PKI Engineer - C# Expert

Citibank (Switzerland) AG; Chennai District; Hybrid; INR 1,200,000 - 2,000,000; Full time

Job summary

Citibank (Switzerland) AG in Chennai is seeking a PKI Engineer with strong C# and Python skills to develop cryptographic architectures and automation for enterprise systems. You will work on certificate automation for microservices, servers, and various Citi infrastructure, ensuring alignment with security standards.

The role requires hands-on cryptography, PKI concepts, and experience with Bouncy Castle. Candidates should be proficient in Windows and Linux, with a secure development mindset and

Qualifications

• Bachelor’s degree/University degree or equivalent experience.
• Master’s degree preferred.
• Understanding of Windows and Linux.
• Understanding of cryptographic protocols.
• Programming in C# and Python.
• Knowledge of Crypto Libraries (Bouncy Castle).
• Security engineering principles for enterprise systems.
• Symmetric and asymmetric encryption.

Responsibilities

• Develop enterprise-scale PKI and cryptography solutions with automation.
• Integrate PKI and certificate management with Citi platforms.
• Perform product evaluation, testing and certification of PKI/Crypto technologies.
• Provide occasional 4th level support and document processes.
• Follow the Technology Development Life Cycle for security tools.

Skills

C#

Python

Cryptography

Security engineering

Education

Bachelor’s degree or equivalent

Master’s degree preferred

Tools

Bouncy Castle

PKI tooling

Job description

## PKI Engineer - C# ExpertApply: Hybrid: Chennai Tamil Nadu India: Full time: Posted Today: End Date: October 16, 2026 (6 days left to apply): 26997340The purpose of this job is to develop and engineer Cryptography and PKI Systems, support middleware integrations using C#.net alongside existing team members fulfilling corporate requirements, policies and standards. 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.Cryptographic engineering developer with hands on experience in C#.net. The engineer will work on emerging technology and exciting area of next generation security ecosystem.The job will also involve working with advanced mathematical algorithms and is generally known to provide good job satisfaction for the right candidate meeting our Citi and team culture fitness requirements.The engineer will focus on certificate automation projects in Citi, including certificate automation for microservices, desktops, servers, Windows, Unix hosts, firewalls, appliances and other citi infrastructure and platforms. **Responsibilities:*** The candidate's primary responsibility will be to develop solutions at the enterprise level, which will include working on cryptographic architectures with main focus on automation in the PKI & cryptography engineering space.* The candidate must have a basic understanding of cryptographic concepts and its pillars. Knowledge of principles related to PKI, private keys, encryption methods, CRL, and advanced key usages is good to have.* They must be familiar with information security concepts and products.* They must have strong development background in C# and Python.* A sound knowledge of secure development technologies, object oriented programming and shift left is required.* 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:*** Understanding of Microsoft Windows operating systems* Understanding of Linux* Understanding of cryptographic protocols* Programming Experience in 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 experience* Master’s degree preferred