hello, i’m daniel,

Alongside my work in public broadcasting, I take on selected freelance work for engineering, media, and product teams across Europe. I use AI tools early, in my own work and at SWR Audio Lab, and I care that a system can be watched, is written down, and still runs after I leave.

• Cloud & DevOps for small teams — Terraform, CI/CD, Kubernetes/k3s, observability (Grafana, Datadog), and cloud cost reviews across Scaleway, GCP, and AWS.
• EU-sovereign hosting & migrations — Pragmatic migrations off US hyperscalers to European providers (Scaleway, Bunny CDN, self-hosted) with GDPR-minded design.
• Audio & broadcast tech — Real-time radio metadata distribution and backends for podcast, radio, and voice-assistant platforms.
• Backend & API development — TypeScript (Node, Bun, Hono, Zod), Go, and Rust APIs with OpenAPI specs, structured logging, and load-tested delivery.
• Websites & CMS — Refactoring and rebuilding conventional websites on modern CMS or statically generated foundations.

See all offers — including responsible AI adoption & integration and maintenance & support — on /services/, or browse recent architecture and engineering case studies on /work/.

• ARD Eventhub — Open-source service that collects what’s on air across ARD radio and sends it to the listener apps (GitHub, docs).
• ARD RAKI — Responsible AI in live radio: regionalised weather and traffic for ARD Popnacht, voiced by an ARD-internal system from editor-written texts, with transparency notices and human override.
• ARD Sounds Voice Assistants — Voice control and smart-speaker playback for ARD Sounds radio and podcast content via Google Assistant, Alexa, and Siri.
• Declarative Infrastructure as Code — Servers and cloud resources described once in code and rebuildable on demand, from a large host down to a machine at home. In daily use on my own services (Tangled).
• feather-ai-proxy & feather-ai-chat — A small self-hosted gateway to several AI providers, with a native app for Mac, iPad, and iPhone.

• Cloud & EU infrastructure: Scaleway, UpCloud, Google Cloud Platform (GCP), AWS, Bunny CDN & Storage, Fastly, dns0.eu, NixOS, Linux.
• Infrastructure as Code & containers: Terraform, Kubernetes / k3s, Docker & Apple container, GitHub Actions, Tangled Spindles, sops + age, k8up / restic, just, and more.
• Backend & APIs: TypeScript (Node.js, Bun, Hono, Zod), Go, Rust, REST, OpenAPI, WebSockets, SSE, MQTT, Redis / Valkey, PostgreSQL, SQLite.
• Observability: Datadog, Grafana, VictoriaMetrics, VictoriaLogs, Prometheus, Loki, Perses, Vector, Better Stack (Better Uptime).
• Media & responsible AI: Live radio metadata pipelines, voice-assistant backends, responsible AI integration (editorial guardrails, transparency labelling, human override, EU-hosted and local models), OpenAI-compatible LLM gateways (feather-ai-proxy), speech-to-text.

• Systems built to last beyond my involvement: Anyone should be able to rebuild the system from the project files, read how it works in plain writing, and run it without me.
• Always touch a running system: Software that is never updated eventually becomes a security and reliability liability. Small, regular updates beat multi-year rescue rewrites.
• European digital sovereignty: Whenever practical, I prefer and recommend European cloud, CDN, and DNS providers with clear GDPR compliance and transparent pricing.
• Quality over quantity: Fewer moving parts, failures you can see, and calm, direct communication — reflected in our public SWR Audio Lab Engineering Principles.