Citigroup, Inc

Low Latency Infrastructure Engineering, Equities Trading, Director

Citigroup, Inc • $170K — $300K *
Jersey City, NJ 07305Hybrid
Finance & Insurance
11 - 15 years of experience
4 weeks ago
Job Overview by Ladders

Qualifications

  • 15+ years in low latency infrastructure engineering within financial services
  • Expertise in building exchange colocation environments for trading platforms
  • Deep knowledge of low latency network design and hardware optimization
  • Advanced Linux engineering skills focusing on performance tuning
  • Experience with automation and infrastructure engineering tools such as Python and Ansible
  • Strong background in operational risk and compliance in financial environments

Responsibilities

  • Define and execute the strategic roadmap for low latency trading infrastructure
  • Architect and deliver high performance colocation environments
  • Lead design and implementation of ultra-low latency network infrastructure
  • Drive selection and deployment of cutting-edge low latency technologies
  • Collaborate with vendors and partners to optimize connectivity and performance
  • Establish standards for low latency Linux infrastructure
  • Mentor and develop engineering teams across infrastructure disciplines

Benefits

  • Medical, dental & vision coverage
  • 401(k) plan
  • Life, accident, and disability insurance
  • Wellness programs
  • Paid time off including vacation, sick leave, and holidays
Full Job Description
Role Overview:

Citi Equities Technology is seeking a senior leader for its low-latency infrastructure engineering group. The person in this role will be responsible for design, architecture & delivery of Citi's trading infrastructure across colocation sites and strategic data center assets.

This role requires a combination of deep technical expertise in low latency infrastructure and networking systems, trading microstructure knowledge and strong leadership and execution capabilities. The successful candidate will lead a global engineering team to deliver platform infrastructure in close partnership with the software delivery teams, Citi's enterprise technology group and trading functions.

Key Responsibilities:

  • Define and execute the strategic roadmap for low latency trading infrastructure across Global Equity Markets.


  • Architect and deliver high performance colocation environments, connecting exchange venues, market data providers, and internal trading systems.


  • Lead design and implementation of ultra-low latency Layer 1/Layer 2 network infrastructure between exchange colocation facilities and Citi data centers.


  • Drive selection, evaluation, and deployment of cutting-edge low latency switching, routing, timing, and telemetry technologies.


  • Work with vendors partners, exchange providers, telecom carriers, and hardware manufacturers to optimize connectivity, resiliency, and performance.


  • Design resilient cross-connect and market access strategies across global exchanges and liquidity venues.


  • Establish standards for low latency Linux infrastructure, including Operating System optimization, kernel bypass technologies, CPU isolation, NUMA optimization, interrupt tuning, and deterministic performance engineering.


  • Lead engineering teams responsible for infrastructure provisioning, bare-metal automation, deployment pipelines, hardware lifecycle management, and production engineering.


  • Develop scalable operational models enabling rapid deployment of trading infrastructure, including procurement workflows, capacity management, rack design, and colocation expansion.


  • Build highly secure and compliant environments aligned with Citi operational, cyber, and regulatory requirements.


  • Collaborate with application engineering teams to optimize end-to-end trading latency and infrastructure determinism.


  • Drive observability, performance benchmarking, packet capture analysis, and latency telemetry across the trading stack.


  • Manage relationships with exchanges, telcos, connectivity providers, and colocation operators globally.


  • Lead incident management and infrastructure resiliency programs for mission-critical trading environments.


  • Mentor and develop senior engineers and technical leads across infrastructure and platform engineering disciplines.


Required Qualifications:

  • 15+ years of experience in low latency infrastructure engineering within electronic trading, capital markets, hedge funds, trading venues or equivalent financial institutions.


  • Proven experience building and operating exchange colocation environments for Equities or multi-asset electronic trading platforms.


  • Deep expertise in low latency network design, including:


  • Arista, Cisco, Juniper, or equivalent ultra-low latency switching platforms


  • Layer 1 optimization


  • Multicast market data distribution


  • Precision timing/PTP


  • Optical transport and cross-connect architecture


  • Exchange connectivity design


  • Strong understanding of modern low latency hardware platforms, NICs, FPGA-enabled environments, and packet processing optimization.


  • Advanced Linux systems engineering expertise, particularly:


  • RHEL & Kernel tuning


  • CPU pinning and isolation


  • IRQ balancing


  • NUMA optimization


  • DPDK/XDP/kernel bypass technologies


  • Deterministic systems performance tuning


  • Experience designing resilient infrastructure across colocation facilities and large-scale enterprise data centers.


  • Strong knowledge of automation and infrastructure engineering practices using Python, Ansible, CI/CD pipelines, and infrastructure-as-code methodologies.


  • Experience managing hardware procurement, vendor negotiations, colocation buildouts, and telecom contracts.


  • Demonstrated ability to lead globally distributed engineering teams in high-pressure, mission-critical environments.


  • Strong understanding of operational risk, resiliency, cybersecurity, and regulatory requirements within financial services.


  • Excellent stakeholder management and communication skills with ability to interact effectively with senior technology leadership, trading desks, and external partners.


Job Family Group:
Technology

Job Family:
Applications Development

Time Type:
Full time

Primary Location:
Jersey City New Jersey United States

Primary Location Full Time Salary Range:
$170,000.00 - $300,000.00

In addition to salary, Citi's offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including: medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.

Most Relevant Skills
Please see the requirements listed above.

Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.

Anticipated Posting Close Date:
Aug 08, 2026

About Citigroup, Inc

Citigroup is a financial services holding company that provides financial products and services. The company operates through two segments, Global Consumer Banking (GCB) and Institutional Clients Group (ICG). The GCB segment offers traditional banking services to retail customers through retail banking, commercial banking, Citi-branded cards, and Citi retail services. The ICG segment offers various banking, and financial products and services to corporate, institutional, public sector, and high-net-worth clients. This segment provides wholesale banking products and services, including fixed-income and equity sales and trading, foreign exchange, prime brokerage, derivative services, equity and fixed-income research, corporate lending, investment banking, and advisory services, private banking, cash management, trade finance, and securities services. Citi is committed to sustainability and social responsibility, and the company invests in initiatives that promote economic progress.

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Learn more about Citigroup, Inc
Market Cap
$1.3 billion
Industry
Finance & Insurance
Net Income
$89.6 million
Founded
1812
5 Year Trend
+4.6%
NASDAQ
C
* Ladders Estimates

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