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Kengsreng Tang

Kengsreng Tang

Lead Software Engineer at Coupa Software

Hayward, California

RubyOnRails/JavaScript Developer

Solutions-focused technical professional with 10+ years of success driving full lifecycle development of state-of-the-art software and web applications across multiple platforms, languages and environments. Well-qualified with advanced skills honed in Ruby on Rails, JavaScript, and MySQL. Solid knowledge and expertise in Agile/SCRUM development, open source technology, database design/management, parallel and object oriented programming. Demonstrate superior coding, testing, and debugging skills; able to rapidly adapt to new technical environments. Thrive in both independent and collaborative work environments.


Languages: Ruby, JRuby, JavaScript, CoffeeScript, Java, C#, PHP, Windev, Python, C, C++

Web: Rails, BackboneJS, KnockoutJS, Restful, JSON,, XML, Jquery, HTML5, CSS, Haml, JqueryMobile, ExtJS, Bootstrap

Databases: MySQL, ElasticSearch, Redis

Tools: EC2, ElasticSearch, Trello (, Respec, Jasmine, Bitbucket, Mercurial (hg), Resque, git, VIM, ElasticIP, Nuntium (, Phusion Passenger, Unicorn, Capistrano, Eclipse, EventMachine, StateMachine, Vagrant, Docker

Servers: Apache, Nginx, IIS

Platforms: EC2, Ubuntu Server, Ubuntu, Mac

Design Patterns: MVC, Factory method, Singleton, Bridge, Composite, Decorator, Façade, Proxy, Command, Iterator, Mediator, Observer, State, Strategy, Template method, Visitor


  • Lead Software Engineer (Coupa Software)
  • Senior Software Engineer (Cisco)
  • Software Engineer (Cisco)
  • Software Developer (IWAYS(
  • Software Developer (InSTEDD)


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