Java Algo Developer / Senior

Gravitas Recruitment Group Hong Kong; Hong Kong; On-site; HKD 900,000 - 1,300,000; Full time

Job summary

Gravitas Recruitment Group Hong Kong is seeking a senior backend Java engineer to design, build, and optimize high-speed, live trading systems in a demanding automated trading environment.

You will work on low-latency engines, multi-threaded architecture, and sophisticated market infrastructure, collaborating with traders and researchers to push the platform forward while ensuring robust, scalable delivery.

Qualifications

• 5+ years hands-on experience developing algorithmic trading or order management systems (OMS).
• Solid understanding of exchange mechanics, auction types, and regulatory frameworks.
• Outstanding problem-solving skills and the ability to make rapid, informed decisions under pressure.

Responsibilities

• Architect and upgrade low-latency algorithmic trading engines and execution platforms.
• Design and launch high-performance features on core, mission-critical systems.
• Partner with traders, quantitative researchers, and product teams to improve execution tools.
• Adapt software to handle different global market rules, liquidity constraints, and trading structures.
• Provide tier-3 technical troubleshooting and deep data analysis for core trading infrastructure.
• Research and integrate cutting-edge libraries, tools, and technical frameworks to keep the platform ahead.

Skills

Java backend

Spring ecosystem

Multi-threading

Test-Driven Development

DevOps

Tools

Docker

Kubernetes

Kdb+/Q

Time-series databases

Job description

Job Summary

This is a senior-level, hands-on software engineering role within an elite automated trading group. You will design, build, and optimize high-speed, live trading systems. The role requires deep expertise in backend Java, multi-threaded programming, and electronic trading infrastructure.

Key Responsibilities

• System Engineering: Architect and upgrade low-latency algorithmic trading engines and execution platforms.


• Feature Development: Design and launch high-performance features on core, mission-critical systems.


• Business Collaboration: Partner with traders, quantitative researchers, and product teams to improve execution tools.


• Global Market Logic: Adapt software to handle different global market rules, liquidity constraints, and trading structures.


• Advanced Support: Provide tier-3 technical troubleshooting and deep data analysis for core trading infrastructure.


• R&D: Research and integrate cutting-edge libraries, tools, and technical frameworks to keep the platform ahead.

Technical Requirements

• Advanced server-side Java skills (including Spring ecosystem).


• Deep understanding of multi-threading, concurrency, low-garbage-collection (GC) tuning, and design patterns.


• Experience processing live market data, financial order flows, and portfolio positions.


• Familiarity with smart order routing (SOR), algorithmic trading strategies (e.g., VWAP), and market microstructure.


• Strong commitment to Test-Driven Development (TDD), test automation, and DevOps practices.

Qualifications & Experience

• 5+ years of hands-on experience developing algorithmic trading or order management systems (OMS).


• Solid understanding of exchange mechanics, auction types, and regulatory frameworks.


• Outstanding problem-solving skills and the ability to make rapid, informed decisions under pressure.


• Experience with inventory management or clearing optimization models.


• Bonus Skills: Cloud platforms, containerization (Docker/Kubernetes), Kdb+/Q time-series databases, front-end development, or AI-assisted coding tools.

Simple Summary: What You Will Actually Do

To put it simply, this job is about building and maintaining the digital engines that buy and sell stocks automatically.

• The Core Task: You will write heavy backend Java code that processes massive amounts of financial data instantly.


• The Environment: It is a fast-paced, high-pressure environment where the software cannot fail or lag.


• The Goal: You are making sure trading orders are executed at the absolute best speeds and prices while obeying market rules.