Calucon

Explore. Create. Move.

HCI · VR/AR · Full-stack

Hi, I’m Simon. I study how people move and point in virtual spaces, and I build the software around it.

A collection of HCI, VR/AR and full-stack projects, from locomotion research in VR to a retrofitted vintage radio.

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About me

M.Sc. HCI, University of KonstanzFull-Stack Developer, FastRocket GmbH

Illustrated portrait of Simon Schwitz, wearing glasses and a burgundy t-shirt, standing in front of green foliage

Selected work

Seven projects, from the lab to the web

VR locomotion research, a two-player puzzle game, an exhibition backend, a radio that travels in time, a toolkit for cross-reality prototyping. And one WordPress plugin you can install today.

WordPress plugin · on wordpress.org

Calucon Third-Party Embed Gate

Holds YouTube, maps and social embeds until a visitor asks for them, so a site needs no cookie banner. Nothing third-party loads before the click.

Version 1.0.0WordPress 5.9+PHP 7.4+GPLv2Free

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See it working

Open source

Colibri

The HCI Group’s toolkit for syncing objects and data between apps in cross-reality prototypes. Patches in 2024, most of Colibri 2 in 2026.

TypeScriptNode.jsUnity

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Diagram of redirected walking in VR showing a straight arrow and a curved arrow below a VR headset

VR research

Redirected Walking

Locomotion redirection techniques that let you walk through virtual spaces larger than the room you’re standing in.

UnityC#Locomotion

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Co-op VR puzzle game logo with green and white ovals and a grey square

Co-op VR game

Beyond Boundaries

A two-player cooperative VR puzzle game built around portals, gestures and weighted objects.

UnityMultiplayerHand tracking

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Pixelated radio icon with the text: A time-traveling radio

Hardware

Tactile Time Machine

A vintage radio rebuilt into a time-travelling multimedia device, with a rotary year dial and dimmable lights.

ArduinoRaspberry PiElectronics

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Infrastructure for an exhibition

Exhibition infrastructure

Ankommen?

Infrastructure, backend and iOS integration for an award-winning exhibition on migration, faith and identity.

iOSAngularTypeScript

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Speech bubble icon with a green status dot and text: A lunch bot for Mattermost

Chat bot

Mensa Bot

A lunch bot for the HCI Group’s Mattermost, with personal food-keyword alerts.

n8nMattermostJavaScript

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About

Computer scientist, HCI researcher, full-stack developer.

I’m Simon, an M.Sc. student in Computer & Information Science at the University of Konstanz, focused on Human-Computer Interaction. Professionally I’m a Full-Stack Developer at FastRocket GmbH, building tailored PHP applications on WordPress and Shopware with an eye for clean architecture and human-centered design.

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Now

Thesis
Hybrid pointing devices for cross-reality interaction
Work
Full-Stack Developer at FastRocket GmbH

Toolbox

UnityC#TypeScriptAngularPHPWordPressShopwarePythonSpring BootESP-IDFCI/CD

A cyclist in a purple jersey riding along a paved road surrounded by lush greenery, followed by another cyclist
Bodensee-Radmarathon, September 2026.

Off the keyboard

Cycling, mostly.

When I’m not building things, I’m usually on a bike: the Bodensee-Radmarathon in September, and before that a week-long tour across Estonia at the end of the Erasmus semester, written up day by day. Ferries, lighthouses, one mosquito ambush.

Erasmus Tartu, the whole semester

Latest from the road

All bike tour posts

  • Large white I heart Pärnu sign in a grassy park next to a river with docked boats

    Bike Tour Day 7

    The final stretch into Pärnu brought missed beachside lunch spots, a celebratory ocean swim, and an incredible reminder…

  • A blue and white ferry ship approaching a closed loading ramp at a harbor

    Bike Tour Day 6

    Between an intense mosquito ambush in a café hammock and a sudden storm sprint, I looked at the…

  • Glowing blue tent at a campsite at twilight, silhouetted by trees under a cloudy sky

    Bike Tour Day 5

    A day of local delicacies and matching grease tattoos led to a gamble with the local bus transit…

Elsewhere

Most of what I make ends up on GitHub.

The rest is on LinkedIn, and the prototype videos are on YouTube. If you have a question about a project, there is a contact form.