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@wanuser
Senior full‑stack JavaScript engineer specializing in serverless and frontend systems.
I am a senior full‑stack JavaScript engineer with broad experience building serverless microservices, SPAs, PWAs and enterprise POS systems using modern cloud and frontend technologies.
I have designed clean APIs, maintained PINpad and peripheral integrations for POS, and delivered event‑driven serverless architectures processing geolocation and search data; I consistently improved developer experience with Storybook, testing automation and CI/CD.
I work with AWS, Node.js, Typescript and React ecosystems, practice Kanban/BDD/UXDD, and focus on reliable, testable, and maintainable systems that enable parallel development and scalable delivery.
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Work history, roles, and key accomplishments
Australia Post
Nov 2021 - Nov 2025 (4 years)
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.
Versent
Aug 2019 - Oct 2021 (2 years 2 months)
Built event-driven serverless microservices for geo-location processing, AppSync and REST APIs, and integrated Neptune with Elasticsearch for full-text search.
Versent
Aug 2019 - Oct 2021 (2 years 2 months)
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.
Origin Energy
Oct 2017 - Jul 2018 (9 months)
Delivered full-stack features and improved DX for in-house widgets and components, and implemented pre-commit checks to enforce linting and test standards.
Impos Point of Sale
Jul 2015 - Oct 2016 (1 year 3 months)
Developed and maintained a mobile POS system, managed AWS infrastructure with Terraform and automated CI/CD delivery of dockerized applications via Jenkins.
DonRiver Inc.
Jun 2008 - Sep 2011 (3 years 3 months)
Developed telecommunication management systems and mobile apps, led Network Device Validator development and built reporting frameworks for migration reconciliations.
Ecquaria
Apr 2005 - Mar 2006 (11 months)
Developed hospital registration and government construction approval modules and led integration and user acceptance testing processes.
Singapore Computer Systems
Feb 2004 - Mar 2005 (1 year 1 month)
Developed blood donor scheduling and pilot health monitoring modules and implemented PL/SQL algorithms for education ranking reports.
AIA Co.
Feb 2000 - Jan 2001 (11 months)
Developed and supported reporting and insurance applications and implemented Unix daemons to interface with AS-400 mainframe systems.
Degrees, certifications, and relevant coursework
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Software and tools used professionally
MirageJS
Splunk
GitHub
GitLab
Spring Cloud
Jenkins
GitLab CI
MySQL
PostgreSQL
MongoDB
SQLite
CouchDB
Sybase
IndexedDB
Grails
Bower
Material-UI
pre-commit
Terraform
Xcode
Jira
Gradle
Java 8
SinonJS
AngularJS
React Query
Lerna
Webpack
JavaScript
HTML5
Java
ES6
JSON
Objective-C
Neptune
RabbitMQ
ExpressJS
Restify
Linux
iOS
GraphQL
Oracle PL/SQL
Elasticsearch
AWS Lambda
Serverless
XState
JUnit
Chakra UI
JBoss
dockerized
EJB3
SQL
npm
TeamCity
Playwright
You can contact wan and 90k+ other talented remote workers on Himalayas.
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