JPMorgan Chase & Co. Advanced Software Engineering Simulation

Backend transaction-processing system built using Spring Boot, Apache Kafka, REST APIs, H2 Database, Maven, and JPA as part of the JPMorgan Chase & Co. Software Engineering Virtual Experience Program on Forage.

Overview

This project simulates a scalable financial transaction-processing backend system capable of:

• Receiving transactions asynchronously using Apache Kafka
• Validating and processing transactions
• Persisting transaction records using H2 Database + Spring Data JPA
• Integrating with external REST APIs
• Exposing balance APIs through Spring Boot REST Controllers
• Implementing distributed systems concepts and event-driven architecture

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Tech Stack

Backend

• Java 17
• Spring Boot
• Spring Data JPA
• Apache Kafka
• REST APIs
• Maven

Database

• H2 Database

Concepts

• Distributed Systems
• Event-Driven Architecture
• Transaction Processing
• REST Integration
• Asynchronous Messaging
• Fault Tolerance

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Features

Kafka Integration

• Kafka listener consumes transaction events asynchronously
• Topic-based event processing
• JSON transaction deserialization

Transaction Validation

• Validates sender and recipient accounts
• Prevents invalid balance transfers
• Updates balances atomically

Database Integration

• H2 in-memory database integration
• JPA entity persistence
• Transaction record storage

Incentive API Integration

• Consumes external REST incentive service
• Processes incentive rewards for transactions
• Updates recipient balances accordingly

Balance REST API

• GET /balance?userId={id} endpoint
• Returns user balance as JSON
• Default balance handling for invalid users

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Project Structure

src/main/java/com/jpmc/midascore
│
├── entity/
├── foundation/
├── repository/
├── BalanceController.java
├── KafkaTransactionListener.java
└── RestTemplateConfig.java

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How to Run

Clone Repository

git clone https://github.com/karthikrshet/forage-midas-JPMorgan.git
cd forage-midas-JPMorgan

Configure Java

Install:

• Java 17
• Maven

Verify:

java -version
mvn -version

Run Incentive API

cd services
java -jar transaction-incentive-api.jar

Run Application

./mvnw spring-boot:run

Run Tests

./mvnw test

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Key Learnings

• Backend system architecture
• Kafka-based asynchronous processing
• Spring Boot REST API development
• Database integration with JPA
• Distributed systems concepts
• Transaction consistency and validation
• REST service integration

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Certification

Completed through:

• JPMorgan Chase & Co.
• Forage Virtual Experience Program

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Author

Karthik Shet

Software Engineer | Backend & Full Stack Developer

• GitHub: https://github.com/karthikrshet
• LinkedIn: https://linkedin.com/in/karthik-shet-519530257
• Portfolio: https://karthikrshet.github.io/portfolio