Software Engineer @ Contributing my little power to making world-class education accessible to everyone. Currently working for the Monetization team, focused in building payment system. Check out our products if you would like to get certified: https://www.coursera.org/signature https://www.coursera.org/specializations From November 2014 to Present (1 year 2 months) Senior Software Engineer / Software Engineer @ Worked for the Monetization team, building billing and payment systems. Main projects: - WorldPay: integration of the WorldPay payment gateway as an additional processor for higher payment availability, designed generic API's to streamline new payment processor additions - iOS Recurring Subscription: auto-renewable premium subscription in-app purchase in the flagship LinkedIn iOS app - Dinero: offline payment system handling all transactions from offline sales channel ($50M+/m) - Wallet: saving credit cards, PayPal or future payment instruments in a wallet for convenient subsequent purchases, in a PCI-compliant manner - Multi-colo & QEI readiness: helped making the payment systems multi data centers ready, including migration of RPC services to RESTful, and queue routing based on developer's profile From July 2012 to November 2014 (2 years 5 months) Research Assistant / Teaching Assistant @ - developed a web based microblog search and discovery system, using topic models based algorithms for tweets filtering, classification, and communities discovery - researched state-of-the-art statistical models for improving search over Twitter data - writer-independent online cursive handwriting recognition using Hidden Markov Models at National Center for Supercomputing Applications (NCSA) - TA for CS 125, Introduction to Computer Science. The course is about using Java to learn CS fundamentals, OOP and basic algorithms. Held discussion and lab sessions, graded homework and exams From August 2010 to May 2012 (1 year 10 months) Urbana-Champaign, Illinois AreaSoftware Engineer Intern @ Independently developed a new monitoring web service of CloudWatch, for both internal and external uses. Created highly customizable graphing API's. From May 2011 to August 2011 (4 months) Greater Seattle AreaSoftware Engineer Intern @ Participated in the development and globalization of open-source JavaScript library Dojo, including widgets design and implementation. From July 2009 to December 2009 (6 months)

Master, Computer Science @ University of Illinois at Urbana-Champaign From 2010 to 2012 Bachelor, Computer Science @ East China Normal University From 2006 to 2010 Zhijin Li is skilled in: Java, JavaScript, PHP, C, C++, Machine Learning in Information Retrieval and Data Mining, Dojo, Data Mining, Software Development, OOP, Programming, Algorithms, CSS, Software Engineering, Distributed Systems, Machine Learning, Python, Information Retrieval