Senior Python Engineer, Vice President

Team Overview

XiP is building a next-generation cross-asset calculation system for Citi trading desks and enterprise users in the largest global financial markets and exchanges in New York, London, and other major financial hubs.

Our team owns multiple Java Spring Boot Services that execute, partition, and track quantitative risk graphs/trades in a distributed environment. These graphs can fail due to their complexity and our system must adapt quickly to these failures to provide a seamless experience for clients.

XiP Compute Services are deployed onto OpenShift and Amazon's Elastic Kubernetes Service (EKS). An important initiative in 2025 will be onboarding Google's Kubernetes Engine to further expand our coverage. Our system scales on-demand, and we can run up to tens of thousands of replicas of our services across all asset classes.

Role Overview

We are seeking a Senior Python Engineer to fill the role of 'Applications Development Technology Lead Analyst' on the XiNG large scale distributed calculation platform (XiP).

In this role you will design, build, and maintain the next generation of the XiP platform. You will be working on a Greenfield build of a major new component. The current generation of the product is responsible for 500 million risk & suitability calculations at Citi every day. The next generation of the product is expected to double the customer base and bring in huge new workloads.

As an engineer working on XiP, you will work on a platform which daily; coordinates hundreds of thousands of pods, consumes tens of thousands of compute cores, utilizes hundreds of TB of memory, and distributes hundreds of millions of calculations.

You will work closely with software engineers, DevOps, and our customers to ensure reliable, secure, and scalable operations of the platform.

Responsibilities:

• Take part of the shared responsibility for the long-term strategic direction of XiP: Apply your experience and skills to develop the future versions of the calculation engine.
• Serve as advisor or coach to team members, allocating and overseeing work: Mentor and guide mid-level developers, providing technical advice, code reviews, and career development support.
• Implement the new generation of Citi's Risk Calculation Engine: Participate in the design, development, and implementation of the next version of the XiP Risk Calculation Engine.
• Operationally support the optimization of Risk calculations by examining and providing SME level insight into the distributed execution of extremely large calculations: Monitor and analyze the distributed execution of large-scale risk calculations.
• Plan, coordinate, and execute strategic changes to the engine to reach the next scaling milestone: Develop and manage strategic initiatives aimed at scaling the Risk Calculation Engine.
• Provide specialized customer support to optimize and improve large, distributed calculations: Act as a primary point of contact for clients to address issues and optimize inefficiencies.

Qualifications:

• 5+ years of professional software development experience with Python.
• Solid experience with Python frameworks (e.g. Flask, FastAPI, Pydantic ).
• Experience with python packaging and environment managers (pip, conda, virtual environments)
• Experience with async programming in python (e.g. multiprocessing, subprocess, concurrent.futures)
• Exposure to cloud platforms (e.g., AWS, Azure, GCP) and containerization (e.g., Docker, Kubernetes).
• Experience designing, building, and maintaining large-scale, distributed systems.
• Experience with RESTful API design and implementation.
• Exposure to NoSQL databases (e.g., MongoDB, Cassandra) is a plus.
• Experience with unit testing, integration testing, and test automation frameworks (e.g. Pytest, unittest).
• Experience working in Agile/Scrum development environments.
• Experience with CI/CD pipelines and DevOps practices is a plus.

Education:

Bachelor's or Master's degree in Computer Science, Engineering, or a related field.

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.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi . View Citi's EEO Policy Statement and the Know Your Rights poster.