Open source developer and consultant in Berlin. I build tools for reverse engineering, scooter hacking, and community infrastructure. Polyglot across Go, Rust, Python, Ruby, TypeScript, and Flutter. For hire: development, architecture, consulting, design. Once proposed a goose to Unicode. 🪿

Open-source firmware and services for the unu Scooter Pro. Go microservices, Flutter dashboard, Yocto Linux, CAN bus, NFC, the whole stack. I contribute across frontend, services, embedded, docs, and tooling.

Community-driven documentation and tooling for the unu Scooter Pro. I contribute to the technical reference and the unustasis mobile app.

Multi-instance Ghidra plugin with REST API and MCP bridge for AI-assisted reverse engineering, binary analysis, and decompilation. Includes a ghydra CLI tool to interact with Ghidra from the command line.

Desktop app, CLI client, and bot framework for Chatto:

• chatto-tauri: Native desktop app (Rust)
• chatto-cli: Command-line client (Go)
• chatto-bot: Bot framework (Python)

Part of c3lingo, providing live interpretation at Chaos Communication Congress and other events. I build and contribute to the tools that keep large volunteer-run events running:

• rescheduled: Shift scheduling for c3lingo
• hub: Central API for CCC volunteer coordination
• Engelsystem: Shift planning for chaos events
• pretalx: Conference scheduling and CfP management

• Quellenportal: Search across 600k+ German Federal Archives holdings
• MeinBezirk.app (coming soon)

• SrvSurvey: Planetary exploration companion
• min-ed-launcher: Minimal launcher

• wikitool: Query Wikipedia from the terminal
• wikitool-skill: Claude Code skill for fetching and searching Wikipedia with wikitool
• specter: CLI for the Ghost Admin API

• dayone-to-obsidian: Convert Day One journal exports to Obsidian-compatible Markdown (Ruby)
• dayone-to-obsidian-js: Browser-based Day One to Obsidian converter

• moco-ruby: Ruby client for the MOCO API
• moco-synthesizer: Generate synthetic data for MOCO test instances
• epp-ruby: Ruby implementation of EPP for domain registration and management
• epp_client-autodns: AutoDNS registry extension for epp-ruby
• epp_client-isnic: ISNIC registry extension for epp-ruby
• autodns-domainrobot_api-gem: Ruby client for the InternetX AutoDNS Domain Robot REST API

• Beans: Dependency handling and CLI improvements

• Kamal: Proxy configuration value equality

• mail-parser: HTML-to-text parsing fix

• flutter_i18n: Locale fallback improvements

• FlutterToast: Logging fixes

• Tunu firmware and configs: Temperature calibration and ECU telemetry

• Cult of the Lamb save editor: MessagePack save support

• radio-gaga: Scooter telemetry, Telegram notifications, and MQTT fixes

• stalwart: Mail server fixes

• weg-li: Bike lane enforcement platform

• transcribee: Transcription tool

• bundler: Ruby dependency management

• crystal: Parallel AI coding sessions in git worktrees

I run Starsong Consulting. Strategic consulting for digital transformation and operational excellence.

• github@teal.is
• @teal.is on Bluesky
• LinkedIn