Hagen is a web application for remotely controlling telescopes through the astrophotography software NINA, making deep-sky imaging accessible without owning expensive hardware or the expertise to operate it. Users select an astronomical target and book observation time; Hagen sends imaging sequences to NINA via Tailscale, which executes them overnight and delivers the results. The core challenge is turning a Windows-only, inherently interactive application into a fully autonomous pipeline.

• TypeScript
• Nuxt
• Vue
• Fly.io
• Docker
• AWS
• Terraform
• Playwright
• +4 more

Dialogbank is a SvelteKit application for AI-assisted interviews and editorial publishing. I am helping replace a brittle infrastructure spread across Airtable, Voiceflow, and additional custom services with a single serverless application. By using the built-in workflows of ElevenLabs AI Agents, we significantly reduce maintenance overhead and complexity while improving the phone agent's response time by several seconds, which is crucial for a good user experience.

• TypeScript
• Svelte
• SvelteKit
• Tailwind
• Better Auth
• Drizzle ORM
• Neon DB
• PostgreSQL
• +7 more

DreamMall is a free and open-source social platform for entrepreneurs. I fundamentally reworked the delivery and infrastructure architecture after deployments had previously been performed manually via a remote desktop on the target server, regularly causing downtime. By moving the project to a self-managed Kubernetes setup on Hetzner with Terraform, each developer could test their own branches in production-like environments while keeping operating costs extremely low at under 20 euros per month.

• TypeScript
• Docker
• Vue
• Vike
• Vuetify
• Jest
• Authentik
• Apollo GraphQL
• +5 more

beteon is software for the automotive aftermarket that helps repair shops compare prices across wholesalers. We migrated an Electron desktop application to a cloud-based platform on Google Cloud, Auth0, and Hasura. This significantly improved software quality and increased the number of connected wholesalers from 3 to 240.

• TypeScript
• Docker
• Vue
• Tailwind
• Jest
• Testing-Library
• Auth0
• Apollo GraphQL
• +3 more

100eyes is a platform for audience engagement and crowd-based reporting in journalism. I worked on a Ruby on Rails application that integrates messengers such as WhatsApp, Telegram, Signal, Threema, and email, allowing editorial teams to reach people through channels they already use. Its core differentiator is a direct 1:1 conversation between journalists and their audience, turning a newsroom's own community into a valuable asset for reporting and research.

• Ruby
• TypeScript
• Ruby on Rails
• RSpec
• Stimulus
• Docker
• Ansible
• Digital Ocean
• +2 more

Ocelot.social is a community-built open-source social network that offers communities a privacy-friendly alternative to large platforms. As Technical Lead, I worked on product architecture, GraphQL APIs, production use of Neo4J, and Kubernetes-based operations. The project grew to around 80 code contributors on GitHub; I onboarded newcomers through GitHub, Discord, and online pair programming, mentored them directly, and reviewed most contributions. We used Neo4J in production as the primary database to model the network's social graph directly.

• JavaScript
• Jest
• Vue
• Nuxt
• Storybook
• Cypress
• Apollo GraphQL
• Neo4J
• +3 more

I was fully responsible for a master's course on full stack development with around 40 students, including curriculum, teaching, and grading. Topics included functional programming, advanced Git, test-driven development, and code reviews on GitHub. All lectures are publicly available on YouTube.

• JavaScript
• Vue
• Apollo GraphQL
• Neo4J
• Nuxt
• Vuetify
• Tailwind

My personal portfolio website and a print-optimized resume built from a shared content source. The project combines a bilingual SvelteKit frontend, PDF generation with Typst, and standards-compliant `resume.json` into an accessible, privacy-conscious experience for web and print.

• TypeScript
• Svelte
• SvelteKit
• Tailwind
• Paraglide
• Typst
• Vitest
• Playwright
• +1 more