Remote Java Full Stack Developer - Kolkata, India

### Professional Projects and Experience

**Email Notification Module for Spring Boot Application:**

As part of a project for a client’s Spring Boot application hosted on a Tomcat web server, I developed a comprehensive email notification module. This module was designed to send automated emails triggered by various system events. I implemented a flexible system that allowed the client to customize email content and manage various notification templates. By integrating with SMTP servers and ensuring secure email delivery, the system became a crucial part of the client’s communication framework. I also incorporated retry mechanisms for email delivery failures, ensuring reliable notification processes.

**Document Management Module for Retail PLM Software:**

I designed and implemented a document management module for a client’s retail Product Lifecycle Management (PLM) software. The client needed a robust solution to upload various types of documents—such as images, specifications, and marketing materials—and link them to specific entities in their PLM system, like products or collections. This module provided an intuitive user interface for document uploading, tagging, and easy retrieval. I worked closely with the client to integrate it seamlessly into their existing workflow, allowing the users to manage and track documents associated with their retail operations effectively.

**Integration Layer for GCP Pub/Sub:**

To facilitate seamless data flow from the client's PLM software to Google Cloud Platform's Pub/Sub system, I developed an integration layer that mapped and transmitted data between the systems. This layer included data transformation logic to ensure that PLM data was correctly formatted before being sent to Pub/Sub for processing by other microservices and systems. The integration ensured real-time data propagation and scalability for the client’s cloud infrastructure, making it easier to manage their operations across multiple platforms.

### Personal Projects

**Real-Time Chat Application with Flutter:**

I built a real-time chat application as a personal project, using **Flutter** for the frontend and **Firebase** for backend services. The app allows users to send and receive messages instantly, providing real-time communication features with minimal latency. I utilized **Firebase Authentication** for secure user sign-in, ensuring that users' credentials were safely stored. The messaging feature leverages **Firebase Cloud Firestore**, where user data, messages, and chat histories are stored. Through this project, I gained valuable experience in creating highly responsive and dynamic user interfaces in Flutter, as well as integrating Firebase services to support real-time interactions.

### Professional Experience

**Cognizant:**

I worked at **Cognizant**, where I was involved in several large-scale enterprise projects. My work at Cognizant allowed me to strengthen my skills in Java, Spring Boot, and system integrations. I contributed to various modules of enterprise-grade applications, focusing on building scalable and high-performing solutions for clients. I regularly collaborated with cross-functional teams to deliver end-to-end solutions.

**Android Developer Intern at Jaan Elaaj:**

As an Android Developer Intern at **Jaan Elaaj**, I played a crucial role in maintaining and developing two Android applications focused on mental health. One of my key contributions was leading the development of the "Psychologic" module of the app. This module used Machine Learning models deployed to **Google Cloud Platform (GCP)** to assess a user’s mental state based on their interactions within the app. It provided insights into the user’s mental well-being, helping them understand and manage their emotional health. My work at Jaan Elaaj gave me hands-on experience with Android development, cloud-based ML services, and user experience design, along with gaining exposure to healthcare tech.

### Challenges Solved

Throughout my career, I have consistently tackled technical challenges by developing innovative solutions. Some of the major challenges I addressed include:

- **Email Notification Reliability**: Ensuring email notifications were sent promptly and reliably, even in the case of temporary failures in communication systems.

- **Document Management and Workflow Integration**: Developing a flexible document management system that worked seamlessly within an existing PLM framework, allowing users to manage and reference documents across multiple entities.

- **Data Integration and Scalability**: Solving complex integration issues by designing a scalable integration layer that reliably moved data from on-premise systems to GCP's Pub/Sub, ensuring smooth data flow across various components.

These challenges helped me develop a deep understanding of enterprise architecture, cloud technologies, and the importance of delivering solutions that are both efficient and easy to maintain.