Backend Design

Key Features:

Provides APIs to manage expenses, perform complete analytics, and enable automation through GenAI.
Microservices-based scalable architecture with asynchronous communication using Kafka & Zookeeper.
Designed services and code following enterprise-level standards with well-known design patterns to ensure maintainability and scalability.
Implemented Low-Level Design (LLD) and High-Level Design (HLD) with supporting architecture diagrams.
Created a comprehensive design document with UML diagrams.
Implemented token-based authentication using Spring Security, JWT, and Refresh Tokens.
Applied MVC pattern and Spring Annotations (IoC, Spring Beans) with Lombok, Repositories, Spring Data, and JPA.
GenAI Integration (LLM): Developed a microservice using Flask, LangChain, and Mistral LLM to extract structured expense data from bank-related SMS messages.