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Job Overview
Are you a highly motivated Quantitative Analyst looking for a front-office role where your work directly shapes trading decisions, optimises execution, and drives P&L impact? Citi's Cash Equities Central Risk team is seeking an experienced quant to design and enhance systematic trading components that sit at the core of our execution and internalization strategy. This is a unique opportunity to apply your quantitative expertise, technical skills, and market intuition in a fast-paced, high-impact environment.

Team & Role Overview
The Central Risk team plays a pivotal role in optimising execution quality, internalisation, and risk management across Citi's global Equities franchise. In this role, you will research, design, implement, and maintain systematic trading components, including:

• The Systematic Internalizer (SI)
• Portfolio optimiser and hedger
• Analytics, estimators, and trading signals

You will work closely with traders, risk managers, and technology partners, leveraging advanced analytics and production-quality code to influence trading behaviour and improve commercial outcomes.

What You'll Do

• Research, design, implement, and maintain systematic trading components such as the SI, portfolio optimiser/hedger, analytics modules, estimators, and predictive signals.
• Build robust analytics and reporting tools to identify internalization, pricing, and execution opportunities that drive P&L growth and cost efficiency.
• Partner closely with traders, risk managers, and technology teams to refine models, productionize code, and influence execution strategy in real time.
• Work with control partners (Legal, Compliance, Market/Credit Risk, Audit, and Finance) to ensure a strong governance and control framework.
• Promote a culture of responsible finance, good governance, effective supervision, and sound expense discipline.
• Exercise sound risk judgement in business decisions, safeguarding the firm's reputation and ensuring compliance with all applicable laws, policies, and supervisory requirements.
• Adhere to Citi's Code of Conduct and the Plan of Supervision for Global Markets and Securities Services, while maintaining all required registrations and licenses.

What We'll Need From You

• Master's or PhD in a quantitative, scientific, or technical discipline - such as Statistics, Mathematics, Engineering, Computer Science, or related fields.
• Deep expertise in statistical methods and inference, including regression, optimization, and time series analysis.
• Advanced programming capability in at least one of: KDB+/q, Java, C++, or Python, with demonstrated experience delivering production-quality systems.
• Strong experience with data processing and analytics libraries (e.g., NumPy, Pandas) and comfort working with large-scale datasets.
• Familiarity with software engineering best practices, including testing frameworks, continuous integration, and version control (e.g., Git).
• Experience in a similar front-office quant role within Central Risk, Execution, or broader Equities is strongly preferred.
• Ability to communicate complex concepts clearly and collaborate effectively with both technical and non-technical stakeholders.
• Strong analytical mindset, meticulous attention to detail, and the ability to solve complex quantitative problems under pressure.
• Commercial awareness and the diplomacy needed to influence and persuade stakeholders.

Preferred Skills

• Proficiency in KDB+/q
• Knowledge of equity market microstructure, liquidity modelling, or trade execution algorithms
• Understanding of quantitative risk management and portfolio theory
• Experience with execution and central risk platforms and their integration with trading systems
• Familiarity with feature engineering or machine learning techniques applied to financial markets

By joining Citi London, 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

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 energised to join us, motivated to stay, and empowered to thrive.

If you are actively working with clients, have a passion for relationships and want to be part of a successful global franchise - then apply today.

This job description provides a high-level overview of the role. Additional responsibilities may be assigned as required.
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Job Family Group:
Institutional Trading ------------------------------------------------------
Job Family:
Quantitative Analysis ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
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