Job Title: Lead Software Engineer – Core Cryptography (C/C++ And z/OS) Location: Richmond Hill, ON (Onsite) Contract: 6 months (Possible extension)

About the Role We are seeking a Lead Cryptography Software Engineer to own and evolve the core cryptographic engine of an enterprise security platform used by global financial institutions. This is a hands‑on leadership role focused on C/C++ systems programming, applied cryptography, and IBM z/OS, with responsibility for design, implementation, and technical direction.

Key Responsibilities

• Lead design and development of a cross‑platform C/C++ cryptographic library (Linux, Windows, AIX, Solaris, z/OS).
• Implement and review security‑critical cryptographic functionality, including TLS, key management, and FIPS 140 readiness.
• Own build, CI/CD, testing, and release pipelines (CMake, GitLab CI, Jenkins).
• Ensure API/ABI stability, code quality, and secure development practices.
• Act as technical escalation point for customer cryptography and HSM issues.
• Drive IBM z/OS development, working with xLC/C++, JCL, SMP/E, RACF/SAF, and system programmers.
• Mentor engineers and provide hands‑on technical leadership.

Required Qualifications

• Expert‑level C/C++ systems programming experience.
• Strong background in applied cryptography (TLS, symmetric/asymmetric crypto, key management).
• Experience with cross‑platform libraries, native interop, and build systems.
• Hands‑on IBM z/OS development experience.
• Proven technical leadership in security‑critical environments.

Preferred

• HSM / PKCS#11 integrations (Thales, nCipher, Atalla).
• Java or C#/.NET native interop.
• Post‑quantum cryptography exposure.
• Payments or financial security standards experience.