C++ Engineer - Equities Execution Technology

We are seeking a Senior Platform Software Developer to join our Execution Technology team, focusing on the design, development, and optimization of our Global Multi-Asset Order Management Systems (OMS). You will work as part of a team to a build highly performant, scalable, reliable platform critical to our trading success.

Key Responsibilities

• Design and develop high-performance order management and related technical services & components, handling thousands of events per second with microsecond latency

• Collaborate closely with other technology teams to design & implement new trading workflows and features

• Optimize system performance through profiling, code optimization, and infrastructure improvements

• Ensure system reliability with comprehensive testing, monitoring, and fail-over mechanisms

• Mentor junior developers and contribute to architectural decisions

Required Qualifications:

Technical Skills:

• Expert-level proficiency in C++, with deep understanding of performance optimization

• Strong experience with order management systems, trade execution, or market data systems

• Solid knowledge of FIX & Binary Trading protocols and electronic trading workflows

• Experience with event-based low-latency system design

• Familiarity with Linux/Unix environments and shell scripting

• Understanding of network programming, async UDP TCP/IP and OS optimizations

Financial Markets Knowledge:

• Deep understanding of cross-asset products & markets structure

• Experience of order types, market microstructure, and execution algorithms

• Familiarity with Market-Data distribution systems

• Awareness of trading risk management, compliance concepts and regulatory concepts

Soft Skills:

• Strong analytical and problem-solving abilities

• Excellent communication skills with ability to work with non-technical stakeholders

• Thrives in fast-paced environment with tight deadlines

• Detail-oriented with focus on system reliability and accuracy

Preferred Qualifications:

• Degree in Computer Science, Engineering

• Experience with KDB+/Q, Python, or other data analysis tools

• Prior experience with low-latency Java would be helpful, but not required

• Exposure to cloud platforms (AWS/GCP) and containerization

• Background in trading , application

• Experience with event streams, event loops & async io patterns,, distributed systems, and microservices architecture

• Prior hedge fund or proprietary trading firm experience an advantage

Technology Stack

• Languages: C++, KDB, Java

• Messaging: Trading protocols,

• Development: Git, Jenkins

The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future. Millennium pays a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package. When finalizing an offer, we take into consideration an individual’s experience level and the qualifications they bring to the role to formulate a competitive total compensation package.