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Office Add-In Developer @ R Systems

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 Office Add-In Developer

Job Description

We are looking for an experienced Office Add-in Developer with strong expertise in Office.js to design and build modern, cross-platform add-ins for Microsoft Office applications (Word, Excel, Outlook, PowerPoint). The ideal candidate will have a solid background in JavaScript/TypeScript, web technologies, and Office Add-in architecture with a passion for enhancing Office user experiences.

Key Responsibilities:

  • Design, develop, and deploy Office Add-ins using Office.js, HTML5, CSS3, and JavaScript/TypeScript.
  • Build responsive and intuitive UI panels and task panes that integrate seamlessly with Office apps.
  • Work with Office APIs to manipulate documents, spreadsheets, emails, and presentations.
  • Integrate add-ins with RESTful APIs, Microsoft Graph, and external web services.
  • Collaborate with product managers, designers, and QA teams to define, develop, and deliver features.
  • Ensure compatibility across Office desktop, web (Office Online), and mobile platforms.
  • Manage authentication and authorization flows using Microsoft Identity Platform (MSAL).
  • Follow Microsofts design guidelines and security best practices for Office Add-ins.
  • Troubleshoot issues, optimize performance, and provide technical documentation.

Required Skills & Qualifications:

  • Bachelors degree in Computer Science, Engineering, or related field.
  • 3+ years of experience developing web applications with JavaScript/TypeScript.
  • Hands-on experience with Office.js API and development of Office Add-ins.
  • Proficiency in HTML, CSS, JavaScript, TypeScript, and RESTful API consumption.
  • Familiarity with React, Angular, or other front-end frameworks (React preferred).
  • Understanding of Office Add-in manifest schema, sideloading, and deployment practices.
  • Experience with authentication using MSAL/Azure AD and calling Microsoft Graph API.
  • Knowledge of Microsoft 365 and Office app behaviors across platforms.

Preferred Qualifications:

  • Experience developing add-ins for multiple Office products (e.g., Word, Excel, Outlook).
  • Familiarity with CI/CD pipelines and DevOps practices for Office Add-in deployment.
  • Knowledge of localization, accessibility, and cross-platform UI best practices.
  • Exposure to SharePoint Framework (SPFx) or Teams App development is a plus.

Mandatory Skills - Office.js, JavaScript, TypeScript, HTML5, CSS3


Roles & Responsibilities

  • Design, develop, and deploy Office Add-ins using Office.js, HTML5, CSS3, and JavaScript/TypeScript.
  • Build responsive and intuitive UI panels and task panes that integrate seamlessly with Office apps.
  • Work with Office APIs to manipulate documents, spreadsheets, emails, and presentations.
  • Integrate add-ins with RESTful APIs, Microsoft Graph, and external web services.
  • Collaborate with product managers, designers, and QA teams to define, develop, and deliver features.
  • Ensure compatibility across Office desktop, web (Office Online), and mobile platforms.
  • Manage authentication and authorization flows using Microsoft Identity Platform (MSAL).
  • Follow Microsofts design guidelines and security best practices for Office Add-ins.
  • Troubleshoot issues, optimize performance, and provide technical documentation.

Skills to be evaluated on


Office.js,JavaScript,TypeScript,HTML5,CSS3


Years Of Experience- 5 to 9 Years


Job Classification

Industry: IT Services & Consulting
Functional Area / Department: Engineering - Software & QA
Role Category: Software Development
Role: Software Development - Other
Employement Type: Full time

Contact Details:

Company: R Systems
Location(s): Noida, Gurugram

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Keyskills:   CSS Restfull Api HTML Typescript Javascript Microsoft Graph Graph Api Angular Azure Active Directory office.js MSAL React.Js Sharepoint Framework

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R Systems

About Harbinger Group Harbinger Group is a global provider of software products and services. The Harbinger Group companies are Harbinger Systems and Harbinger Knowledge Products. Harbinger Systems is a leading provider of software engineering services to some of the world's best product compani...