Abraham Polishchuk is Co-Founder and CTO of Fidesium, the UK smart contract security firm he co-founded with Greg Bock in March 2023. He spent fifteen years leading development teams and computing actuarial risk on large data sets in real time, writing and auditing smart contracts along the way. He writes most of Fidesium's published engineering work, including the Adrena and Sumvin audit case studies and the quarterly platform updates. He is based in London.