C++ Software Engineer – Trade Capture
Confirmed on the employer's own hiring board on Nov 14, 2026. First seen by Alion on Oct 13, 2026. Millennium Management scores B on the Alion truth index.
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
Information Technology is core to the health and growth of our business: the firm's active, multi-manager business model demands flexible, scalable technology and advanced proprietary systems, including the development of the next generation of analytical and trading capabilities. Within Information Technology, the Trade Platform Engineering team builds and supports the systems that capture, process, and deliver the firm's trade and execution data.
What You'll Do
- Design and implement components that ingest, enrich, validate, allocate, and publish trade and execution data from electronic, voice, and manual workflows
- Build reliable, event-driven processing for trade lifecycle events, including amendments, cancellations, exercises, assignments, resets, and terminations
- Contribute to a common commissions and fees framework across asset classes, covering configurable rules, calculations, allocations, adjustments, and reconciliation
- Develop and evolve APIs, message schemas, and downstream integrations that deliver complete, accurate trade data, and contribute to future platform capabilities such as standardized interfaces, configurable workflows, and client-level entitlements and data isolation
- Help migrate business-critical workflows from legacy platforms by identifying gaps, supporting legacy coexistence and parallel runs, reconciling results, and preparing controlled cutovers
- Build operational capabilities for trade-status visibility, exception management, investigation, and correction within appropriate permissions
- Own features from design and implementation through automated testing, deployment, and operational support, and contribute to improvements in performance, reliability, replay, and recovery
- Work directly with business and technology partners to understand workflows, clarify requirements, and deliver practical solutions
What You Bring
- Knowledge of post-trade systems and workflows, including trade capture, lifecycle processing, allocations, reconciliation, and downstream accounting or back-office integration
- 5+ years of experience developing server-side C++ applications on Linux
- Strong understanding of real-time, event-driven software, with experience building reliable, high-performance systems
- Solid knowledge of network programming, Linux internals, concurrency, memory management, object-oriented design, data structures, and algorithms
- Experience with SQL and relational databases
- A strong sense of ownership and attention to quality in designing, testing, and supporting production software, with the ability to prioritize and deliver in a fast-moving environment with changing demands
- Clear communication and collaboration skills, including the ability to work with business stakeholders and technical teams to resolve ambiguous requirements
- Bachelor's degree in Computer Science, Engineering, or a related discipline, or equivalent practical experience
Salary Range
Millennium offers a total compensation package which includes a base salary, discretionary performance bonus, and comprehensive benefits. 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.