Core Site Reliability Engineer

Selby Jennings; Hong Kong; On-site; HKD 900,000 - 1,200,000; Full time

Job summary

Selby Jennings is seeking a Core Site Reliability Engineer to operate at the intersection of software engineering, production operations, and trading infrastructure. You will ensure reliability, scalability, and performance of global electronic trading platforms, collaborating with developers, traders, and infrastructure teams.

This role emphasizes building automation, improving monitoring, and reducing toil in a high-pressure, latency-sensitive environment.

Qualifications

• Strong software engineering skills in Python, C++, or another modern programming language.
• Understanding of networking fundamentals, including TCP/IP and multicast.
• Familiarity with monitoring, observability, and automation tooling.
• Strong problem-solving and debugging capabilities.
• Ability to remain calm and communicate effectively during high-pressure production incidents.

Responsibilities

• Own the health, stability, and performance of critical trading systems.
• Investigate and troubleshoot complex issues spanning applications, infrastructure, networks, and market connectivity.
• Build tools and automation to eliminate operational toil.
• Improve monitoring, observability, and alerting across production environments.
• Support and optimise ultra-low latency trading infrastructure.
• Partner with traders, developers, and operations teams to improve platform reliability and efficiency.
• Drive continuous improvements across deployments, troubleshooting workflows, and operational processes.

Skills

Python

C++

Networking fundamentals

Observability tooling

Troubleshooting

Incident response

System reliability

Tools

Monitoring tools

Automation tooling

Job description

Our client is a global quantitative hedge fund operating across major liquid asset classes worldwide. The firm combines technology, data, and quantitative research to drive investment decisions, with engineering and infrastructure forming the backbone of its trading platforms.

The Core Trading Platform team is responsible for building and operating the firm's global electronic trading infrastructure, supporting ultra-low latency systems that power real-time trading across global markets.

We welcome applicants from across the globe. Relocation support will be provided for suitable candidates.

We Are Seeking: Core Site Reliability Engineer

This is not a traditional support role.

You'll operate at the intersection of software engineering, production operations, and trading infrastructure, helping ensure that business-critical systems remain reliable, scalable, and performant.

You'll work closely with developers, traders, and infrastructure teams to investigate complex issues, improve system reliability, automate operational processes, and optimise platform performance.

We are particularly interested in candidates with previous experience within buy-side firms, hedge funds, proprietary trading firms, or other performance-sensitive environments.

Key Responsibilities

• Own the health, stability, and performance of critical trading systems
• Investigate and troubleshoot complex issues spanning applications, infrastructure, networks, and market connectivity
• Build tools and automation to eliminate operational toil
• Improve monitoring, observability, and alerting across production environments
• Support and optimise ultra-low latency trading infrastructure
• Partner with traders, developers, and operations teams to improve platform reliability and efficiency
• Drive continuous improvements across deployments, troubleshooting workflows, and operational processes

Requirements

• Strong software engineering skills in Python, C++, or another modern programming language
• Understanding of networking fundamentals, including TCP/IP and multicast
• Familiarity with monitoring, observability, and automation tooling
• Strong problem-solving and debugging capabilities
• Ability to remain calm and communicate effectively during high-pressure production incidents
• Passion for building reliable, scalable, and operable systems

Highly Relevant Experience

• Experience supporting low-latency or trading systems
• Building automation and self-service tooling
• Performance tuning across applications, operating systems, or infrastructure
• Working within high-availability or mission-critical environments

What We\'re Looking For

• Someone who enjoys understanding how systems work under the hood
• A natural troubleshooter who focuses on root causes, not symptoms
• An engineer who automates repetitive processes whenever possible
• A strong sense of ownership and operational responsibility
• Curiosity, adaptability, and a passion for continuous learning

Why Join Us

• Work on infrastructure directly supporting global trading platforms
• Solve complex engineering challenges across software, systems, and networks
• Gain exposure to distributed systems, low-latency environments, and real-time trading infrastructure
• Join a highly technical team with broad ownership and significant impact

Selby Jennings is a Trading Style of Phaidon International (License Number 16S8194)