Citi’s Equities Technology organization is seeking a Low‑Latency Java Data Systems Engineer to join the Equities Electronic Execution technology team. This role is focused on building and operating the data‑plane foundations of Citi’s electronic trading ecosystem.

This role focuses on the low‑latency data plane that supports execution, routing, internalization, connectivity, and market data systems, providing event transport, sequencing, fan‑out, back‑pressure, replay, and latency‑controlled data distribution.

The engineer will work on high‑throughput, low‑latency data systems that process order lifecycle events and market data events with strict correctness and performance guarantees. This is not a trader‑facing or strategy‑implementation role; it is a core data‑systems engineering role, where Java is used as a low‑level data‑plane runtime.

The role requires close collaboration with quantitative research, product, infrastructure, production support, QA, and ...