Senior Quantitative Trading Systems Engineer

Selby Jennings; Hong Kong; On-site; HKD 900,000 - 1,800,000; Full time

Job summary

Selby Jennings in Hong Kong seeks an experienced Java developer to lead the design and build of a low-latency EMS/Smart Order Router and the next generation of our trading architecture. You will collaborate with traders, product managers and external partners to implement routing algorithms, optimize throughput, monitor real-world performance, and ensure resilience in a fast-paced, global environment.

A proactive, problem‑solving mindset and strong knowledge of concurrency, networking and market

Qualifications

• 8+ years of experience developing routing strategies for specific markets in Java.
• Knowledge of tick data analytics and real-time market data processing.
• Familiarity with cloud-based market access or hybrid deployments.
• Experience working in high-frequency or algorithmic trading environments.
• Experience building low-latency systems and working with multicast/unicast market data feeds.
• Understanding of the application and infrastructure stack for electronic and algorithmic trading.
• Strong technical background with ability to understand system architecture and workflows.
• Proficiency with trading system architecture (OMS/EMS, market gateways).
• Strong understanding of concurrency, networking, and memory management.
• Experience with Linux systems and performance profiling tools.

Responsibilities

• Design and development of a low-latency, high-throughput EMS/Smart Order Router system.
• Implement intelligent routing algorithms based on execution quality, liquidity, latency, and cost.
• Collaborate with traders and product managers to refine routing logic and build new algorithmic capabilities.
• Monitor and optimize system performance under real-world trading conditions.
• Contribute to system resilience and business continuity.
• Provide support for production trading issues.
• Embrace AI to improve team performance and business outcomes.
• Leverage AI tools to improve productivity, decision-making, and output quality.

Skills

Java

Low-latency systems

Algorithmic trading

Distributed systems

Linux

Concurrency

Networking

Performance profiling

Tools

AWS

GCP

Job description

Selby Jennings in Hong Kong seeks an experienced Java developer to lead the design and build of a low-latency EMS/Smart Order Router and the next generation of our trading architecture. You will collaborate with traders, product managers and external partners to implement routing algorithms, optimize throughput, monitor real-world performance, and ensure resilience in a fast-paced, global environment.

A proactive, problem‑solving mindset and strong knowledge of concurrency, networking and market