Infrastructure Senior Engineer, Citi

Citi

Location:
United States, Jersey City

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

176720.00 - 265080.00 USD / Year

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Job Description:

Senior Subject Matter Expert (SME) – Infrastructure role providing leadership and direction for Change-The-Bank (CTB) electronic trading infrastructure initiatives covering all technologies for Compute, Accelerators, Performance Tuning and HPC. The role sits within Citi's Global Markets: High Performance Architectures – Infrastructure (HPAi) group responsible for all electronic trading infrastructure architecture across all markets globally for the firm.

Job Responsibility:

Provide leadership and direction for Change-The-Bank (CTB) electronic trading infrastructure initiatives
Drive innovation and technology adoption in a large multi-faceted and complex environment
Collaborate with ICG-Markets, CTI Enterprise Infrastructure, and CISO Security teams
Ensure best in breed Linux and surrounding technology architecture and engineering in alignment with business requirements
Ingress/plan/execute/manage technical initiatives to make electronic trading systems faster, more adaptable stable and maintainable
Communicate ideas, requirements, and results across disparate teams
Support technical populations (Rates), partnering with leaders to understand their challenges and design and execute solutions
Communicate business and IT requirements to external vendors and internal technical teams

Requirements:

Deep knowledge of operating system fundamentals with 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
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
Fluency in English required

Nice to have:

Ability to efficiently analyze and deconstruct technical problems
Excellent judgment with attention to detail and accuracy
Strategic thinker who can understand and anticipate needs at all levels
You enjoy tinkering with technology in your spare time
Ability to manage time efficiently
Can work independently and as a team player
Passionate about making processes simpler and more effective
Strong ability to build relationships as a trusted partner
Experience coaching more junior technical resources
You are resourceful, have a sense of urgency, and are motivated to make things better
Strong written and verbal communication skills with strong attention to detail
Able to comprehend the major fundamentals of any project to understand how your role fits into the bigger picture
Reliable, courteous, and a flexible team player
Describes detailed problems with brevity and accuracy
Can work autonomously with strong organizational skills
Handles competing priorities in a challenging, fast-paced environment

What we offer:

Medical, dental & vision coverage
401(k)
Life, accident, and disability insurance
Wellness programs
Paid time off packages including vacation, sick leave, and paid holidays
Discretionary and formulaic incentive and retention awards

Additional Information:

Job Posted:
September 10, 2025

Expiration:
November 15, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Infrastructure Senior Engineer