Backend Developer (Lead) – Siebel Integration

Winzons; India; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

Workplace in Bangalore, India seeks a Backend Developer Lead with 7+ years of experience to drive backend development and system integrations. You will lead efforts on Node.js/TypeScript, Siebel REST APIs, and Microsoft 365 integrations.

You will design scalable REST and event-driven architectures, implement secure OAuth 2.0 with Microsoft Entra ID, and build robust write-back synchronization between Siebel and Microsoft Graph APIs. This is a full-time on-site role.

Qualifications

• Bachelor's degree in CS/IT/Engineering or related field.
• 7+ years of backend development experience.
• Strong experience with Node.js and TypeScript.

Responsibilities

• Lead backend development and integration initiatives using Node.js and TypeScript.
• Design, develop, and maintain integrations between Siebel CRM, Microsoft 365, and external systems.
• Build scalable REST API and event-driven integration solutions.
• Develop and support Outlook Add-ins and Microsoft 365 integrations.
• Implement secure authentication and authorization using OAuth 2.0 and Microsoft Entra ID.
• Design configurable write-back frameworks and synchronization services between Siebel and Microsoft Graph APIs.

Skills

Node.js

TypeScript

Siebel REST APIs

Siebel data model

OAuth 2.0

Microsoft Graph API

REST APIs

Event-driven API

Microsoft Entra ID

Webhooks

Education

Bachelor's Degree in Computer Science / IT / Engineering

Tools

Siebel CRM

Microsoft Graph

OAuth 2.0 libraries

Job description

Company Name: Workplace

Job Role: Backend Developer Lead

Experience Required: 7+ Years

Employment Type: Full-Time

Location: Bangalore, India

Qualification: Bachelor's Degree in Computer Science, Information Technology, Engineering, or a related field

Industry: Information Technology / Enterprise Applications

Key Responsibilities

• Lead backend development and integration initiatives using Node.js and TypeScript.
• Design, develop, and maintain integrations between Siebel CRM, Microsoft 365, and external systems.
• Build scalable REST API and event-driven integration solutions.
• Develop and support Outlook Add-ins and Microsoft 365 integrations.
• Implement secure authentication and authorization using OAuth 2.0 and Microsoft Entra ID.
• Design configurable write-back frameworks and synchronization services between Siebel and Microsoft Graph APIs.

Required Skills

• Strong hands‑on experience with Node.js and TypeScript.
• Expertise in Siebel REST APIs and Siebel data model.
• Good understanding of Siebel Business Objects: Contacts, Activities, Opportunities, and Service Requests.
• Experience with API integration patterns (REST APIs, webhooks, event-driven architecture).
• Hands‑on experience with Microsoft Graph API (Mail, Calendar, People).
• Experience with Microsoft Graph Tasks API, including task creation, updates, completion, webhook subscriptions, and extended property storage.
• Experience with Siebel Business Component REST APIs for create, update, delete operations, and error handling/mapping.
• Strong understanding of OAuth 2.0, token flows, and Microsoft Entra ID.

Preferred

• Experience in enterprise CRM integrations and workflow automation.
• Strong problem-solving, design, and technical leadership skills.