Overview

In many companies, managing client callbacks can become a disorganized and time-consuming process. Teams often rely on manual lists, spreadsheets, or personal reminders — leading to missed follow-ups, inconsistent communication, and lost client engagement opportunities.

To address this issue, I developed Callback Reminder, an internal software tool built to streamline and automate callback management. The goal was to create a system that ensures no client callback is ever missed while giving team members full control and visibility over all pending and completed callbacks.

Problem

Before Callback Reminder, the company faced these challenges:

• Missed callbacks due to poor tracking and scheduling.
• No centralized dashboard to monitor callback statuses.
• Difficulty searching or filtering client details.
• Manual updates and follow-ups that consumed valuable time.

These inefficiencies resulted in lower client satisfaction and disrupted workflow management.

Objective

The objective was to design and develop a lightweight, user-friendly, and secure internal web application that allows company staff to:

• Record and manage client callback details in one place.
• Automatically update missed callbacks to “Pending.”
• Search, filter, and edit callbacks quickly.
• Authenticate securely using an email-based OTP login system.

Solution

The Callback Reminder system was created as a web-based solution with a modern UI, powerful backend logic, and automated scheduling. It integrates client data, callback scheduling, and email-based authentication into one smooth workflow.

The system is built using:

• React and Next.js for dynamic, component-based UI.
• Tailwind CSS for responsive and clean styling.
• PostgreSQL for structured and secure data storage.
• Cron Job automation for handling missed callbacks.
• Email Authentication with OTP to ensure only authorized users can access callback data.

Core Features

Dashboard Management

The dashboard serves as the control center for callback operations. Users can view all callbacks, see upcoming and pending ones, and perform CRUD (Create, Read, Update, Delete) operations with ease.

Callback List & Filtering

Users can view all client callbacks in a detailed table that supports:

• Sorting and filtering by name, phone number, status, date, and time.
• Real-time updates for any status or note changes.
• Editing or deleting callbacks instantly without page reload.

Automatic Status Updates

A cron job runs periodically to check if a callback time has passed.

If a callback was missed, the system automatically updates its status to “Pending” and flags it for review. This eliminates human error and ensures no callback is forgotten.

Notes and Updates

Each callback can include notes, allowing users to record follow-up details or conversation outcomes for future reference.

Secure OTP Email Authentication

To maintain data privacy and ensure secure access, the application implements email-based OTP authentication. Users must verify their identity before logging in, making the system safe for internal company use.

Technical Stack

Layer	Technology Used
Frontend	React, Next.js, Tailwind CSS
Backend	Next.js API Routes, Node.js
Database	PostgreSQL
Automation	Cron Job (Node Scheduler)
Authentication	Email OTP Verification
Hosting	Vercel (Frontend) & Supabase (Database)

Results & Impact

After implementing Callback Reminder, the internal communication and callback process improved significantly:

• 100% callback tracking with automated updates.
• 50% time saved by eliminating manual scheduling.
• Improved data security via OTP-based login.
• Enhanced workflow transparency and accountability.

This project successfully demonstrated how a simple automation system, built with modern web technologies, can transform internal business processes and ensure consistent client communication.

Learning & Takeaways

Through this project, I enhanced my skills in:

• Full-stack development using React and Next.js.
• Database design with PostgreSQL.
• Task automation using cron jobs in Node.js.
• UI/UX design with Tailwind CSS for minimal, responsive layouts.
• Authentication workflows and secure email verification systems.

Conclusion

Callback Reminder is more than just a scheduling app — it’s an efficient internal tool that ensures every client gets the follow-up they deserve.

With its seamless interface, secure authentication, and automated logic, it represents the balance between practical functionality and modern software design.