Principal Cryptographer

Description Context Our client s a cybersecurity company that builds custody SaaS protocol for web3 apps. Think of it as a developer tool that provides secure cloud for crypto. Our mission is to bring serenity to DeFi by eliminating new blockchain risks and making crypto transactions easier, faster, more affordable, and compliant with existing regulations. From fintechs to large banks to e-commerce sites, our client gives financial institutions and businesses the freedom to own and transfer crypto on a battle-designed security infrastructure. Their API is designed to offer best-in-class developer experience, allowing any platform to deploy custodial wallets in a matter of days, with streamlined feature delivery and frequent security upgrades. Founded in 2020 in Paris, a startup incubated at Station F (awarded Future 40), accelerated by Techstars and recognized DeepTech by the French Ministry of Economy. The company is fully remote with offices in Paris, Amsterdam, New York, London, Stockholm, Sofia, and other cities. Job Description You will contribute to one of the most ambitious technology projects in crypto today: building a trustless custody infrastructure for the trillion-dollar digital asset industry. You will join an amazing team of leaders (CTO, Chief Scientist, CISO) and experts (Software Engineers, R&D Engineers, Security Engineers) in a highly challenging and collaborative environment. We are looking for a Principal Cryptographer to explore different research tracks such as algorithms, asymmetric cryptography, threshold cryptography, PQC, crypto-agility, off-chain transfers, signatures and other types of tools to encrypt sensitive data and protect it from hackers, misuse, and cybercrime. As a Principal Cryptographer, you will be laser-focused on finding ways to protect blockchain keys from being intercepted, decrypted, copied, altered, or deleted by unauthorized actors. You will need a deep understanding of cryptography, namely MPC, ZKP, and all related algorithms. You will also develop and apply various mathematical models to help find and thwart potential systems threats. Mission Your primary goal will be to research state-of-the-art cryptography to enhance our products with security systems, primitives, techniques, and algorithms, and make them safer, faster, more efficient, and more affordable. Example of a primary metric would be Publication Per Year. Your day-to-day projects will involve: Acting as a powerhouse of ideas on all cryptographic and research issues. Identifying weaknesses and designing robust security systems to negate new risks. Testing in-practice cryptographic theorems according to product security requirements. Identifying and securing weaknesses in new and existing cryptographic systems. Working closely with Chief Scientist to implement the R&D roadmap. Working closely with R&D engineers to iterate and specify the implementation of new, patent-pending crypto-primitives and protocols. …