Citadel Securities
Citadel Securities Offices
OnSite Workplace
Employees work from physical offices.
Typical time on-site:
5 days a week
Global Office Locations
London

Close
120 London Wall, London, United Kingdom, EC2Y 5ET
Recently posted jobs
Information Technology • Software • Financial Services • Quantitative Trading
Design, build, and operate high-performance Kdb+/Q platforms for real-time and historical market data, partnering with traders and researchers to deliver scalable time-series analytics, streaming, and trading solutions while driving architecture, automation, and operational excellence.
Information Technology • Software • Financial Services • Quantitative Trading
Leads EMEA People Operations across onboarding, employee changes, mobility, payroll inputs, benefits, records, and offboarding. Oversees regulatory compliance, HR data integrity, audits, reporting, vendor performance, employee queries, and process improvements across multiple European and Middle Eastern locations. Partners with HR, recruitment, compensation, benefits, legal, finance, IT, payroll, and external providers while supporting relocations, remuneration requirements, and HR-related expansion projects.
Information Technology • Software • Financial Services • Quantitative Trading
Lead architecture and engineering of high-performance crypto market feed handlers and exchange connectivity. Build low-latency ingestion, normalization, sequencing, order book construction, and distribution systems; drive venue onboarding, data quality, reconciliation, recovery, and replay; improve latency, throughput, resiliency in a 24/7 production environment; partner with trading and research teams; mentor engineers and define operational KPIs.

