Web Developer


Web Developer


Full Name

鄭景仁 / Chin-Jen Cheng


January 6, 1990




中文, English



3F, No.378, Nanxiang Rd.,

Luzhu District,

Taoyuan City, Taiwan, 33854


+886 931 077 193


4 years' experience as a web developer across front-end, back-end and some infrastructure. I can communicate and cooperate with others clearly, and I know how to adjust my pace of work in the different growth stage of the company.

For more works I've done please visit my portfolio: jimmmmy.com/portfolio



HTML, CSS, JavaScript

  • 4 years experience
  • Familiar with HTML, CSS and more than 30 projects launched on production environment
  • ES6, Object-Oriented JavaScript

[Framework] React, Redux

  • 1 year experience
  • Have 3 projects launched on production environment with React and Redux

[CSS preprocessor] Sass, Stylus

  • 1 year experience
  • Have 1 projects launched on production environment with Sass and 3 for Stylus



  • 1 year experience
  • Have 5 projects launched on production environment
  • Develop API with Express, Swagger
  • Write unit test with Jasmine, Mocha


  • 1 year experience
  • Have 4 projects launched on production environment
  • Have 2 side projects on GitHub


  • 2 years experience and most of time was using WordPress to develop themes and plugins, more than 10 projects launched on production environment


  • CRUD
  • Indexing, partition

[NoSQL] MongoDB, Firebase

  • CRUD
  • Take benefit from Firebase to deal with real-time event by cloud trigger



  • Setting up environment by using Docker Compose

Google Cloud Platform

  • Handle cluster services by using Kubernetes Engine
  • Deploy services with Kubernetes and Docker
  • Handle event trigger by using Cloud Functions with Firebase


Sep.2018 ~ Now

工程師 / Engineer

工程師 / EngineerSep.2018 ~ Now

Our product is a restaurant reservation system. I'm in charge of back-end development for new features and cloud system optimization, using Node.js, Firebase, Docker, Kubernetes. Also doing front-end work by using React and Redux.

Dec.2017 ~ Aug.2018

工程師 / Engineer

工程師 / EngineerDec.2017 ~ Aug.2018

Outsourcing company. As a full-stack developer, I use Node.js, MongoDB, Express, React, Redux to deal with projects 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 the company, include chat room, analysis system, reporting system. I'm in charge of develop chat room feature, include front-end and back-end.
  • Real-time chat system:
    Our goal is to make a Twitch-like website. I'm in charge of develop whole website from scratch, include front-end and back-end.
  • Strategy recommendation system in lottery game:
    I'm in charge of develop back-end logic, like lottery drawing calculation, and using Electron to build up client-side application.

Oct.2016 ~ Dec.2017

後端工程師 / Back-end Developer

後端工程師 / Back-end DeveloperOct.2016 ~ Dec.2017

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'm project owner 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'm project owner 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 transmission cost.

Mar.2016 ~ Sep.2016

專案經理 / Project Manager

@FLiPER Creative Inc. (Taiwan)

專案經理 / Project ManagerMar.2016 ~ Sep.2016

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.

Mar.2015 ~ Sep.2016

工程師 / Engineer

工程師 / EngineerMar.2015 ~ Sep.2016

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.

Nov.2014 ~ Mar.2015

工程實習生 / Engineer Internship

工程實習生 / Engineer InternshipNov.2014 ~ Mar.2015

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.


Sep.2012 ~ Jan.2014

銘傳大學 / Ming Chuan University

銘傳大學 / Ming Chuan UniversitySep.2012 ~ Jan.2014

資訊工程研究所 / Institute of CSIE

Sep.2008 ~ Jun.2012

銘傳大學 / Ming Chuan University

銘傳大學 / Ming Chuan UniversitySep.2008 ~ Jun.2012

資訊工程系 / Department of CSIE