I'm Daniel, a software engineer with 20+ years of experience. I do stuff with computers – these days mostly by teaching AI agents to do stuff with computers.
Since 2019 I've been working at DB Systel, the IT branch of Deutsche Bahn, helping to make public transportation better and cheaper to run. Chuu chuu! 🚆 🌳 🌞 My day job revolves around AWS, CDK, Ansible and infrastructure automation.
My current focus is AI tooling: I build SDKs, CLIs, MCP servers and skills that let agents work with real-world systems – from cloud infrastructure to my kids' school and learning apps. If a service doesn't have an API, I'll probably write one.
I'm born and living in Frankfurt 🇩🇪, with 16 years in Berlin 🇩🇪 and 3 years in Udon Thani 🇹🇭 in between. Married, 3 children.
My favorite language is Go, though I've learned to love TypeScript. Also worked with Rust, Python, Ruby, Swift, C++, C#, PHP and a bunch more.
- duolingo: Duolingo API client library and MCP server
- switch-parental-controls: CLI and MCP server for Nintendo Switch Parental Controls
- anton: SDK, CLI, MCP server and agent skill for the anton.app learning platform
- lanis-mcp: MCP server for Schulportal Hessen (Lanis)
- dsbmobile: SDK, CLI and MCP server for DSBmobile – German school substitution plans
- avanti: A stateful package manager for arbitrary text files – compose
CLAUDE.md/AGENTS.mdand shared configs from any source, with diff, history and rollback - reminders-cli: CLI for Apple Reminders with JSON output, batch edits and repeating reminders – made for agents
- IAM Floyd: AWS IAM policy statement generator with a fluent interface
- cfn-teleport: Move CloudFormation resources across and within stacks
- cdk-ec2-key-pair: AWS CDK construct for managing EC2 key pairs
Previously: almost 9 years at Groupon.
More about me and my career on my landing page.