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Surabhi Subbanarasimha

@surabhisubbanarasimh

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Lead Full Stack Developer at Fiserv, replatforming fraud detection systems to cloud-native microservices.

United States

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At Fiserv, I replatformed transaction processing systems in the Fraud Detection domain to cloud-native microservices and developed Java and Spring Boot services for real-time financial transactions. I also built ReactJS and TypeScript features for fraud monitoring dashboards and agent workflows.

At Service New South Wales, I digitized the Driver Knowledge Test transaction and replatformed online services including Renew Registration and Licence Renewal. I developed Kotlin and Spring Boot microservices integrated with Apigee proxies, and deployed services to AWS through the TAS platform.

Earlier, I worked on Core Payments Gateway services at Mastercard and helped move Capital One Java applications to AWS. Across these projects, I’ve developed RESTful services, used Kafka for asynchronous communication, and applied JUnit and Mockito for testing.

Experience

Work history, roles, and key accomplishments

Lead Full Stack Developer

Fiserv

Mar 2026 - Oct 2026 (7 months)

Replatformed legacy transaction processing systems to cloud-native microservices within the Fraud Detection domain. Developed microservices using Java and Spring Boot, integrated Kafka for asynchronous communication, and built full-stack features with ReactJS and TypeScript.

Spring Boot Kotlin MySQL RESTful Web Services TAs Apigee React TypeScript Swagger OpenAPI Kafka Junit Mockito Playwright Java

Senior Software Engineer

Commonwealth Bank of Australia

May 2025 - Feb 2026 (9 months)

Contributed to the Engineering Excellence team focused on uplifting development standards and code quality across enterprise Java microservices. Designed and developed scalable microservices using Java and Spring Boot, implemented event-driven architecture with Kafka, and deployed containerized applications using Docker and Kubernetes.

Spring Boot Kotlin MySQL RESTful Web Services TAs Apigee React TypeScript Swagger OpenAPI Kafka Redis Docker Kubernetes AWS Splunk Prometheus Grafana Java

Senior Software Engineer

Service New South Wales

Jun 2020 - May 2025 (4 years 11 months)

Digitized the Driver Knowledge Test transaction and replatformed multiple online transactions within the digital space. Developed microservices using Kotlin and Spring Boot, integrated Kafka for asynchronous communication, and deployed to AWS cloud using the TAS platform.

Spring Boot Kotlin MySQL RESTful Web Services TAs Apigee React TypeScript Swagger OpenAPI Kafka AWS Junit Mockito Git Jira Maven Gradle IntelliJ IDEA

Java Developer

Mastercard

Aug 2019 - Mar 2020 (7 months)

Involved in analysis, design, development, and maintenance of a suite of applications on Core Java technology for the Core Payments Gateway team. Worked on RESTful web services extensively and used Maven as the build tool.

Core Java Spring Boot JDK Junit Mockito Git Jira RESTful Web Services Apache Tomcat IntelliJ IDEA Maven STASH Kibana

Java/AWS Developer

Wipro

Jun 2019 - Aug 2019 (2 months)

Involved in analysis, design, enhancements, and maintenance of the PTIPS application on Java/J2EE and AWS technologies. Focused on helping with the transition of the application to the cloud and delivering enhancements.

Core Java Spring Boot JDK Junit Mockito Git Jira RESTful Web Services Apache Tomcat IntelliJ IDEA Maven STASH Kibana AWS

Java/AWS Developer

Capital One

May 2018 - May 2019 (1 year)

Involved in analysis, design, development, and testing of applications on Java/J2EE technologies using Amazon Web Services (AWS) SDK and Spark SQL. Helped migrate data from legacy environments to a data lake on AWS S3.

Core Java Spring Boot JDK Spark AWS Junit Mockito Git Jira S3 RESTful Web Services Apache Tomcat IntelliJ IDEA Maven EC2 EMR Lambda AWS SDK

Java/J2EE Developer

Tata Consultancy Services

Feb 2013 - Feb 2014 (1 year)

Involved in requirement analysis, functional specifications, and overall component design for an online merchandise web application. Developed web applications using Spring Framework, Hibernate, Web services, and JMS message transports.