Senior Java Developer (Trading Platform)

Team: Trading Infrastructure

Location: Hong Kong, Hong Kong SAR

Commitment: Full-time

Workplace Type: hybrid

Responsibilities

• Design and develop core backend systems including market connectivity, order routing, execution engine, risk, and position tracking.
• Implement ultra-low-latency and GC-free components using best practices in lock-free and off-heap programming.
• Apply event-driven and fully deterministic design principles to ensure traceable and predictable system behavior.
• Collaborate closely with product and trading teams to translate requirements into performant, production-ready solutions.
• Participate in performance profiling, JVM tuning, and debugging complex issues in production.
• Develop and maintain automated test suites and CI/CD pipelines.
• Engage in code reviews, architecture discussions, and technical audits to ensure high standards across the codebase.
• Use AI-driven coding tools (e.g., GitHub Copilot or similar) to accelerate development and improve productivity where appropriate.

Requirements

• 8+ years of Java backend development experience, preferably in a trading or real-time system environment.
• Deep understanding of Java core internals, multithreading, memory models, and garbage collection.
• Proven experience in GC-free or low-GC programming, including use of sun.misc.Unsafe, direct buffers, and memory-mapped files.
• Familiarity with Aeron, SBE, or other low-latency messaging libraries.
• Strong grasp of event-driven architecture and experience designing fully deterministic systems.
• Solid knowledge of time-series and analytical databases like ClickHouse; exposure to kdb+ or InfluxDB is a plus.
• Experience with distributed systems, message queues, and performance tuning at the network and application layer.
• Comfortable using AI-powered development tools to enhance code quality and development speed.
• Strong testing discipline including TDD, benchmarking, and resilience testing.

Communication and Collaboration

• Proficient in English (spoken and written); Chinese or other languages are a plus but not required.
• Comfortable working in a global team with colleagues across APAC, EMEA, and North America.
• Strong communication skills; able to interface across all levels from senior leadership to engineers and stakeholders.
• Able to collaborate effectively with people from different cultural and technical backgrounds, aligning tech decisions with business goals.