Core Java Trading Platform Engineer

A Global Financial firm is seeking a Core Java Trading Platform Engineer (Low-Latency Trading Systems Developer) to join its Global Execution Services (GES) Technology team in Japan, to focus on building and optimizing high-performance electronic trading platforms, exchange and dark-pool connectivity, and real-time execution systems, while contributing across the full SDLC and providing L3 production support in a global team environment.

Responsibilities:
- Develop and optimize low-latency, high-throughput trading systems, including exchange/dark-pool gateways and real-time data pipelines
- Design fault-tolerant solutions and tune JVM, GC, networking, and overall application performance
- Work with product teams, stakeholders, & users to define requirements, priorities, & technical solutions
- Deliver high-quality software across the full SDLC, including development, testing, documentation, releases, and maintenance
- Provide L3 production support, resolving technical and functional issues and coordinating with global development, QA, support, and client teams
- Contribute to architecture, design, code reviews, and software delivery best practices
- Strong experience with low-latency trading systems, FIX protocol, and multicast messaging

Required Skills:
- Excellent technical skills in Core Java (Linux environment)(+3 years minimum experience)
- Ability to exhibit high level of professionalism in team-oriented environment
- Team player that can work with people across different departments, countries and regions
- Very detail oriented with excellent analytical skills
- Highly proactive and takes initiative to identify problem areas and evolve solutions
- Gitlab CI－Continuous Integration
- Experience of Trading System Development and/or Complex Event Processing
- Deep understanding of multithreading, NIO, concurrency, lock-free data structures, and GC tuning
- Understanding of memory management, multi-threading - concurrency and synchronization.
- Experience with memory-mapped files, off-heap storage, or zero-copy I/O

Why should I apply:
- Highly diverse and inclusive team
- Exposure to global financial systems and compliance technologies
- Opportunity for high impact contribution to team
- Work under an internationally integrated organization (London HQ, Japan sub-structure)


Company Details: 
Headquartered in Tokyo with offices in Hong Kong, London, and New York, it is Japan's largest securities firm, employing approximately 26,000 staff worldwide and offering a full range of equity, fixed income, foreign exchange, and other investment products and services.

Working Hours: 08:40 – 17:40
Workstyle:  5 days in office.
Benefits: Social insurance, pension, transportation, etc.
Interview Process: 3-4 round