Hey, I’m Stefan 👋

Right now I’m building a new live shopping app. Will reveal more in the next few weeks.

In 2025 and early 2026 I worked a lot on voice companions and voice infra. Check out some of that work here:

• orpheus-tts-api - Orpheus 3B TTS API
• voxtral-tts-api – Voxtral STT API
• voxcpm-1.5-tts-api - VoxCPM 1.5 TTS API
• text-inference - text inference server with the ability to switch between TensorRT and vLLM and run a lot of different models
• screenshot-analysis-pipeline - analyse phone/desktop screenshots; used to pass screenshot context to a companion

Past Projects: RAI

A few years back I worked on RAI, a floating-peg stablecoin backed by ETH. RAI uses a PI controller to set its own funding rate (similar to a perp swap’s funding mechanism) and was my attempt at fulfilling the original vision for DAI. We scaled the system to $390M in user funds

Repos from that era:

• geb – main code for RAI
• geb-rrfm-rate-setter – the redemption rate feedback mechanism (controller that sets the funding rate)
• geb-safe-saviours – adapters to deposit assets/wrapped tokens from other protocols into RAI-like systems. The deposited assets get auctioned to save CDPs from liquidation

RAI was basically a super nerdy modified DAI fork.

Side Projects

A bunch of other projects I built:

• gspot – CLI to lint and enforce rules for LLM generated codebases
• yc-cofounder-matching-bot – a Selenium bot I built to automatically hunt for cofounders on YC’s Cofounder Matching platform
• screenshot-intent-classifier – a demo classifier that tries to detect intent from a user to take a screenshot of a phone/desktop screen

TL;DR

• Built RAI (floating-peg ETH-backed stablecoin w/ PI controller funding rate)
• Now building a live shopping app
• In between: I worked a few years as project lead for a decentralized exchange that got to $1B+ in user funds. Decided to leave crypto at the end of 2023 and then started shipping a bunch of fun/weird consumer projects

I love building products that are weird, unhinged and could not exist before LLMs came around. If you’re into that too, reach out and say hi!