JIMMY CHENG

Our product is a restaurant booking system on iOS and browser. I'm in charge of back-end, front-end development and cloud service optimization (web team).

I build a staging environment from scratch with our infrastructure stack, copy data from production (redacted sensitive information), this is for team to doing any testing like stress testing, performance testing, etc., we can also verify data consistency on this environment.

Back-end develop stack:

• Using Node.js, Express.js, Swagger to develop back-end API.
• Using Firebase and PostgreSQL to store data, Redis (Redis Labs) to store global atomic data, and Elasticsearch (Amazon Elasticsearch Service) to store aggregated data for client.
• Using Jasmine for unit testing, CircleCI for CI, Google Kubernetes + Container Registry for CD.
• Using Stackdriver to metric and monitoring server status, data consistency, response time.

As a full-stack developer, I use Node.js, MongoDB, Express.js, React, Redux on daily development. I've in charge for.

I'm involved with projects below:

• Customer service system:
  Using Socket.io to build a total solution for customer and company, include chat room, analysis system, reporting system. I'm in charge of develop chat room feature, include front-end and back-end development.
• Real-time chat system:
  Our goal is to make a service like Twitch. I'm in charge of develop whole website from scratch, include front-end and back-end development.
• Strategy recommendation system in lottery game:
  I'm in charge of develop back-end logic, like lottery drawing calculation, and using Electron to build client-side application.

Develop back-end API, design system architecture, cooperate with front-end and mobile application team.

I'm in charge of:

• Back-end API development:
  Using Golang and MySQL, follow RESTful principle, building highly available service for our website.
• Website crawler development:
  I take responsibility for this project. We need some specific data from other website, so we crawl other website periodically. Using a controller to handle all crawlers which hosted on different server (prevent IP blocking), check data correctness before store to database.
• Develop API for mobile application:
  I take responsibility for this project. To integrate with existing API, I build a middleware to filter the data which only needed by mobile application. We have several cache mechanism for decrease the network throughput.

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

I'm in charge of:

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

Develop front-end and back-end for projects, and also maintained company's hardware and software.

I'm in charge of:

• Build up website infrastructure (like VPS environment setting, DNS, database setting).
• Develop a website by using WordPress (PHP + MySQL), depend on our customer, we customizing the WordPress module, like 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:

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