We are seeking a Lead z/OS Developer to join a world-class team owning a core cryptographic engine. In this high-impact, hands-on role, you will drive the development, packaging, and security of a cross-platform C/C++ library ported to IBM z/OS. You will write substantial code, lead feature designs, and engage directly with clients' systems programmers on security integrations. If you thrive in deep systems programming and engineering-first cultures, this is your next career step.
Advantages
Rare Tech Breadth: Own critical systems across Linux, Windows, z/OS, and HPE NonStop.
Massive Impact: Protect global banking and healthcare data with advanced cryptography.
True Engineering Culture: Work in a highly technical, senior-skewed, and collaborative team.
Responsibilities
Lead end-to-end design and write production-ready, portable C/C++ and HLASM code.
Own the IBM z/OS port, build strategy (JCL, SMP/E), and modern VS Code toolchains.
Resolve complex customer escalations regarding mainframe integrations, SAF/RACF/ACF2, and TLS.
Mentor junior engineers.
Qualifications
Experience: 10+ years of z/OS development experience.
Core Skills: Expert HLASM assembly, JCL, and z/Architecture (31/64-bit).
Languages: Strong portable C/C++ systems programming.
Plusses: Background in cryptography, HSM integration (PKCS#11), Java SDKs, or HPE NonStop.
Summary
Ready to elevate your mainframe career? Apply today to join our elite engineering team. Please note that while we review all applications, only qualified candidates will be contacted by a recruiter.
Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.
Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.
Senior Mainframe Software Engineer - z/OS and HLASM • Richmond Hill, Ontario, CA
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