Senior Real-Time Market Data Platform Engineer

Citi; Jersey City (NJ); On-site; USD 177,000 - 265,000; Full time

Job summary

Citi's Equities Technology organization is seeking a hands-on Senior Market Data Platform Engineer to join the Market Data Engineering team, focusing on design and delivery of Citi’s next-generation real-time market data distribution platforms supporting global Equities trading.

The senior engineer will own NUMA-aware optimizations, core pinning, lock-free concurrency, and end-to-end latency measurement, working with trading desks, infrastructure, quants, and regional teams to ensure

Qualifications

• 12+ years of hands-on engineering in low-latency, high-throughput systems.
• Experience designing real-time market data platforms in global financial institutions.
• Proficiency with UDP multicast and latency-tuned networking.

Responsibilities

• Design and develop real-time market data distribution platforms for internal consumers.
• Build and evolve performance-critical C++ components for ingestion, normalization, and fan-out.
• Own wire-to-consumer latency observability and performance diagnostics.
• Tune OS and runtime settings for NUMA, CPU isolation, and lock-free concurrency.

Skills

C++

Low-latency systems

Real-time data

Distributed systems

UDP multicast

Latency observability

Education

Bachelor's degree in Computer Science/Engineering

Tools

Aeron

Job description

Citi's Equities Technology organization is seeking a hands-on Senior Market Data Platform Engineer to join the Market Data Engineering team, focusing on design and delivery of Citi’s next-generation real-time market data distribution platforms supporting global Equities trading.

The senior engineer will own NUMA-aware optimizations, core pinning, lock-free concurrency, and end-to-end latency measurement, working with trading desks, infrastructure, quants, and regional teams to ensure