John Elmer

- Migrate the system from dependency with the old system (Midazpay) to independence with the current system - Integrate with multiple payment gateways with Strategy Pattern - Build Save Now, Buy Later feature - Build a social media-like feedback feature containing reactions, comments, and replies. - Build a Save Deposit feature - Build exciting features of the Whiz app using Typescript as a programming language in the back end with NodeJS/Express and the front end with React Native.

- Re-write GajiGesa backend from Django to NodeJS, TypeScript, NestJS, and microservice architecture. - Re-structure Open API from integration with Django to NodeJS - Re-write GajiTim backend from Django to NodeJS, TypeScript, NestJS - Develop and maintain bill payment microservice using NodeJS, ExpressJS, TypeScript, and KnexJS - Develop and maintain Open API backend service using NodeJS and ExpressJS - Develop and maintain GajiTim backend service

Making life better through on-demand beauty and wellness services. - Developing Backend system, API, and Report Generation Tools using Python, Django, PostgreSQL, HTML, and CSS - Developing Mobile Apps on Android and iOS using Android Studio, Java, Kotlin, XCode, Swift, and Realm mobile database - Managing Junior Software Developers - Helping the operational team to minimize decision options through Data Analytics

Making life better through on-demand beauty and wellness services. - Developing Backend system, API, and Report Generation Tools using Python, Django, PostgreSQL, HTML, and CSS - Developing Mobile Apps on Android and iOS using Android Studio, Java, Kotlin, XCode, Swift, and Realm mobile database

Build web-based program called "SalesProspect" using CodeIgniter as a Framework for Sales Department to list prospect client for each sales employee