Manager
Desktop app: load catalog reports, edit them in a spreadsheet grid and upload changes through the Selling Partner API.
Rust · Tauri · React
Shipping data converter
Converts DHL shipping data into Amazon- and eBay-compatible formats – as a single program without a runtime service.
Go · Cross-Platform