C++ Developer

About Millennium
Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium's mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team
The Information Technology organization is core to the health and growth of Millennium's business, supporting a flexible, scalable technology environment and advanced proprietary systems across the firm. This team builds and operates the C++ backend services that power Millennium's real-time risk and P&L platform-a distributed system of microservices running on AWS and Kubernetes, processing large-scale financial data with strict latency requirements. The team's production services run 24/5, and the team collaborates closely with quantitative developers, platform engineers, and business stakeholders.

What You'll Do
• Design, build, and operate high-performance C++ services that compute real-time pricing, risk, and P&L across fixed income and credit instruments.
• Own service reliability end to end, including monitoring, alerting, incident response, and root cause analysis in a live production environment.
• Write thread-safe, exception-safe C++ code for concurrent, near-real-time workloads with hard latency targets.
• Optimize service performance by profiling hotspots, reducing memory allocations, improving cache behavior, and tuning throughput under load.
• Integrate C++ services with upstream and downstream systems via Kafka, Protobuf, and internal APIs.
• Contribute to the CI/CD pipeline, including automated regression testing, A/B deployment, and blue/green release management.
• Promote engineering best practices, including code review, exception safety, RAII patterns, and robust error handling in a multithreaded environment.

What You Bring
• A bachelor's degree from a leading university in computer science, software engineering, or a related discipline; advanced qualifications are a plus.
• Up to five years of professional experience in C++ service or systems development.
• Strong hands-on experience with modern C++ (C++17/C++20), including move semantics, smart pointers, RAII, templates, and constexpr, along with a solid understanding of multithreading and concurrency, including mutexes, atomics, lock-free structures, thread pools, and race condition debugging.
• Experience building and operating long-running backend services, not just libraries or batch jobs.
• Familiarity with service-oriented architecture, message queues such as Kafka, and serialization frameworks such as Protobuf or FlatBuffers.
• Proficiency with Linux, GDB or LLDB, profiling tools such as perf, Valgrind, and AddressSanitizer, and CI/CD pipelines.
• Strong analytical and troubleshooting skills, including comfort diagnosing production issues under pressure, and clear communication skills with the ability to work effectively across teams in a fast-paced environment.
• Experience with reactive or event-driven programming patterns, familiarity with containerized deployments such as Docker and Kubernetes, or exposure to financial services, pricing models, or risk systems is a plus.