Senior Software Engineer (Cryptography)

Bitwarden is the trusted identity security leader for millions of users worldwide, empowering enterprises, developers, and individuals to securely manage and share sensitive information anywhere. As a Senior Software Engineer specializing in cryptography, you will lead the design and development of key hierarchies and cryptographic protocols, owning critical encryption systems and tackling complex technical challenges.

Responsibilities:

• Support Bitwarden goals by designing, developing and maintaining key hierarchies and cryptographic protocols that are secure and performant
• Design and enforce secure key management practices across clients and servers to prevent key compromise and protect sensitive cryptographic material
• Help design usable APIs that abstract crypto correctly for other developers
• Build and maintain both internal and external documentation and specifications
• Troubleshoot and resolve complex security vulnerabilities and issues that require deep technical knowledge of our systems

Requirements:

• Strong proficiency and experience in Rust
• Experience designing and implementing secure cryptographic protocols
• Familiarity with OS-level key management APIs and secure storage mechanisms across platforms
• Practical knowledge of secure key management practices, including key generation, storage, rotation, and revocation
• Ability to evaluate cryptographic library security, performance, and misuse resistance
• Collaborative and adaptable mindset
• Openness and authenticity combined with excellent communication skills
• Excitement and enthusiasm for open source and for better internet security
• Excellent problem-solving skills – you might not know all the answers, but you know how to find and communicate the solution
• Experience with TypeScript and C# are a plus