Hi, I’m Lennart!

Software Engineer from Germany.
I’m passionate about working on open source projects & making the web more inclusive through them.

I’m currently working at Mastra.

From MDX to Interactive Sandboxes with remark-sandpack

Learn how remark-sandpack transforms simple code blocks in MDX into interactive Sandpack playgrounds. No manual JSX required for live code examples.

Featured

Writing Performant CSS With vanilla-extract

Learn how to build a Tailwind UI component from scratch by writing performant and type-safe CSS with vanilla-extract. The component will support multiple variants and themes.

My First Unraid Server

My journey from a Synology NAS to building my first Unraid server, detailing my initial hardware and software choices.

Fuzzy Search for Your Git Repository

Use the power of fzf-git to fuzzy search files, branches, tags, commits, and more inside your Git repository from your terminal with beautiful previews.

Open Source

Working in the open, interacting with the community & building projects that are accessible to everyone fill me with joy.

Featured Projects GitHub

mastra 19102

From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

secco 29

Local package testing made easy

thanks-contributors annum astro-loaders lekoarts-stats