PKI Engineer

Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network.

We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities.

Help solve real‑world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. Role Overview The purpose of this job is to develop and engineer Cryptography and PKI Systems alongside existing team members fulfilling corporate requirements, policies and standards. You will take part in defining cryptographic standards, architectures, and governance, develop large‑scale enterprise security solutions using advancements in cryptography and information security, work with advanced algorithms.

You will act as a cryptographic engineering developer, focused on cryptographic protocols, including but not limited to post‑quantum cryptography, PKI solutions, and strategic vendor interaction. The engineer will work on next‑generation crypto ecosystem. The job will also involve working with advanced mathematical algorithms in the PKI.

You will participate in certificate management development focusing on certificate automation projects in Citi, including certificate automation for microservices, desktops, servers, Windows, Unix hosts, firewalls, appliances. Responsibilities Research cryptographic protocols, develop crypto solutions at the enterprise level, including working on PKI architectures with main focus on certificate management automation. Have experience with PKI, understanding of basic cryptography and principles related to PKI, private keys, encryption methods, CRL, and advanced key usages.

Be familiar with information security concepts and products. Have strong development background. Possess sound knowledge of encryption algorithms and peripheral technologies.

Work with all disciplines, engineers, and operational product owners to integrate PKI and certificate management related technologies with Citi platforms to protect and manage the cryptography of mission critical systems. Perform product evaluation, testing and certification of PKI and Crypto technologies. Ensure that all security products meet or exceed Citi internal and regulatory requirements.

Provide occasional 4th level support for the product toolset. Produce documentation of processes and procedures for the usage of the product. Follow the Technology Development Life Cycle in the development of all security tools.

Qualifications Senior level experience in cryptography Experience with commercial CA products and/or certificate management systems is a plus. Working with Trust Providers is a plus. Understanding of Microsoft Windows operating systems Understanding of Linux Understanding of cryptographic protocols Programming experience in Java or C Programming in Python Knowledge of Crypto Libraries (Bouncy Castle) Sound security engineering principles as background to understanding the inner workings of the systems and controls that form an enterprise security ecosystem Symmetric Key Encryption Asymmetric Encryption Education Bachelor’s degree/University degree or equivalent What We’ll Provide You By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretionary annual performance‑related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resources Visit our Global Benefits page to learn more.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

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