Tobias

Software engineer since 2000. Building https://polydoc.tech and https://beliq.eu - dev tools for PDF and e-invoicing.

Recent activity

Bilexor — Invoice & Trade Document Management for Importers & Exporters

15 days after launching to zero audience: $0, 1 follower, 0 stars. The full numbers.

Three of my checks reported success while measuring nothing. The green light is the dangerous verdict

Opening VAT Engine to developers — looking for real-world EU VAT edge cases

We stopped sharing agent logins, and the fix was a smaller credential, not a bigger one

15 days after launching to zero audience: $0, 1 follower, 0 stars. The full numbers.

Three of my checks reported success while measuring nothing. The green light is the dangerous verdict

I launched Ceztrix — a simple invoicing tool for freelancers and small businesses

I watch vendor legal pages and email a redline when the meaning changed

I built a public dashboard that shows almost nothing, on purpose

4 founders told me the same thing about launch platforms — so I’m changing what I’m building

On one topic, my sourcing step found 2 usable figures. That's the whole problem.

40 posts to expect 1 sale. Zero sales are not failure at 100 followers.

My AI agent leaked my API key — so I built the guardrail and launched it on Product Hunt today

How I got a solo project indexed on Google, Bing, and Yandex, and set up real-time notifications with IndexNow

When the regulated part of your product legally can't be you

A $350K golf app gets 24% of its traffic from "what is a calcutta." Rank for the question, not the product.

My AI agent leaked my API key — so I built the guardrail and launched it on Product Hunt today

The easiest version of generation history was probably the least useful one

Two-way is not the same as symmetric