Project Description: We are seeking an experienced Senior C# Developer to join a collaborative engineering team focused on enhancing Portfolio Management capabilities. This role will partner closely with engineering, trading, risk, and operations teams to design and deliver scalable, high-performance solutions that improve portfolio transparency, accuracy, and operational efficiency across the firm. The ideal candidate combines strong technical expertise in C#/.NET with a deep understanding of portfolio and position management concepts, and an interest in modern development practices including AI-enabled engineering and specification-driven development. Responsibilities: - Portfolio Management Enhancement Partner with cross-functional teams to improve and extend portfolio management capabilities Enhance portfolio aggregation, exposure calculation, and P&L reporting functionality Improve intraday and end-of-day position workflows and controls Contribute to strategic initiatives modernizing portfolio and position infrastructure - Core Development Design, develop, and maintain high-performance services in C# / .NET Contribute to the evolution of the Position Service architecture Develop and enhance functionality within the Portfolio Management platform Build scalable, resilient microservices supporting portfolio and order management workflows Write clean, maintainable, and well-tested code following engineering best practices - AI & Intelligent Systems Identify opportunities to leverage AI/ML and automation to enhance portfolio analytics, reconciliation, monitoring, and operational workflows Collaborate on integrating AI-driven tools into the development lifecycle (e.G., intelligent code generation, review, testing, and documentation) Contribute to the design of systems that enable advanced analytics and data-driven insights - Specification-Driven