Location: Remote
Contract Duration: 12 Months and extendable
Domain Experience: Fintech (non negotiable)

Role Overview
We are seeking an experienced Lead VSTO Engineer to drive the development, architecture, and deployment of enterprise-grade Office Add-ins across PowerPoint, Excel, and Word. In this role, you will lead a dedicated engineering team in building scalable, cloud-connected content libraries, formatting engines, and data-driven document automation tools. You will bridge desktop engineering (WPF/VSTO) with modern cloud architecture (Azure, Microsoft Graph, SharePoint) within a multi-tenant SaaS delivery model.

Key Responsibilities
1. VSTO Add-In Development & Desktop Engineering
Office Automation: Architect and build advanced VSTO-based add-ins for PowerPoint, Excel, and Word, focusing on custom content libraries, corporate branding/formatting engines, and dynamic document generation.
UI/UX Engineering: Design responsive, rich desktop interfaces using WPF and the MVVM pattern embedded directly within Microsoft Office applications.
Performance & Optimization:



Implement asynchronous programming patterns, efficient memory management, and performance tuning to seamlessly process large datasets and complex presentations.
2. Architecture & Product Design
Modular Architecture: Define scalable, extensible add-in architectures utilizing plugin systems, feature toggles, and shared reusable libraries.
Multi-Tenant Customization: Build agile, configuration-driven behavior per client to support enterprise SaaS delivery while maintaining strict backward compatibility across Office versions.

3. Backend, Cloud & Ecosystem Integration
Cloud Integration: Design RESTful backend services and integrate with Azure infrastructure (App Services, Azure Functions, Blob Storage, Cosmos DB / SQL).
Microsoft Enterprise Ecosystem: Connect add-ins to SharePoint Online, OneDrive, and Microsoft Graph APIs for robust document management, metadata extraction, and enterprise DAM/CRM sy

📌 Senior VSTO Engieer 8+ (India)
🏢 GYSP.tech
📍 India