Kang Chen's Email Addresses & Phone Numbers

📖 Summary

Senior Software Engineer @ Intuit Technical lead for Intuit Community, back-end engineer for next-gen platform, and member of technical staff for LoveALocalBusiness.com From August 2011 to October 2011 (3 months) Menlo Park, CASoftware Engineer Intern @ Intuit Intuit Quicken Health Group From June 2007 to August 2007 (3 months) Senior Engineering Manager @ Coursera Leading content platform engineering on assessments, academic integrity, and grading platform. Mountain View, California, United StatesSoftware Engineering Manager @ Coursera From April 2018 to March 2020 (2 years) Mountain View, CASenior Software Engineer @ Twitter Backend for Syndication and first engineer on Fabric TwitterKit SDK. Initial design to release of production quality iOS SDK without prior mobile experience. Added millions of off-platform MAUs- Native Tweet UI components- Twitter REST API client- Authentication pipeline with transparent guest auth and multi-user support- TwitterKit analytics and metrics dashboards- TwitterKit Unity- Lead engineer for Twitter's first-ever off-platform monetization strategy - https://blog.twitter.com/2016/announcing-a-new-way-to-monetize-your-app-with-twitter-kit-mopub - http://thenextweb.com/apps/2016/05/17/twitter-ads-in-tweets-beta/- Capacity planning for new product launches including building back-pressure mechanisms into SDKs From July 2013 to May 2016 (2 years 11 months) San Francisco Bay AreaSoftware Engineer @ Twitter Help scale infrastructure to support millions of people around the world!- Helped with decentralization and migration efforts off of one of the biggest Ruby on Rails stacks on the planet (Monorail)- Zero-downtime Thrift library upgrade in Monorail for core application services- On-call rotation during heavy peaks e.g. Olympics for Monorail- Part of the founding Syndication team responsible for designing and building the new generation of Twitter for Websites product from grounds up: Embedded Timelines and Embedded Tweets- Core contributor to Syndication platform, implementing various features such as server-side rendering, caching (CDN, Memcache), and data models, business logic, and storage (Scala, Finagle, Thrift, Cassandra, Mesos)- Backend technical lead on Syndication responsible for owning, tuning, and scaling services that peak at 10.5M+ requests/min while maintaining 99.99%+ SLA- Infrastructure managed grew from 20 to 250+ shards across existing and new services- Lead on re-architecting and migrating all Syndication services from bare metal in one datacenter to multi-DC, bi-directionally replicated, internal cloud platform (Mesos, Cassandra)- Implemented internationalization (I18N) support for Embedded Tweets and Embedded Timelines- Implemented deploy scripts (Ruby) for interacting with Jenkins CI and Git to do hundreds of deploys to Mesos and Packer across all Syndication services- Backend technical lead for Embedded Timelines, Embedded Tweets, Tweetbutton, oEmbed API, Twitter Headlines- Optimized Headlines backend performance by 10X through refactoring and JVM tuning- Lead on designing and implementing automated Headline verification feature via URL crawling and Storify integration for Twitter Headlines- Migration from Maven to Pants build tools- Helped grow the Syndication team from 4 engineers to 8 while establishing on-call rotations- Mentor to intern and new engineers on the team From March 2012 to July 2013 (1 year 5 months) San Francisco Bay AreaSoftware Engineer @ Posterous - Member of backend engineering team focusing on scalability of Ruby on Rails stack- Lead engineer in re-architecting asset hosting service leveraging Amazon S3 to provide 100X in performance- Lead engineer in re-architecting user subscription emails system to provide transparent end-to-end tracking with MongoDB- Core contributor to user export tool to help users migrate off the platform during sunsetting- Maintenance of software stack post-acquisition From October 2011 to April 2013 (1 year 7 months) San Francisco Bay AreaSoftware Engineer @ Intuit - Lead engineer on numerous user facing features for Community.intuit.com and LoveALocalbusiness.intuit.com (Ruby on Rails, HTML, CSS, jQuery)- Love A Local Business featured as 1 of 8 funding contests for big ideas on Mashable ( 09/2010 )- Designed and implemented caching strategies that withstood 350+ million requests/week during tax season- Led continuous deployment efforts as we moved away from hours of release call to zero down time deployment- Spearheaded adoption of NoSQL solutions for scalability (MongoDB)- Presented technical presentations to rest of engineering staff on MongoDB and Map/Reduce- Experience in system administrator role tasked with keeping production site up 24/7Designed and implemented first iteration of RESTful API for Community- Key contributor to 3 data center migrations, including 2 with high availability setups. Work included cross data center deployment recipes, data store replication, load testing, and server setup- MySQL real-time replication for offline analytics- Lead engineer in design and implementation of real-time user gaming system toincentivize engagement on Community that is similar to Badgeville and Foursquare- Lead engineer in site activity feed leveraging NoSQL storage (MongoDB), 60+ million requests/week. Deliverable resulted in 300% improvement in time to first response within 15 minutes in the first 2 months- Implemented database models, location-aware suggestion algorithm, caching strategies, front-end, integration with Facebook and Twitter for LoveaLocalBusiness.Intuit.com- Overhauled old deployment system to be fully automated. Spearheaded continuous deployment efforts resulting in elimination of release calls and downtime. Deployment time decreased from 2 hours to 2 minutes. Same system is being used to deploy over 3,000 times in staging- Lead engineer on new Intuit Small Business Blog built on Wordpress From November 2008 to August 2011 (2 years 10 months) Menlo Park, CAQA Software Engineer Intern @ Intuit Internship with Intuit's Quickbooks QA team.Projects:- Researched various mocking libraries for whitebox testing. Presented results to engineering community.- Co-authored web-based dynamic SQL query tool. Designed and implemented UI in HTML, CSS, and Javascript From June 2008 to August 2008 (3 months) Staff Software Engineer @ Coursera Providing universal access to the world's best education From June 2016 to April 2018 (1 year 11 months) San Francisco Bay Area