C# Software Engineer

Millennium’s Excel platform is a world-class system that provides investment teams with a suite of proprietary formulas for retrieving Millennium data inside Excel. The data sets available are sourced from many applications and teams across the Firm and are continually growing and expanding. We are looking for a talented Software Engineer to help enhance and maintain Millennium’s Excel platform. In this role, you will contribute hands-on to the design and implementation of new features as well as support existing functionality. You will collaborate closely with Equity Portfolio and Business Management teams to understand their requirements and translate them into robust solutions in Excel. Job Responsibilities Collaborate with internal data source owners and Technology teams to facilitate strategic and accurate data delivery functionality through ExcelImplement new keyword formulas to facilitate data retrieval across systemsEnhance existing Excel add-in with functionality based on user requirementsCollaborate with internal teams to support AI-driven capabilities surrounding our Excel platform, including Wiki content search, workbook interaction, and model buildingMaintain, support, and improve capabilities as new requirements arise over timeWork jointly with Portfolio Management and Equities Management teams to capture requirements, monitor delivery, and manage expectationsFit into the active culture of Millennium, judged by the ability to deliver timely solutions to portfolio managers within the Firm Qualifications & Requirements 5+ years of hands-on professional experience in distributed Excel development environment, ideally within electronic tradingExperience developing Excel add-ins in C# using Excel-DNA/VSTO/COMExperience with ASP.NET Core Web API platform for developing scalable REST APIsExperience with CI/CD lifecycle, including deployment of services on Windows Server with IISUnderstanding of authentication and authorization mechanisms for secure system integration across Windows and Linux environmentsExperience with Python and commonly used frameworks and librariesExperience with AI/LLM concepts, models, libraries, and toolingStrong analytical and problem-solving abilitiesAbility to work independently in a fast-paced environmentSolid communication skills Additional Experience (Plus) Experience with Office.js framework for developing modern JavaScript-based Excel Add-Ins, including ribbons commands, task panes, and custom functionsExperience with VBA for automating Excel workflows in a robust and reliable wayUnderstanding of Equity markets, trading, and market data (Bloomberg) 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.