Senior/Staff Software Engineer, C++ - Trading Service

Leadingnation; Hong Kong; On-site; HKD 1,103,000 - 1,716,000; Full time

Benefits offered by this job

Competitive compensation

Education subsidy

Team events

Wellness and meals

Healthcare coverage

Job summary

OKX's Trading Systems team is building mission-critical order, execution, and risk infrastructure that powers our global trading platform. We are seeking a Senior C++ Software Engineer to lead the design and evolution of trading counter and core systems.

The role requires deep systems expertise, ownership, and a track record of delivering robust, high-performance software in Linux environments. You will mentor engineers, drive quality, and collaborate across global teams to raise engineering

Qualifications

• 5+ years of hands-on software engineering experience building production C++ systems.
• Strong experience designing complex systems and architectural trade-offs.
• Proven knowledge of concurrency, networking, and Linux-based performance.
• Experience with distributed consistency, high availability, fault tolerance, or disaster recovery.
• Ownership mindset from problem to solution and validation.
• Excellent debugging and analytical skills; proactive problem solver.
• Experience with automated tests, replay, or similar verification.

Responsibilities

• Lead architecture, design, and development of high-performance C++ trading systems.
• Design reliable distributed systems with fault tolerance and disaster recovery.
• Own end-to-end work from proposals through deployment and validation.
• Solve low-level challenges in networking, memory, and performance.
• Drive architectural improvements and refactor monolithic designs.
• Build quality safeguards: automated tests, failure-injection, monitoring.
• Design experiments to validate architectural assumptions and diagnose issues.
• Collaborate across heterogeneous stacks and boundaries.
• Apply AI-assisted engineering practices across code understanding and reviews.
• Mentor engineers and share knowledge through docs and playbooks.

Skills

C++

Distributed systems

Multithreading

Networking

Performance optimization

Debugging

Ownership

Code reviews

Education

Bachelor's degree in CS/SE

Tools

Linux tooling

Job description

OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa

About OKX

At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.

About the Opportunity

The Trading Systems team builds the mission-critical order, execution, position, and risk infrastructure that powers OKX's global trading platform. We operate at the intersection of high performance, correctness, resilience, and scale-where every design decision matters.

We are seeking a Senior C++ Software Engineer to lead the design and evolution of our trading counter and core trading systems. This role is for an engineer who combines deep systems expertise with strong ownership: someone who investigates root causes, raises the quality bar across the engineering lifecycle, and turns individual learning into reusable team capability.

What You'll Be Doing

• Lead the architecture, design, and development of complex, high-performance C++ trading systems.
• Design reliable distributed systems, including consistency, fault tolerance, disaster recovery, and resilience strategies across system boundaries.
• Own work end to end—from technical proposals and design reviews through framework refactoring, implementation, deployment, production debugging, replay, and validation.
• Solve low-level systems challenges involving networking, protocols, concurrency, memory management, performance, and operating-system-level behaviour.
• Drive architectural improvements by identifying systemic issues and anti-patterns, such as overly coupled or "God Class" designs, and redesigning components with clear responsibilities.
• Build proactive quality safeguards, including automated testing, failure-injection scenarios, stability validation, monitoring, and replay-based verification.
• Design controlled experiments to validate architectural assumptions and diagnose complex production issues beyond surface-level symptoms.
• Work effectively across heterogeneous technology stacks, making sound engineering decisions at language, service, and platform boundaries.
• Independently explore and apply AI-assisted engineering practices across code understanding, solution design, cross-review, incident analysis, test validation, and knowledge capture.
• Raise engineering standards through thoughtful code reviews, technical discussions, and continuous improvements to development practices.
• Mentor engineers and share practical knowledge through documentation, playbooks, technical sessions, and reusable frameworks.

What We Look For In You

• Bachelor's degree or above in Computer Science, Software Engineering, or a related STEM field; equivalent practical experience is also valued.
• 5+ years of hands-on software engineering experience, with substantial experience building production C++ systems.
• Strong experience designing and evolving complex systems, with a clear understanding of architectural trade-offs.
• Proven knowledge of concurrency, multithreading, network programming, and performance optimisation in Linux-based environments.
• Hands-on experience with distributed consistency, high availability, fault tolerance, disaster recovery, or other system-level reliability designs.
• Strong understanding of computer systems fundamentals, including networking protocols, operating systems, memory, storage, and runtime behaviour.
• A track record of taking ownership proactively, from defining the problem to delivering and validating a robust solution.
• Exceptional debugging and analytical ability, with a habit of investigating why issues occur—not simply applying short-term fixes.
• Experience using automated tests, simulation, replay, or comparative experiments to validate system behaviour and reliability.
• Clear communication skills and a collaborative mindset; able to turn experience into documentation, standards, and practices that help the whole team.

Nice to Haves

• Experience with exchange, brokerage, trading counter, order management, execution, market data, or other low-latency financial systems.
• Experience with event-driven architectures, messaging systems, or high-throughput distributed platforms.
• Familiarity with Rust, Java, Go, Python, or other languages used in multi-language production environments.
• Practical experience applying AI tools to improve software engineering workflows and code quality.
• Experience working with globally distributed, cross-functional engineering teams.

Perks & Benefits

• Competitive total compensation package
• L&D programs and Education subsidy for employees' growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for employees and dependants
• More that we love to tell you along the process!