Senior Software Engineer, Cryptography - Mozilla Corporation

Key Responsibilities

• Design, implement, and maintain cryptographic algorithms and protocols that protect user data in the browser.
• Collaborate with product, security, and privacy teams to integrate cryptographic solutions into new and existing features.
• Conduct threat modeling, security reviews, and performance benchmarking of cryptographic code.
• Contribute to open‑source cryptography libraries, ensuring code quality, test coverage, and documentation.
• Mentor junior engineers and promote best practices for secure software development.

Requirements

• 5+ years of professional experience in cryptography or security engineering.
• Strong proficiency in Rust and C++ (or similar systems languages) with solid Python scripting skills.
• Deep understanding of modern cryptographic primitives, protocols, and standards (e.g., TLS, AEAD, elliptic curves).
• Experience developing on Linux and familiarity with build systems, CI/CD pipelines, and performance profiling.
• Proven ability to work cross‑functionally, communicate complex security concepts, and contribute to open‑source projects.