Hi, I'm
Hans Otto
I'm a software engineer from Antwerp, Belgium.
I have a passion for programming, solving complex problems, and learning new things.
I'm the co-founder and CTO of BubblyDoo, a company that creates personalized products for children.
AltVelo
2025
An alternative app for the Antwerp Velo.
BubblyDoo
2018 - present
CTO and Co-Founder of BubblyDoo, an e-commerce startup creating personalized products for children.
Spices.app
2022, 2025
A creative project generating spice labels for your kitchen.
3D Hanzi Generator
2021 - 2022
A tool for generating 3D models of Chinese characters.
angular-react
2022 - 2023
A library for using Angular in React and React in Angular.
React Done Tracker
2023
A library that makes it easy to track the async state of a React tree.
GraphQL Workers Subscriptions
2023
A library/framework built on Cloudflare Workers providing distributed, topic-based GraphQL subscriptions.
Zoemin Website
2018
A website for Zoemin, a photographer (also my mom).
s[MAS]h!
2017
An app for the MAS museum' Masked event.
BN Classic Website
2016 - 2017, 2025
A website for BN Classic, a yearly running event in Belgium.
Learning Chinese
2018 - present
Me learning Mandarin Chinese.
LP50xx Breakout Board
2019
A breakout board for the LP50xx series of LED drivers.
Wall-mounted computer
2018 - 2021
An art project in which I took a computer and mounted it on a board on the wall.
3D Printing
Me 3D printing stuff.
Treehouse
2011 - 2015
A treehouse I modeled & built as a kid.
Lego Antwerp MOC
2023 - 2025
A custom Lego model of the Antwerp skyline.
UAntwerp Snapchat Filters
2018
Snapchat filters for the University of Antwerp.
Ottomatisch
2016 - 2023
My one-person company for freelance work.
BubblyDoo Renderer
2018 - present
The in-house renderer for BubblyDoo.
BubblyDoo Website
2018 - present
The website for BubblyDoo.
BubblyDoo Data Pipeline
2022 - present
The data pipeline for BubblyDoo.
Arbiter
A high frequency scraping tool and analyzer.