wan User

Designed clean Electron APIs to streamline main-renderer communication and built/maintained PINpad- and peripheral-bound APIs for enterprise POS enabling secure card payment transactions.

Built event-driven serverless microservices for geo-location processing, AppSync and REST APIs, and integrated Neptune with Elasticsearch for full-text search.

Built SPAs and PWAs integrated with OIDC, created SSR React templates and maintained a living style guide with Storybook to improve DX and testing workflows.

Delivered React features, migrated testing/tools (Karma->Jest, Flux->Redux), improved developer experience and increased test coverage across the frontend codebase.

Delivered full-stack features and improved DX for in-house widgets and components, and implemented pre-commit checks to enforce linting and test standards.

Performed impact analysis, added error tracking, managed Docker/Jenkins pipelines and maintained scalable AWS environments with quarterly secrets rotation tooling.

Developed and maintained CMS and education systems, implemented data auditing with Splunk and improved system architecture and testing practices.

Developed and maintained a mobile POS system, managed AWS infrastructure with Terraform and automated CI/CD delivery of dockerized applications via Jenkins.

Developed and maintained dealership systems, refactored backend services and implemented unit/integration tests to improve system reliability and feature delivery.

Developed telecommunication management systems and mobile apps, led Network Device Validator development and built reporting frameworks for migration reconciliations.

Developed requisition and resource booking web apps and replaced JDBC architecture with EJB3; implemented Cocoa-Java server for POS device communication.

Developed hospital registration and government construction approval modules and led integration and user acceptance testing processes.

Developed blood donor scheduling and pilot health monitoring modules and implemented PL/SQL algorithms for education ranking reports.

Supported DocuPrint systems, built monitoring daemons and role-based auth framework, and developed document-sharing and collaboration web apps.

Developed and supported reporting and insurance applications and implemented Unix daemons to interface with AS-400 mainframe systems.