Global Leader, Real-Time Market Data Platform

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

Job summary

Citigroup Inc. in Jersey City, NJ is seeking a hands-on Senior Market Data Platform Engineer to join the Market Data Engineering team, focusing on real-time market data distribution platforms for global equities with a roadmap toward multi-asset coverage over time.

You will own low-latency C++ components, OS/runtime optimizations, and end-to-end wire-to-consumer latency, collaborating with traders, quants, and infrastructure across regions.

Qualifications

• 12+ years of hands-on engineering experience in low-latency, high-throughput systems.
• Experience designing real-time market data distribution platforms in a global financial institution (Equities required).
• Deep knowledge of NUMA, core pinning, CPU isolation, and kernel/network tuning.

Responsibilities

• Design and develop Citi’s next-generation real-time market data platforms.
• Build and evolve performance-critical C++ components for data ingestion and fan-out.
• Define platform standards for semantics, schemas, and correctness guarantees.

Skills

Low-latency systems

Real-time data

C++

Distributed systems

Aeron

Observability

Communication

Concurrency

Networking

Latency tuning

Education

Bachelor's degree in CS/Engineering

Tools

Aeron

Linux

UDP multicast

Job description

Citigroup Inc. in Jersey City, NJ is seeking a hands-on Senior Market Data Platform Engineer to join the Market Data Engineering team, focusing on real-time market data distribution platforms for global equities with a roadmap toward multi-asset coverage over time.

You will own low-latency C++ components, OS/runtime optimizations, and end-to-end wire-to-consumer latency, collaborating with traders, quants, and infrastructure across regions.