Bootstrapped <https://www.coinfabrik.com> in 2014 and https://www.nektra.com in 2003.

- CoinFabrik: Web3, R&D in decentralization, and security audits. Blockchain (Bitcoin, Ethereum, Solana, Algorand, etc) and language agnostic (Solidity, Rust, etc)

- Nektra: security, application virtualization, reverse engineering, Windows system internals

- BitVMX <https://bitvmx.org/>: BitVMX framework provides the foundations to run any CPU on Bitcoin, with a focus to run a fully-compliant RISC-V processor programmable using a standard compilation toolchain.

Blogging at https://blog.coinfabrik.com @coinfabrik, https://blog.nektra.com @nektra, and https://blog.databigbang.com @databigbang