About the author

Federico De Faveri

I’m a software engineer. I started BlockChain Lion in 2017 to understand blockchains properly, past the headlines, by explaining them in plain language. By 2019 the explanations had turned into a lab notebook: I was signing raw transactions by hand, running my own Ethereum node and shipping a small notary dApp, then writing down what broke.

The blog went quiet after that while I built things for clients. In 2026 I moved it off WordPress and started reviewing the old posts with a security engineer’s eyes. Corrections are marked in each post, and the mistakes, including a real bug in my own contract, are becoming new posts.

What I do now

I run De Faveri Consulting, a technology consultancy in Miami. The work this blog is closest to:

• Smart contract audits: Solidity reviewed by hand, ranked findings and a re-check after you fix them.
• Security audits of websites, apps, cloud and email.
• MVP to production: turning a prototype into software you can run a business on.
• Fractional CTO work for founders carrying every technical decision alone.

Get in touch

The quickest way is a free 30-minute call, or the contact page at De Faveri Consulting. Code from these posts is on GitHub.

How this blog works

Posts from 2017 to 2019 are kept as written, with notes where facts have changed or I got something wrong. Consulting links point to my own company; see thedisclosure.