Director, Quantitative Trading & AI Platform

Citi; Greater London; Hybrid; GBP 120,000 - 190,000; Full time

Benefits offered by this job

Hybrid work model

Medical coverage

Mental health resources

Parental and family support

Competitive retirement planning

Training & mentorship

Job summary

Citi seeks a Senior Quantitative Analyst to develop and scale an AI-enhanced cash equity execution platform in London. You will research EMEA market microstructure, backtest strategies, and deliver quantitative insights to improve execution quality.

Collaboration with Sales Trading, advisory, and tech teams is essential. The role requires advanced degrees (MS/PhD) in a quantitative field, and strong proficiency in Java, Python, Rust, and kdb+/Q.

Qualifications

• Extensive background in quantitative modeling or analytics, ideally in finance, focusing on algorithmic trading systems.
• Proficiency in Java and Python; strong software design and development fundamentals.
• Experience applying probability, statistics, and mathematical finance to market data and equations.
• Proven track record using AI to design high‑performance trading applications.
• Master's or PhD in a quantitative field or equivalent practical experience.
• Strong written and verbal communication to explain complex concepts.

Responsibilities

• Build and scale our cash equity electronic execution platform using Java, Rust, and AI technologies.
• Conduct EMEA equity market microstructure research and apply advanced statistics to extract insights.
• Backtest and prototype quantitative strategies using Python and kdb+ for validation.
• Monitor client trading performance and deliver quantitative insights to improve execution quality.
• Collaborate with Sales Trading, Execution Advisory Services, and technology teams to align capabilities.

Skills

Quantitative modeling

Algorithmic trading

Java

Python

Probability theory

Statistics

Mathematical finance

AI technologies

Communication

Research & analysis

Education

Master's or PhD in quantitative field

Tools

Java

Python

Rust

kdb+/Q

Job description

Citi seeks a Senior Quantitative Analyst to develop and scale an AI-enhanced cash equity execution platform in London. You will research EMEA market microstructure, backtest strategies, and deliver quantitative insights to improve execution quality.

Collaboration with Sales Trading, advisory, and tech teams is essential. The role requires advanced degrees (MS/PhD) in a quantitative field, and strong proficiency in Java, Python, Rust, and kdb+/Q.