About Lionel
French
Native or bilingual
English
Fluent
Experience
- FinaxysPhD Student CifreFebruary 2021 - December 2025 (4 years and 10 months)Puteaux, FranceAs part of a CIFRE agreement between Sorbonne University and Finaxys, I conducted applied research on Byzantine Fault Tolerance (BFT) consensus protocols for the financial sector. I designed and developed TenderTEE, an energy-efficient BFT protocol reducing energy consumption by about 50% compared to existing solutions, incorporating a tri-party governance structure adapted to the constraints of financial institutions. This work resulted in three scientific publications, including an article in the journal Theoretical Computer Science. I also ensured the transfer of results to Finaxys' business teams, translating fundamental research issues into recommendations applicable to the fintech sector.
- FinaxysBlockchain EngineerNovember 2019 - February 2021 (1 year and 3 months)Neuilly-sur-Seine, FranceBlockchain R&D, training, overseeing a blockchain project in a team of 4, blockchain acculturation through presentations to various audiences.
- ArchosBlockchain Development EngineerNovember 2018 - November 2019 (1 year)Igny, France• Participation in the architecture and development of a hardware wallet, integration of cryptocurrencies (Bitcoin, Ethereum, Litecoin, Erc20); Development of a secure graphical interface (PIN code, seed recovery...)
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Education
- Master of MathematicsSorbonne University2025Master Mathématiques
- nullSorbonne University