This Cybersecurity Pro Gets Paid to Hack Ethereum – for the Good of the Network

typical day for David Theodore, a security researcher at the Ethereum Foundation, often starts with him checking to see if there were any crashes on Ethereum, the world’s largest smart-contracts blockchain.
After that, he and his colleagues set about trying to break it themselves.

Theodore, 33, is one of about 10 computer engineers and cybersecurity professionals on the Ethereum Foundation’s security research team, based on a slide presentation from June. They cast themselves as the ultimate maintainers – and guardians – of the fast-growing network, seen by some blockchain experts as the foundation of a future global, digital, and decentralized financial system.