Systems Architect, Citi

Citi

Location:
United Kingdom, London

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

Not provided

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Job Description:

The Systems Architect will ensure best-in-breed technology architecture and engineering are in alignment with business requirements, collaborating with diverse teams across the business. The role is broad, requiring expertise in low-latency electronic trading infrastructure and strong technical skills across hardware, software, and networking domains.

Job Responsibility:

Ingress/plan/execute/manage technical initiatives to make electronic trading systems faster, more adaptable stable and maintainable aligned to HPAi standards
Communicate ideas, requirements, and results across disparate teams
Support technical populations (Rates), partnering with leaders to understand their challenges and design and execute solutions to solve them
Communicating business and IT requirements to external vendors and internal technical teams
Understand full-stack electronic trading technologies and engage effectively in a very technical manner with other SMEs, systems architects, the business (at times), Markets-Tech, and enterprise infrastructure organizations (CTI/CISO)

Requirements:

Systems Architecture experience in a Low Latency etrading Trading environment
Deep knowledge of operating system fundamentals – hyper focus on Linux (REL, CoreOS)
Understanding of OSI model and TCP and UDP network protocols
Experience with Python and data libraries
Fluency with the Unix command line and shell scripting
Practical experience with modern Linux systems and systems programming concepts like C, IPC mechanisms, virtual memory, and process life cycle
Strong troubleshooting skills and knowledge of profiling/debugging tools such as gdb, perf, DTrace, SystemTap
Can understand, interpret, and improve application performance via system tuning
Thorough understanding of modern computer architecture - modern x86 AMD and Intel cache hierarchies as an example
Kernel-bypass technology knowledge (such as Solarflare OpenOnload / TCPDirect / ef_vi, RoCE, DPDK)
Prior experience in a similar Site Reliability Engineering (SRE), DevOps, distributed computing, systems engineering/administration
Ability to context switch to work on several projects at once
Knowledge of JIRA, SCRUM, Sprints

What we offer:

27 days annual leave (plus bank holidays)
A discretional 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

Additional Information:

Job Posted:
June 07, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Systems Architect