Felix Schoberwalter

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I ship SaaS products used by 3,000+ people and open-source tools built on AI and browser automation. From idea to production — solo.

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>About
Felix Schoberwalter

Hey, I'm Felix — a fullstack developer and AI engineer based in Mannheim, Germany.

I build things that ship and things that scale — from a SaaS platform with 3,000+ users to open-source tooling for AI music generation and browser automation. I work end-to-end: architecture, backend, UI, and ops.

I care about real user value, clean code, and the craft of shipping. When I'm not building, I'm making music or going down AI rabbit holes.

0+Years Coding
0+Users Reached
0+Projects Shipped
>Projects

MultiSub

3K+ users
2024–present

AI-powered subtitle platform

Founder & Solo Developer

SaaS platform that generates and translates subtitles using AI. Built from scratch as a solo founder — handling everything from architecture to billing to user growth. Serving 3,000+ users with reliable, fast transcription powered by OpenAI Whisper.

Next.jsTypeScriptOpenAI WhisperStripePostgreSQL

Grace Piano

2024

Online piano teaching platform

Lead Developer

A platform for online piano lessons with scheduling, payments, and student management. Built with a focus on smooth UX for both teachers and students.

Next.jsTypeScriptStripeSupabase

SunoKit

Open Source
2025

Music generation CLI & library

Open Source Author

Open-source CLI and Node.js library for AI music generation. Supports full feature parity including custom mode, audio references, personas, model selection, and CDN downloads. Headless-capable with persistent session management.

TypeScriptNode.jsPuppeteerBrowser Automation

GeminiKit

Open Source
2025

Gemini image generation automation

Open Source Author

Browser automation library for Google Gemini with persistent login sessions, headless mode, and robust error handling. Features smart cookie management, consent page handling, and programmatic image generation via the Gemini web interface.

TypeScriptNode.jsPuppeteerBrowser Automation

Discord Voice Bot

Open Source
2025

Modular STT → LLM → TTS voice bot

Open Source Author

Modular Discord voice bot with swappable speech-to-text, LLM, and TTS providers. Designed for extensibility — swap any provider without touching core logic. Supports Whisper, OpenAI, and multiple TTS engines out of the box.

TypeScriptdiscord.jsOpenAI WhisperNode.js
>Skills
skills.sh
~ $ ./skills.sh --list
> AI Engineering
OpenAIAnthropicWhisperAI AgentsRAGPrompt EngineeringTTS
> Full-Stack
Next.jsReactTypeScriptNode.jsPythonPostgreSQLSupabasediscord.js
> Browser Automation
PuppeteerPlaywrightHeadless ChromeWeb ScrapingSession Management
> Infrastructure
DockerVercelCI/CDGitLinuxCloudflare
~ $ ./ask-felix.sh(AI-powered — ask me anything about Felix)
Try: "What does Felix work with?" or "Tell me about MultiSub"
$0/300
>Latest Posts
Building an AI-Powered Discord Voice Bot
Dec 15, 20248 min read

How I built a voice bot that listens, transcribes, and responds using Whisper and GPT — all in real-time inside a Discord call.

AIDiscordTypeScript
From Piano Teacher to SaaS: Building Grace Piano
Nov 20, 20246 min read

The story behind Grace Piano — turning a real teaching workflow into a SaaS product with AI-powered lesson planning.

SaaSNext.jsStartup
Building a Life OS with Obsidian and AI
Oct 5, 202410 min read

My system for managing goals, habits, and projects using Obsidian, automated agents, and a custom AI layer.

AIProductivityObsidian
>GitHub
$ gh profile --user schobiDotDev
>Contact

$ send_message --to felix