Senior Protocol Stack Engineer (Cryptography & Rust)

Threema in Pfäffikon SZ is looking for a Protocol Stack Engineer (80–100%). You will design, implement, and maintain cryptographic protocols that carry every Threema message, including Ibex, ensuring forward secrecy and backward compatibility across platforms.You will work with external researchers and auditors, address findings, and ship fixes. You will mentor engineers, set standards for secure development, and collaborate across Android, iOS, desktop, and web clients. #J-18808-Ljbffr