JIMMY CHENG

• AWS Stack: API Gateway, Lambda, CloudFront, Certificate Manager, DynamoDB
• Node.js

• Provide a booking management system for Food and Beverage service
• Provide good quality products which serve to 4+ countries in Asia, avg. 38K reservations created per day in 2019
• Work with remote team member located in New York
• Create Customer Service Guideline, planning how to handle customer service
• Planning API implementation guideline for develop team, separate single controller into several layers in API

• Build a staging environment with our infrastructure stack
• Integrate with Loader.io for the purpose of testing like stress testing, performance testing
• Integrate with CircleCI, make performance testing as one of our CI/CD pipeline
• Planning near-production data cloning and generating in this environment

• Gathering data from client (iOS App) and server, compare the difference to determine the synchronization status
• Measure latency between client and all cloud services, visualize in Kibana, populate data to Stackdriver and setup alert
• Determine the bottleneck, keep optimize our service

• Maintain and handle the current billing process
• Planning a new billing system and accounting system, automate manual works including calculations, payment and invoicing, handling complicate pricing model

• Use Node.js, Express.js, Gulp.js, React, Redux, Pug, MongoDB, Redis
• I'm in charge of back-end and front-end development

• Customer service system
  • Front-end and back-end development for the chat room, analysis system, reporting system
  • Using Socket.io to communicate with client and server
• Real-time chat system
  • Front-end and back-end development for the landing page, admin dashboard, chat room
  • Using Socket.io to communicate with client and server
• Recommendation system in lottery game
  • Back-end develop for gaming logic implementation, lottery drawing calculation
  • Integrate with lottery website
  • Using Electron to build client-side application

• Focus on back-end, involved some infrastructure
• Cooperate with front-end team and mobile application team

• Back-end API
  • Develop/maintain API and internal library
  • Optimize MySQL query
• Crawler service
  • Crawl target website periodically with task manager
  • Control service with multiple Cloud Service Provider, prevent crawler from being blocked
  • Implement crawler logic, fit all lottery game across the world
  • Implement data validation, prevent fake result from spam website
  • Implement a simple failover mechanism
• API for iOS and Android App
  • Middleware between API and App
  • Optimize response data content, decrease network throughput
  • Implement API version control
  • Implement App version control, can do live update for App, even rollback without submitting to App Store

• Using Golang for back-end API development and front-end server-side
• Using MySQL to store data, handling huge data by using index and partition
• Using Gulp.js to do the batch task

Managed the progress of projects, contact with customers to help engineers and designers to fully understand what customer needs

I'm in charge of:

• Project management
• Customer development
• System analysis and design
• Establish the sales kit

Developed front-end and back-end for all projects

I'm in charge of:

• Build up website infrastructure (like VPS environment setting, DNS, database setting)
• Develop a website by using WordPress (PHP + MySQL), we customized the WordPress module, including administrator dashboard, membership level system, email system, online shop, crowdfunding platform ... etc
• Design website layout and make it work perfectly by using HTML, CSS, JavaScript
• Develop payment gateway plugin for WooCommerce (AllPay, PayPal, ECPay, Pay2GO, Spagateway ...)
• MySQL database tuning, SEO optimization

Assist in the development of projects

What I've done in this position:

• Developed Joomla's payment gateway API, using T-CAT (統一客樂得) Payment
• Developed WordPress plugin like Facebook LikeBox, Facebook Fan Page Album Transmitter ... etc