Vasyl Kyryliuk

Vasyl Kyryliuk

Building VAT Engine | EU VAT API

About

I’m a software engineer and solo founder building VAT Engine, an EU VAT API for ecommerce and SaaS. The product is in free alpha, with native commerce integrations in development. I share what I learn about money calculations, API design, and building the product, and welcome practical feedback from developers and founders.

Badges

Tastemaker
Tastemaker
Gone streaking 10
Gone streaking 10
Gone streaking
Gone streaking
Gone streaking 5
Gone streaking 5

Maker History

  • VAT Engine
    VAT EngineEU VAT API for ecommerce and SaaS
    Jul 2026
  • 🎉
    Joined Product HuntJuly 17th, 2026

Forums

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3mo ago

Hi Product Hunt — I’m Vasyl, a solo founder building in EU tax tech

Hi everyone! I m Vasyl, a Ukrainian developer currently based in Germany.

My background is mainly in frontend development and e-commerce, but over the past year I ve been expanding into backend engineering, infrastructure, security, and product development while building my first startup as a solo founder.

I m currently working on VAT Engine, an EU VAT calculation and compliance platform for developers and e-commerce teams. I started it after seeing how quickly VAT becomes fragmented across countries, product categories, transaction dates, thresholds, integrations, and reporting workflows.

Building it has pushed me far beyond writing interface code. I now work across Go, Next.js, PostgreSQL, Redis, Docker, APIs, commerce integrations, testing, security, documentation, and the less comfortable founder tasks such as positioning, outreach, and customer discovery.

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3mo ago

The Cash Flow Risk Simulator (CFRS)

I've made this tool called the Cash Flow risk simulator, from the very obvious name you can tell what it does, it basically takes simple financial records whether tangible or intangible, and quantifies the probability of failure. As a business owner the thought of your business failing is always something that looms overhead of founders alike. With my tool you can better understand the risk of failure, how much runway you have, and how to optimize for the lowest chance of failure. The product is still in beta and feedback on my software would be much appreciated. The link for the product will be in my profile if anybody would like to test the early stages of a much bigger vision.

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3mo ago

Building an AI Software Engineering Workspace

For the past few months, I have been working on Navigator.

The objective here is not to create another AI chatbot or another code generator.

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