Senior Staff/Staff Cryptography Engineer

As a Senior Staff or Staff Cryptography Engineer at OKX, you design and implement advanced cryptographic systems for a leading crypto exchange and developer of OKX Wallet. You work on post-quantum cryptography, multi-party computation, and Web3 security products, shaping the cryptographic foundation that protects millions of users and institutions accessing crypto markets globally.

What you'll do

• Design, assess migration paths for, and implement post-quantum cryptography (PQC) algorithms within existing signature and key management systems; track the latest developments in cutting-edge PQC standards such as lattice-based cryptography
• Design and develop the underlying cryptography library for MPC wallet and Web3 security products
• Research Web3-ecosystem cryptography technologies and produce technology selection reports and related technical documentation
• Conduct security audits of wallet-layer signature code and cryptographic protocol implementations
• Participate in defining the team's cryptography technical standards and enforce security red lines for cryptography-related code

What you bring

• A Master's degree or above in Cryptography, Mathematics, Computer Science, Cybersecurity, or a related field
• A solid theoretical foundation in cryptography, including public-key cryptosystems, symmetric and asymmetric cryptography principles, lattice theory fundamentals, security protocol design, and blockchain cryptography applications
• In-depth research experience in post-quantum cryptography; familiarity with lattice-based cryptography and hash-based signatures; knowledge of NIST PQC standard algorithms such as Kyber, Dilithium, and SPHINCS+
• In-depth research experience in secure multi-party computation (MPC); familiarity with threshold signature and secret sharing protocol principles and engineering implementation
• Some research background in zero-knowledge proofs (e.g. zk-SNARK or zk-STARK), homomorphic encryption, or related cryptographic theory
• Proficiency in at least one of: C/C++, Rust, Go, or Java

Nice to have

• Published papers at international cryptography conferences
• Fluent English in listening, speaking, reading, and writing

What we offer

• Competitive total compensation package
• Learning and development programs and education subsidy for your growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for you and your dependents

About OKX

OKX is a leading crypto exchange and developer of OKX Wallet, giving millions access to crypto trading and decentralized applications, while serving hundreds of large institutions seeking access to crypto markets. OKX is part of OKG, a group that brings the value of blockchain to users worldwide through leading products including OKX, OKX Wallet, and OKLink.