Quant Developer – Trading Analytics – Equity Derivatives Tech in London

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.

Equities Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are re‑engineering our technology estate to achieve world‑leading performance and resiliency, enabling new capabilities in advanced execution, global market connectivity, and modernised post‑trade, clearing and margin processes. Our ambition is to deliver a seamlessly integrated, highly automated platform that drives outstanding client outcomes and accelerates growth across our global franchise.

As part of the team, you’ll collaborate closely with high‑calibre engineers and deeply engaged business and product partners – working together to define and deliver the next generation of Equities technology at Citi.

Team Citi’s Equities Technology organisation is investing in front‑office quantitative development to support the Derivatives Flow, Delta 1, and Exotics desks. We are hiring a hands‑on quantitative developer to build data‑driven, model‑led trading analytics and desk tooling for Sales, Trading, and Quant teams, supporting pricing, signal generation, backtesting, risk analysis, and real‑time market insight.

Role Overview

• Partner with traders, quants, and structurers to deliver production‑grade models, workflows and front‑office applications.
• Build real‑time pricing, risk, and market‑data capabilities for positions, Greeks, P&L, exposures, and execution monitoring.
• Develop data pipelines and services for market and trade data, supporting idea generation, volatility and flow analysis, basket and index insights, and hedging.
• Strengthen the desk technology stack with reusable libraries, APIs, and robust engineering practices.
• Optimise quantitative applications for performance, scalability, and reliability.

Skills required

• Strong experience with the Python data engineering stack, including Polars, Parquet, FastAPI, Jupyter, Airflow, Streamlit, and Ray.
• Experience with high‑performance data stores and query engines such as Trino and KDB.
• Experience with financial products such as equities, options, and futures.
• Demonstrable experience with agentic frameworks for software development and AI‑native solutions using context‑engineering techniques.
• A degree in a quantitative discipline such as Engineering, Applied Mathematics, Physics, or Software Engineering.

This job description provides a high‑level review of the types of work performed. Other job‑related duties may be assigned as required.

Benefits

• 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

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, please contact us for support.

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