Senior Java Algo Engineer - Real-Time Equity Trading

Millennium Management LLC; Greater London; On-site; GBP 140,000 - 210,000; Full time

Job summary

Millennium is recruiting a Java Algo Developer for EQ Trading Technology in London. You will build and optimize real-time algorithmic trading systems, focusing on low-latency execution and scalable infrastructure.

Work with Portfolio Managers and trading partners to evolve execution platforms, leveraging Java, Kafka, and modern distributed architectures to meet performance and regulatory requirements.

Qualifications

• 7+ years of experience with equities execution systems.
• Experience developing execution algorithms such as VWAP, TWAP, Inline, and Pairs.
• Experience working on matching engines and dark pools.
• Experience implementing automated testing strategies for algorithms, including simulation, backtesting, regression suites, and replay frameworks.
• Deep understanding of market microstructure, pre-trade risk checks, limit frameworks, and regulatory requirements, and how they affect execution algorithm performance.
• Expert-level Java skills, with extensive experience building low-latency, GC-aware, high-throughput distributed systems.
• Strong understanding of distributed, event-driven architectures and messaging technologies such as Kafka, Solace, or similar tools.

Responsibilities

• Partner closely with technologists, Execution Services, and Equity Finance teams to enhance the firm’s execution offering for Portfolio Managers.
• Build and evolve real-time algorithmic trading systems and execution platforms in a fast-paced environment.
• Develop high-quality new features and enhance functionality on a mission-critical platform.
• Design and upgrade software to meet performance, scalability, and quality expectations.
• Translate business requirements and market constraints across developed and emerging markets into effective technical solutions.
• Stay current on relevant technologies, tools, technical libraries, computing environments, and academic research.
• Support data analysis and provide L3 troubleshooting for issues affecting critical trading infrastructure.

Skills

Execution systems

Algorithmic trading

Low-latency

Distributed architectures

Trading platforms

Tools

Java

Kafka

Solace

AI tools

Container frameworks

Job description

Millennium is recruiting a Java Algo Developer for EQ Trading Technology in London. You will build and optimize real-time algorithmic trading systems, focusing on low-latency execution and scalable infrastructure.

Work with Portfolio Managers and trading partners to evolve execution platforms, leveraging Java, Kafka, and modern distributed architectures to meet performance and regulatory requirements.