Staff full - stack engineer building Thunderbolt, Thunderbird’s open - source enterprise AI client. Shipping integrations, customizations, and deployments for technical partners and enterprise customers.
About the role
- Senior Software Engineer building AlphaSense AI-powered Excel plugins for financial professionals. Improving desktop performance, enterprise integrations, and research workflows.
Responsibilities
- Architect and build a production-grade Excel plugin integrating AlphaSense's AI capabilities
- Navigate Excel's object model, calculation engine, and event system to create native-feeling features connected to cloud intelligence
- Ensure compatibility across Excel 2016, Excel 2019, and Office 365, including corporate proxies, SSO, offline scenarios, and IT restrictions
- Optimize memory and performance so the plugin does not slow down Excel
- Translate financial users' needs into intuitive interfaces for AI capabilities
- Define desktop development patterns and mentor engineers on testing, deployment, and monitoring for Office plugins
- Ship improvements to AlphaSense's internal Excel add-in and migrate it from legacy infrastructure to AlphaSense's platform
- Establish the technical foundation and best practices for the Office integration strategy
Requirements
- 5+ years building production software, with significant experience in desktop applications or Office add-ins
- Deep expertise in C#, .NET and modern development practices
- Strong understanding of asynchronous programming, state management, and event-driven architectures
- Experience with enterprise software deployment, updates, and version management
- Track record of building performant applications with excellent error handling and recovery
- Excellence in debugging complex integration issues and memory/performance optimization
- Strong testing philosophy adapted to desktop environments
- Ability to mentor teams and establish development best practices
- Production experience with C#, VSTO, or COM add-ins
- Knowledge of Excel's calculation engine, object model, and common power-user patterns
- Knowledge of AWS
- Understanding of financial modeling, data analysis workflows, or trading systems
- Experience with web development technologies
- Familiarity with financial data formats (XLSX, CSV, JSON) and transformations
- Background in building offline-capable applications with sync mechanisms
- Experience with WebSocket, real-time data feeds, or streaming architectures
Benefits
- Equity may be offered
- Generous benefits program
- Reasonable accommodation for qualified employees with protected disabilities, as required by applicable laws
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