Senior Frontend Developer – MS Word Add-in (React / Next.js / Office.js)

Company Description

Zelus India is a specialized recruitment agency offering world-class Staffing, Recruitment, Technology, Consulting, and Outsourcing services to clients globally. With a team of experienced professionals, Zelus provides tailored executive services across diverse industry verticals. The company is driven by a strong commitment to excellence and delivering quality solutions. Zelus is renowned for its expertise in connecting skilled talent with leading organizations worldwide.

Role Description

We are looking for a highly skilled Senior Frontend Developer who has hands-on experience building Microsoft Word Add-ins using Office.js and the Word JavaScript API.

This role requires someone who is a self-starter, works independently with zero handholding, and takes full ownership of design, development, and problem-solving.

You will build intuitive, high-performance UI components using React/Next.js, create advanced Word Add-in functionalities, and integrate deeply with systems like Salesforce.

Key Responsibilities

Build and maintain modern, responsive UIs using React, Next.js, TailwindCSS.

Develop advanced Microsoft Word Add-ins (task panes, ribbons, commands) using Office.js and the Word JavaScript API.

Implement document automation workflows (templating, DOCX, PDF generation).

Integrate Add-ins with Salesforce and other CRMs via REST APIs/OAuth.

Collaborate with design and backend teams to deliver smooth user experiences.

Ensure high performance, clean code architecture, and usability standards.

Troubleshoot complex technical issues independently and propose solutions.

Own end-to-end delivery with minimal supervision.

Required Skills

Frontend:

React.js, Next.js, TypeScript, JavaScript (ES6+)

TailwindCSS, SCSS, HTML5, CSS3

Microsoft Add-ins (Mandatory):

Office.js

Word JavaScript API

Must have built and deployed at least one Word Add-in end to end

Integrations:

Salesforce / Zoho / HubSpot APIs

REST APIs, OAuth2, JWT

Tools & Practices:

Git, Webpack/Vite/Turbopack

CI/CD workflows

Strong debugging and performance optimization skills

Nice to Have

Experience publishing Add-ins to Microsoft AppSource

Understanding of document automation and enterprise workflows

Familiarity with Agile/Scrum

Soft Skills

Self-starter who can work without management or micromanagement

Strong problem-solving and analytical mindset

Eye for clean UI/UX and attention to design detail

Excellent communication and ownership-driven attitude

Mandatory Details :

· Updated CV

· Verified Experience & Skill Fit

· Notice Period / LWD

· CTC Details

· Valid ID for verification