Own product · 2026

BlitzBill

Invoicing web app for the German market that issues invoices compliant with §14 UStG. Built solo as a side project through spec-driven agentic development.

• ·Empty repository to launch-ready in about 2 weeks of full-time work, solo, as a side project.
• ·PDF invoice generation, authentication, and a Stripe-based credit system.
• ·End-to-end test suite and a security baseline checked with OWASP ZAP.
• ·Self-hosted on a bare-metal Hetzner server with Dokploy; files in S3 object storage.

Stack

• .NET 10
• Blazor
• PostgreSQL
• Stripe
• S3
• Docker
• Dokploy