Isaac Brauer

Builds AI-driven apps, SaaS, websites and PCB hardware.

Isaac Brauer is based in Stuttgart, Germany. He builds AI-driven apps, SaaS and websites, and he also designs hardware, including PCBs.

About

Isaac Brauer is a builder based in Stuttgart, Germany. He builds AI-driven apps, SaaS products, websites and PCB hardware, and works solo with AI coding agents. His projects include Tiler, an open source window manager for macOS, and Digi Works, a service for small craft businesses in the Stuttgart region that offers an AI phone assistant and a first website. In 2025 he took part in the Jugend forscht regional competition with an air-quality sensor he built. Contact: [email protected].

Projects

Tiler

A Moom-style window manager for macOS, controlled from the menu bar or a hotkey.

  • Moves or resizes the front window, or arranges every window on a screen, using layout presets.
  • Opens from the menu bar, with the hotkey ⌃⌥T, or (beta) by hovering a window's green button.
  • Covered by 86 unit tests and a 238-scenario window-arrangement harness, built and tested with automated live test tools.
  • Open source, MIT licence.
Stack
Swift 6, AppKit, Accessibility API, macOS 14+
Status
Open source on GitHub
View on GitHub

Digi Works

A service for small craft businesses (Handwerksbetriebe) in the Stuttgart region.

  • An AI phone assistant that answers calls and takes enquiries.
  • A first website, plus help with visibility on Google and in AI answers.
  • Website live since August 2026. Static, on Cloudflare Pages, with llms.txt and structured data.

Same domain: chess.digi-works.org, a free chess site, live since October 2026.

Stack
Static site, Cloudflare Pages, llms.txt, structured data
Status
Website live since August 2026
Visit digi-works.org

FSH air-quality sensor

A custom air-quality measuring device, designed in KiCad.

  • Combines a Plantower laser particle sensor, an MQ135 gas sensor and a temperature and humidity sensor on a Seeed XIAO ESP32-C3.
  • Bluetooth dashboard on the phone, plus an RGB status LED.
  • The second board revision runs on solar charging instead of a 9 V battery.
  • Through-hole and hand-soldered.
Stack
KiCad, ESP32-C3, Bluetooth, Plantower sensor, MQ135, PCB
Status
Built at the Jugendforschungszentrum Energie und Umwelt and presented at Jugend forscht, Mittlerer Neckar regional competition, February 2025, Sindelfingen. Next step is calibration against a reference.
Press
Stuttgarter Zeitung, 21 February 2025.

Oakhold

A personal AI CFO: a chat-first, forecast-led assistant for personal money.

  • Chat-first and forecast-led.
  • The pitch is the absence of dread about money, not control over it.
  • Read-only bank linking through Plaid.
Stack
Expo, React Native, Express, TypeScript, Supabase (Postgres), Plaid, LLM layer
Status
In development, not yet released.
Visit oakhold.ai

Experience

Awards

Languages

Contact

Questions, feedback or a project to talk about? Write to [email protected].