Designed and scaled a 30+ microservices platform, delivering end-to-end features from design through UAT support. Implemented asynchronous, non-blocking microservices using Reactive Spring (Mono/Flux) and WebClient, boosting responsiveness and resilience. Engineered RESTful APIs and front-end features with Spring Boot and Angular/TypeScript. Led implementation of advanced search using Oracle Text for large-scale datasets. Built batch and streaming data pipelines with Spring Batch and Oracle CDC, achieving 46,000+ records daily. Created reusable libraries and applied design patterns (Factory, Strategy, Adapter, Template Method) to improve modularity. Containerised apps with Docker and Podman, deployed to Kubernetes; monitored with Splunk and Kibana; ensured code quality with 80%+ unit test coverage and SonarQube checks; documented APIs with OpenAPI and PlantUML.

Full Stack Developer at DBS Bank

June 1, 2023 - November 1, 2024

Led cloud-native re-stack of DBS’s internal banking application on AWS, leveraging ECS, VPC, DynamoDB to deliver scalable backend services and Angular-based frontend. Architected and implemented asynchronous microservices using Spring WebClient and Spring Data. Enhanced data manipulation of nested JSON objects for storage in DocDB and/or DynamoDB; contributed to an internal open-source component library enabling dynamic Angular components; implemented data rendering with nested JSON mapping; adopted clean architecture; documented designs with PlantUML and Confluence.

Full Stack Developer at NETS Solutions Pte Ltd

August 1, 2022 - February 1, 2023

Developed full-stack features with Java, Spring Boot, Angular, Node.js and TypeScript; implemented event-driven microservices using Solace in a publish/subscribe architecture; practiced TDD with JUnit; improved data handling and performance for backend services and REST APIs.