Ke L. Email and Phone Number

In payments, We handle money, from 193 countries over 120+ currencies in billions of dollars every year.

Backend services team. We are in charge of yammer's backend micro services providing searching, ranking, messages, notifications, storage to millions of users each day.We create with vim, SublimeText, IntelliJ, and GitHub; run on Mac and Ubuntu; write Java (Dropwizard), and Ruby on Rails; manage PostgreSQL, HBase, RabbitMQ, Memcache, HAProxy, ElasticSearch, Kafka, Storm, Kibana, and Vertica clusters at scale; and automate using Puppet, Docker, Mesos, Marathon and Azure across physical data center & cloud environments.

Developed a testing framework with Ruby for the latest portable kidney dialysis machine. Used mercurial for version control, Jenkins to facilitate automated testing, Roundup and Review board to enable continuous integration and continuous testing, agile development and fast iteration of the software design and development. The framework is capable of testing the whole system including the UI and FPGA in 3 hours, generating full stack FDA compliant reports, and providing 100% unit test coverage.

Neurology research with the focus on Vestibular Ocular Reflex (VOR) system. Designed and integrated 3D algorithm with real time monitoring and recording system to record and analyze human eye movements. Published 20+ papers in various academic journals.Design, code and deploy the website for Tibet Oral History, an online resource for Tibetan history researchers world wide. This website is now a part of the human heritage project of the United States Library of Congress. The website was written in Java JSP, Javascript and provided the full text search with Apache Lucene and hosted on Apache/Tomcat server, fully documented in Javadoc format and can be distributed using WAR and JAR package.

Developed Chinese Text to Speech version 1.0, the first Chinese TTS system using the diphonia module. Designed and trained the synthesizing system with the expert decision tree algorithm and significantly improved the recognition rate of the synthesized voice.Developed and maintained the data management and training system, which utilized an array of 20 linux machines to process and compute the data and model. Reduced the training time by 50%.Finished the language processing module for automobile embedded system.

Developed search products in vertical search applications that was used by industry leaders like NETEASE.COM, Chinese version of American Online, HUAWEI, the largest telecommunications equipment maker in the world.

Map tool for Free and Honor，china's first real time strategy that was sold for over 2 million copies world wide.Games and apps for English Education channels