Experience: 7+ Years Compensation: Up to 35 LPA Job Summary We are seeking an experienced Backend Lead with strong expertise in Node.js, TypeScript, and Siebel integrations. The ideal candidate will lead the design and development of enterprise-grade integration services connecting Microsoft 365, Microsoft Graph, and Siebel CRM platforms. This role requires deep knowledge of Siebel REST APIs, Siebel business objects, authentication frameworks, and scalable API architectures. Requirements 7+ years of backend development experience. Strong expertise in Node.js and TypeScript. Hands-on experience with Siebel REST APIs and Siebel data models. Deep understanding of Siebel business objects, including Contacts, Activities, Opportunities, and Service Requests. Experience designing and implementing REST and event-driven integrations. Experience with Microsoft 365 development models and Outlook Add-ins. Strong knowledge of OAuth 2.0, Microsoft Entra ID, and secure token flows. Experience with Mi...