Charles Guillemet
CTO of Ledger
Charles joined Ledger in 2017 as Chief Security Officer and was promoted to Chief Technology Officer (CTO) in 2019. Before joining Ledger, he spent 10 years in the cryptography & hardware security sector.
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Harald Rauter
Chief Growth Officer 21energy GmbH and Board Member European Bitcoin and Energy Association (EBEA)
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BTC Prague • Twenty one million s.r.o.
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