All work
ICICI Bank · Banking · 2020 — 2022
High-Volume Payments & Fund Transfers
Multithreaded Java services and Kafka consumers handling onboarding, payments, fund transfers and transaction history for a large retail bank.
Client code · private under NDA
Architecture at a glance
01
Channels
Mobile · Web
02
Transfer API
Spring Boot · RBAC
03
Kafka
payment.initiated
04
Ledger workers
Multithreaded
05
Oracle
Tuned indexes
The challenge
Customer transactions needed to be processed at high volume with strong consistency, security and observability.
Tech stack
Java 8/11
Spring Boot
Spring Data JPA
Hibernate
Apache Kafka
Oracle
Docker
Jenkins
JUnit
What I did
- 01Built Java 8/11 Spring Boot microservices for onboarding, accounts, payments and transfers.
- 02Processed banking events asynchronously with Kafka producers and consumers.
- 03Used Core Java concurrency and Collections for throughput; tuned Oracle queries and indexes.
- 04Created reusable service frameworks, containerised with Docker and deployed via Jenkins.