Billy L.

Billy L.

Full Stack Developer

Request Rate
Hong Kong

Billy is an experienced Full Stack Developer with a large number of successfully completed projects in the computer software industry. He’s been working in web development for more than 4 years. Billy is mainly focused on JavaScript- React and Angular on the front-end and Node.js on the back-end. Most of the projects he worked on are commercial b2b and b2c apps.


  • React
  • Angular
  • CSS
  • Node.js
  • React Native
  • Javascript


Freelance, Remote

Full Stack Developer

August 2015 to Present


  • JavaScript,
  • TypeScript,
  • React,
  • AngularJS,
  • Angular 7,
  • Node.js,
  • Express.js,
  • Bootstrap,
  • Angular Material,
  • PostgreSQL
  • MongoDB,
  • MySQL,
  • Elasticsearch,
  • AWS S3,
  • Python, 
  • Ruby On Rails,
  • Nginx, 
  • REST API, 
  • Parse.

Projects and Responsibilities:

iOS App:

  • Worked as a Mobile Developer and App Tester;
  • Developed iOS client for a Taiwan media and news provider written in Objective-C with custom UI and animation, which is available in the Taiwan App Store.

E-Commerce Website:

  • Worked as a Web Developer and Web Tester;
  • Developed a customer-facing website with a display, order, and payment modules written in Angular 2, along with admin dashboard (CMS);
  • The Backend is written in Ruby On Rails with PostgreSQL as a database.

HRM System:

  • Worked as Web Developer Lead, collaborated with offshore developers;
  • Developed a customized HRM system written in JavaScript and Python, which enables authorized users to create employee profiles, manage contracts, manage timesheets, handle attendances, and manage leaves. 

Programmatic Advertisement Demand Side Platform:

  • Worked as Web Developer Lead, collaborated with offshore developers;
  • Campaign Dashboard Application: JavaScript and MySQL;
  • NodeJS Bidder with compliance of OpenRTB Protocol and Aerospike;
  • NodeJS Bidder deployed with Kubernetes for autoscaling and monitoring performance;
  • Analytic Dashboard created with Elasticsearch, Logstash, and Kibana (ELK) stack.

Logistics Company, Hong Kong


September 2017 to December 2018


  • JavaScript,
  • TypeScript,
  • AngularJS, 
  • NodeJS, 
  • MongoDB, 
  • ElectronJS, 
  • Alibaba Cloud

Project and Responsibilities:

  • Worked as a Project Lead & Web Developer;
  • Implementing Automation Project based on an In-House Software called TIA;
  • Developed AngularJS (1.6) / NodeJS apps with Electron Desktop clients and Cloud Components (Alibaba Cloud), with Parse Server as backend and MongoDB as database;
  • Designed custom solutions for client and internal use to automate daily data gathering, scrapping, processing, analytic reports generation, and customer relationship management.

Artificial Intelligence (AI) Software Company, Hong Kong

Full Stack Developer

September 2016 to August 2017


  • JavaScript,
  • TypeScript,
  • AngularJS, 
  • NodeJS, 
  • Ionic, 
  • AWS.


  • Developing and maintaining company website and live streaming platform;
  • Researching and developing company/client mobile applications based on Ionic;
  • Implementing live streaming applications for clients.


Bachelor of Science in Computer Science, The Chinese University of Hong Kong

September 2013 to June 2017

Hong Kong