Low Latency Trading Infrastructure Engineer

Citi

. Design low-latency compute topologies using bare-metal servers, NICs, kernel-bypass technologies, and FPGA/co-location hardware .

Posted 11/4/2026full-timeUnited StatesMid-LevelSenior💰 $125,600 - $188,400 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in low-latency infrastructure engineering, including the design and maintenance of high-performance trading systems, network architecture, and benchmarking tools. Proficient in managing complex environments with a focus on compliance, documentation, and vendor coordination.

Highest-signal resume keywords

Low Latency Infrastructure EngineeringColocation Environment ManagementAdvanced Linux Systems EngineeringNetwork Architecture and OptimizationInfrastructure Automation with Ansible

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Low Latency Network ArchitectureKernel TuningCPU Pinning and IsolationDPDKPython ScriptingKubernetes ManagementInfiniBand NetworkingBenchmarking and Telemetry ToolsFirmware and BIOS TuningCircuit Validation

Soft Skills

Strong Written CommunicationMeticulous Documentation Habits

Tools & Technologies

AnsibleTerraformPuppetWiresharkTcpdumpJenkinsGitLab CI/CDGitHub ActionsOpenShiftAmazon EKS

Industry Keywords

Electronic TradingCapital MarketsHedge FundsMarket Data DistributionPrecision Time ProtocolMiFID II ComplianceChange-Control FrameworksHigh-Performance ComputingVendor CoordinationTelecom Processes

Tech Stack

Tools & technologies

AnsibleDNSJenkinsKubernetesLinuxMicroservicesOpenShiftPuppetPythonSwitchingTerraform

About the role

Key responsibilities & impact

Design low-latency compute topologies using bare-metal servers, NICs, kernel-bypass technologies, and FPGA/co-location hardware
Evaluate CPU microarchitecture, NUMA topology, cache behavior, and memory bandwidth for trading workloads
Define hardware and firmware standards with technology vendors
Design and maintain custom server build patterns for the low-latency trading platform
Establish and enforce low-latency Linux, Windows, and microservice infrastructure standards
Build benchmarking harnesses to measure tick-to-trade latency, jitter, and throughput
Conduct hardware, firmware, and BIOS tuning analysis
Correlate benchmark results with trading telemetry
Drive packet capture analysis and latency telemetry across the trading stack
Architect and deliver high-performance colocation environments connecting exchanges, market data providers, and internal trading systems
Implement Layer 1/Layer 2 network configurations
Execute certification test plans and maintain audit-ready documentation
Coordinate with Risk, InfoSec, exchange, venue, and colocation teams on certification and regulatory requirements
Provision infrastructure in air-gapped or network-segmented environments
Manage offline image and firmware distribution and strict change/rollback procedures
Deploy and support connectivity circuits, cross-connects, and handoff validation
Lead bare-metal automation, deployment pipelines, and infrastructure-as-code using Ansible, Terraform, and Puppet
Manage Active Directory, ISA, DNS, PTP, remote access, and infrastructure management/monitoring technologies
Monitor compute health, latency drift, and hardware degradation
Manage hardware lifecycle refreshes, firmware end-of-life tracking, and vendor support coordination
Troubleshoot hardware, OS, and network issues during time-sensitive market conditions
Manage Kubernetes clusters and workload orchestration for trading-adjacent microservices
Implement and maintain InfiniBand, RoCE, and multicast networking
Collaborate with application, support, trading, risk, security, compliance, vendor, exchange, and infrastructure teams
Participate in incident management, resiliency efforts, post-incident documentation, and root cause analysis
Produce documentation for audits and regulatory reviews
Support procurement, vendor engagement, colocation buildouts, and telecom contract processes
Support off-hours maintenance and rapid incident response during market-critical periods

Requirements

What you’ll need

6+ years of hands-on experience in low latency infrastructure engineering within electronic trading, capital markets, hedge funds, trading venues, or equivalent high-performance financial technology environments
Hands-on experience building and operating exchange colocation environments for Equities or multi-asset electronic trading platforms, including physical rack management, cross-connect provisioning, and circuit validation
Deep technical expertise in low latency network architecture, ultra-low latency switching, multicast market data distribution, and Precision Time Protocol (PTP)
Advanced Linux systems engineering proficiency in RHEL and equivalent distributions
Experience with kernel tuning, CPU pinning and isolation, NUMA optimization, IRQ affinity, C-state/P-state management, and huge pages configuration
Experience with DPDK, XDP, Solarflare OpenOnload, and FPGA-based NIC solutions
Proficiency in Python, Bash, or equivalent scripting languages
Experience building benchmarking, telemetry collection, and infrastructure provisioning tooling in air-gapped or tightly controlled environments
Experience with Ansible, Terraform, or Puppet
Experience with CI/CD using Jenkins, GitLab CI/CD, GitHub Actions, or ArgoCD
Experience with Kubernetes; OpenShift or Amazon EKS preferred
Proficiency with InfiniBand, RoCE, and multicast networking
Experience with Wireshark, tcpdump, hardware performance counters, and latency measurement frameworks
Understanding of low latency hardware, NICs, and FPGA-enabled compute environments
Familiarity with exchange connectivity rules, CAT requirements, MiFID II time synchronization standards, and change-control/compliance frameworks
Meticulous documentation habits and strong written communication skills
Experience supporting hardware procurement, vendor coordination, colocation buildouts, and telecom processes
Bachelor's degree in Computer Science, Electrical Engineering, Information Technology, or related technical discipline, or equivalent practical experience in a highly specialized low-latency or high-performance computing environment

Benefits

Comp & perks

Medical, dental & vision coverage
401(k)
Life, accident, and disability insurance
Wellness programs
Paid vacation/planned time off
Sick leave/unplanned time off
Paid holidays
Discretionary and formulaic incentive and retention awards may be available for eligible employees