Senior C++ Market Data Engineer

The SPEED Market Data team seeks a hands-on Technical Lead who will own and drive a critical workstream focused on architecting, implementing,monitoring, and supporting low-latency C++ systems that are robust, resilient,accurate, stable, and blindingly fast. By leading the design and evolution of this high-performance infrastructure, you will help position MLP as a leader in quantitative trading. You will shape the future of this industry while working alongside other exceptional engineers and strategists to solve some of the most significant engineering problems in the world.

We are looking for a strong technical leader with financialmarketstechnology experience and real-time market dataexpertiseto design, build, and support our global real-time (both low-latency and non-latency-sensitive) market data platform.This role emphasizes technical leadership, architectural ownership, and cross-team coordination rather than people management.The successful candidate will be comfortable owning a workstream end-to-end—covering design, implementation, monitoring, support, and stakeholder management—while ensuring stability of the existing environment and driving platform improvements.

Principal Responsibilities

• Act as the technical owner for a major market data workstream, setting technical direction, defining architecture, and driving execution across the full lifecycle. 

• Collaborate with hardware and software teams across divisions to design and build real-time market data processing and distribution systems. 

• Lead and drive new technical initiatives for the team, including evaluating technologies, defining standards, andestablishingbest practices. 

• Design and develop systems, interfaces, and tools for historical market data and trading simulations that increase research productivity. 

• Architect and implement components ofanenterprise market data platform, including components forcaching,aggregation,conflationandvalue-addeddata enrichment. 

• Optimize platform performance using network and systems programming, and advanced low-latency techniques (CPU, NIC, kernel, and application-level tuning). 

• Lead the design and maintenance of automated test and benchmark frameworks, and tools for risk management, performance tracking, and system validation. 

• Provide technical leadership for the support and operation of both enterprise real-time market data environments, including coordinating internal, vendor, and exchange-driven changes. 

• Design and engineer components to automate support and management of the market data platform, including monitoring, real-time and historical metrics collection/visualization, and self-service administrative/user tools. 

• Serve as a primary technical liaison for users of the market data environment (Portfolio Managers, trading desks, and core technology teams), translating requirements into robust technical solutions. 

• Lead the enhancement of processes and workflows foroperatingthe market data platform (release/deployment, incident management and remediation, exchange notification handling,definingand enforcing SLAs). 

• Mentor and influence other engineers through code reviews, design reviews, and hands-on guidance, fostering a culture of technical excellence and accountability.

Qualifications / Skills Required

• Degree in Computer Science or a related field with a strong background in data structures, algorithms, and object-oriented programming inmodernC++. 

• Deep understanding of Linux system internals and networking, especially in low-latency and high-throughput environments. 

• Strong knowledge of CPU architecture and the ability toleverageCPU capabilities for performance optimization. 

• Demonstrated experience acting as a technical lead or senior engineer owning complex systems or workstreams end-to-end (design, delivery, and operations). 

• Able to prioritize and make trade-offs in a fast-moving, high-pressure, constantly changing environment;strong senseof urgency, ownership, and follow-through. 

• Strong belief in and practice of extreme ownership, witha track recordof taking accountability for systems in production. 

• Effective communication and stakeholder management skills: able to work closely with business and technology users, understand their needs, and driveappropriate technicalsolutions. 

• Experiencebuilding solutions oncloudenvironmentssuch as GCP and AWS.  

• Knowledge ofadditionalprogramming languages such as Java, Python, or scripting (Perl, shell). 

• Technical background in application development on complex market data systems (e.g., Bloomberg, Thomson Reuters, etc.). 

• Experience supporting market data environments within a global organization, including internally developed DMA feed handlers and distribution infrastructure. 

• Strong understanding of market data concepts and functionality, including data models (fields/messages), protocols (e.g., snapshot + delta), order book representations (L1/L2/L3), recovery, and reliability. 

• Hands-on Site Reliability Engineering or DevOps experience, including system administration, automation, measurement, and release/deployment management. 

• Experience with monitoring, metrics, and command/control tooling for distributed market data platforms, with the ability to evaluate existing solutions and drive enhancements across development and operations. 

• Ability tooperatewitha high levelof thoroughness and attention to detail,demonstratingstrong ownership of deliverables and production systems.

Millennium pays a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package. 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. 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.