Projects

A collection of professional and personal projects I've worked on over the years.

Featured Projects

Streamlit

2021-2025

Lead engineer on the open-source Python library for building data apps. Helped grow from 30k to 1.2 million monthly active developers.

Lead Engineer
Python React TypeScript Open-source Data Apps

Snowflake Intelligence

2025

Helped bootstrap Snowflake's AI-powered analytics product from the ground up, focused on data visualization capabilities.

Software Engineer
TypeScript Data Visualization AI Analytics

Glide Data Grid

2022-2025

A high-performance React data grid component with rich editing capabilities and smooth scrolling for millions of rows.

Maintainer
React TypeScript Open-source

Machine Learning Studio

2017-2021

End-to-end collaborative development platform used internally at SAP to build, run, and scale machine learning solutions.

Lead Software Engineer & Architect
Azure Docker Kubernetes Machine Learning Python +2

Machine Learning Tooling

2018-2021

A collection of open-source machine learning tools to boost developer productivity. With many thousands of Github stars, downloads, and users.

Creator & Lead Developer
Docker Kubernetes Machine Learning Open-source Python +1

Corona Warn App

2020

Part of the team that bootstrapped the open-source Corona-Warn-App project at SAP - the official Covid19 app of Germany with 28 million downloads.

Open-source Management & Architecture
Architecture Open-source

Enterprise Knowledge Graph

2013-2019

Pioneered Knowledge Graph technology in the enterprise context, combining knowledge graphs with NLP and search technologies.

Lead Software Engineer & Architect
Docker GraphQL Java Knowledge Graphs Machine Learning +3

Other Projects

Machine Learning Workspace

2018-2021

All-in-one web-based IDE specialized for machine learning and data science. Over 2k stars on GitHub and more than 800k downloads.

Creator & Lead Developer
Docker Jupyter Open-source Python

Opyrator

2021

Open-source tool that turns Python functions into microservices with web API, interactive GUI, and more.

Creator & Lead Developer
Machine Learning Open-source Python

Best-of Lists

2020

A tool to collect and generate lists of awesome libraries and tools. Lists are automatically ranked and updated.

Creator & Lead Developer
Open-source Python

Next-gen Enterprise Search

2015-2019

A next-generation internal search application for companies, built on advanced knowledge graph and search technology.

Lead Software Engineer & Architect
Docker Java Knowledge Graphs Machine Learning NLP +2

Ticket Intelligence & Automation

2017-2019

Built the first ML system for automating SAP's internal ticket systems with millions of tickets.

Machine Learning Engineer & Data Scientist
Machine Learning NLP Python Recommender Systems

Deep Learning Berlin Meetup

2016-2018

A meetup group for Berlin's Deep Learning community to discuss recent research, applications, tools, and projects.

Initiator & Organizer
Community Deep Learning

Conversational Business Assistant

2015-2017

Concept and implementation of a proactive digital assistant for the enterprise.

Student - Master Thesis
Conversational AI Knowledge Graphs Machine Learning NLP Python

Newsstack

2016

A simple news aggregator with smart features and a Tinder-like interface.

Student - Personal Project
Java Machine Learning Mobile Development

PokeFinder for Pokémon GO

2016

Mobile app to help Pokémon GO players find rare Pokémon. Scaled from 0 to 500k daily active users within a week.

Student - Personal Project
GCP Java Mobile Development

Drop

2014-2015

A location-based social network that scaled to 10k users, later pivoted to a social travel journal.

Student - Personal Project
GCP Java Mobile Development

SAP cFolders

2012-2013

Implemented native mobile applications for SAP cFolders, a collaborative information sharing system.

Student - Internship
Java Mobile Development Objective-C

Tibia for PSP

2007-2010

Homebrew MMORPG game for PSP with more than 100k downloads. My first self-taught programming project.

Student - Personal Project
C/C++ Game Development