Building a Secure Client Portal with Zoho Integration and Large File Uploads

Industry

SaaS

Project Type

Client Portal / Web Application

Services

Web Application

Duration

November 2024 to January 2025

Technology

React.js, Tailwind CSS, Redux, Node.js, Express.js, JWT

01

Project Overview

The client needed a secure client portal for client and staff users, with role-based access, dashboards, messaging, calendar task management, and large file uploads, connected to Zoho for accounts, users, and tasks.

SiGa Systems built the portal with a React frontend and an Express backend, using JWT authentication with role-based access control, direct Zoho API integration , chunked file uploads, and secure admin impersonation for support.

The completed portal manages accounts, users, and tasks through Zoho APIs without a standalone database, supports 1GB+ file uploads, and gives administrators a way to troubleshoot client and staff accounts.

02

Key Results

Secure User Access

The portal uses JWT-based authentication and role-based access control across the React frontend and Express backend to provide controlled user access.

Zoho-Connected Operations

Accounts, users, and tasks are managed through direct Zoho API integration, removing the need for a standalone database within the portal.

Reliable Large File Transfers

A chunked upload strategy enables uploads of files of 1GB and larger, supporting smooth performance and reliability during transfers.

Improved Support and Task Management

Admin impersonation improved support efficiency, while the responsive React interface provides dashboards, messaging, and calendar-based task management for users across devices.

03

The Challenge

Secure Authentication and Access Control

The portal needed secure authentication and fine-grained role-based access, enforced across both the React frontend and the Express backend for different client and staff users.

Large File Uploads

Users needed to upload files of 1GB and larger, which required the portal to deliver reliable performance without degradation or failures during transfers.

Zoho Data Synchronization

Accounts, users, and tasks had to be managed through Zoho APIs, so data needed to be synchronized efficiently without a standalone database in the portal.

Secure Admin Impersonation

Administrators needed to troubleshoot and support client and staff accounts, which required an impersonation capability while maintaining strict security controls.

05

Our Approach

01

JWT and RBAC Authentication

Implemented JWT-based authentication with role-based access control across the React frontend and Express backend to protect data and control access by user role.

02

Direct Zoho API Integration

Integrated directly with Zoho APIs to manage accounts, users, and tasks, which removed the need for a standalone database and supported data synchronization.

03

Chunked File Upload Strategy

Developed a chunked upload strategy for large files of 1GB and larger, enabling smooth performance and reliability throughout the file transfer process.

04

Secure Admin Impersonation

Added secure impersonation functionality that lets admins switch into client and staff accounts for troubleshooting and support without compromising security.

05

Responsive React Interface

Built a React-based interface with dashboards, messaging, and calendar-driven task management, designed to provide a responsive user experience across devices.

06

How the Portal Works

01User Authentication

Users authenticate through JWT-based access controls according to assigned roles.

Accounts, users, and tasks are managed through Zoho API integration.

Users access dashboards and manage tasks through calendar-based workflows.

Large files are transferred using chunked uploads for improved reliability.

Authorized administrators can impersonate client or staff accounts for troubleshooting.

07

Key Features

JWT Authentication & RBAC

Secure authentication using JWT with role-based access control, applied across the React frontend and Express backend for controlled user access.

Zoho API Integration

Manages accounts, users, and tasks directly through Zoho APIs, without relying on a standalone database within the portal.

Large File Uploads

Supports uploads of 1GB and larger files through a chunked upload strategy designed for reliable transfers.

Admin Impersonation

Lets administrators switch into client and staff accounts to troubleshoot issues and provide support while keeping security controls in place.

Dashboards, Messaging & Calendar Tasks

Responsive React interface with dashboards, messaging, and calendar-based task management for use across different devices.

08

Technical Challenge

Authentication and Access Control

Implementing secure authentication and fine-grained role-based access that works consistently across both the frontend and backend layers of the portal.

Large File Transfer

Handling uploads of 1GB and larger without performance degradation or failures during the transfer process.

Zoho API Synchronization

Synchronizing data efficiently with Zoho APIs for accounts, users, and tasks in the absence of a standalone database.

Secure Impersonation

Implementing admin impersonation for troubleshooting while maintaining strict security controls over access to client and staff accounts.

08

Challenges & Solutions

CHALLENGE

SOLUTION

Secure authentication and fine-grained role-based access

JWT-based authentication with RBAC across React and Express

CHALLENGE

SOLUTION

Large file uploads without performance degradation

Chunked upload strategy for 1GB+ file transfers

CHALLENGE

SOLUTION

Data synchronization without a standalone database

Direct Zoho API integration for accounts, users, and tasks

CHALLENGE

SOLUTION

Admin troubleshooting without compromising security

Secure impersonation functionality for client and staff accounts

09

Technology Stack

Frontend

React.js

Tailwind CSS

Redux

Backend

Node.js

Express.js

JWT

10

Results & Impact

Secure Access Control

JWT-based authentication and RBAC give the platform controlled user access, with roles governing what client and staff users can reach.

Centralized Zoho-Connected Operations

Accounts, users, and tasks are handled through Zoho APIs, so the portal operates without a standalone database of its own.

Reliable Large File Handling

The chunked upload strategy allows files of 1GB and larger to be transferred with the reliability the project required.

Improved Support and User Experience

Admin impersonation improved support efficiency, while dashboards, messaging, and calendar-based task management give client and staff users a responsive interface across devices.

11

Conclusion

The client needed a secure portal for client and staff users, with role-based access, Zoho-connected account and task management, large file uploads, admin support tools, and a responsive interface with dashboards and messaging.

SiGa Systems implemented JWT authentication with RBAC across React and Express, direct Zoho API integration, a chunked upload strategy, and secure admin impersonation, alongside a React interface with dashboards, messaging, and calendar-driven task management.

The completed portal, built between November 2024 and January 2025, supports controlled user access, Zoho-managed data, reliable 1GB+ file uploads, and improved support efficiency through admin impersonation and a responsive React interface.

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