Staff/Principal Level Cryptography Engineer - Messaging

Our client is seeking an experienced Applied Cryptographer or Cryptographic Engineer to focus on building their decentralized messaging platform backed by a16z.

Preferred Experience:

• 3+ years of experience blending product engineering with security, with a substantial focus on E2EE (End-to-End Encryption), cryptography, and protocols such as Double Ratchet, X3DH, or MLS (Message Layer Security).
• Demonstrates proficiency in the Rust programming language and has a comprehensive understanding of peer-to-peer (P2P) protocols.
• Has experience with the design and implementation of decentralized systems, including blockchain technologies, smart contracts, and zero-knowledge technologies.
• Is familiar with adversarial system thinking, with a track record of developing secure products and identifying potential system threats.
• Nice to have
  • Has experience in conducting penetration tests and diagnosing system vulnerabilities.

Responsibilities:

• Develop and implement advanced cryptographic and E2EE solutions for innovative product offerings.
• Use adversarial system thinking to identify potential threats and establish robust defensive measures.
• Apply knowledge of P2P protocols and decentralization to bolster product security and operational efficiency.
• Incorporate blockchain, smart contract, and zero-knowledge technologies into product design to enhance security and functionality.
• Carry out penetration testing and vulnerability assessments to identify and rectify system weaknesses.
• Communicate effectively with stakeholders, conveying complex security concepts in a clear and concise manner.
• Collaborate with teams organization-wide to embed security best practices into all product development and operational activities.
• Keep abreast of industry developments, evolving threats, and best practices in cryptography and blockchain, and integrate these insights into the product development lifecycle.

- Remote, North America or Europe Time Zone