Image of Yun Li

Yun Li

Full Stack Tech Lead / SDE III, Push Service and Infrastructure

Tech Lead / Full Stack SDE III, Push Service and Infrastructure at Groupon

Greater Seattle Area

Yun Li's Work Experience

Groupon

Full Stack Tech Lead / SDE III, Push Service and Infrastructure

Greater Seattle Area

Microsoft

Software Development Engineer II

February 2012 to January 2015

Redmond WA 98052

Cisco Systems, Inc

Software Engineer

July 2010 to February 2012

San Jose, CA

Yun Li's Education

High School of Northwest University

High School of Northwest University

Michigan State University

PhD, Electrical & Computer Engineering, 3.9/4.0

2007 to 2010

Yun Li's Professional Skills Radar Chart

Based on our findings, Yun Li is ...

Sociable
Calm under pressure
Persuasive

What's on Yun Li's mind?

Based on our findings, Yun Li is ...

50% Left Brained
50% Right Brained

Yun Li's Estimated Salary Range

About Yun Li's Current Company

Groupon

- Program Languages: Scala, Coffeescript, Clojure, Java, GoLang- Big Data Pipeline: Spark, Storm, Kafka, MapReduce- NoSQL Database: Cassandra, Redis, MongoDB- Platform and Lib: Node.js, Martini, ExpressParticipated/Led engineering works in:1) Recommendation Service (aka. Behavior Targeting Service)- Built & Led the development of multiple BTS features using statistical learning models based on user-behavior data- Techs: Coffeescript, Scala, Node.js, Spark,...

Frequently Asked Questions about Yun Li

What company does Yun Li work for?

Yun Li works for Groupon


What is Yun Li's role at Groupon?

Yun Li is Full Stack Tech Lead / SDE III, Push Service and Infrastructure


What is Yun Li's personal email address?

Yun Li's personal email addresses are m****[email protected], and m****[email protected]


What is Yun Li's business email address?

Yun Li's business email address is y*****@microsoft.com


What is Yun Li's Phone Number?

Yun Li's phone (**) *** *** 147


What industry does Yun Li work in?

Yun Li works in the Computer Software industry.


About Yun Li

📖 Summary

Full Stack Tech Lead / SDE III, Push Service and Infrastructure @ Groupon - Program Languages: Scala, Coffeescript, Clojure, Java, GoLang- Big Data Pipeline: Spark, Storm, Kafka, MapReduce- NoSQL Database: Cassandra, Redis, MongoDB- Platform and Lib: Node.js, Martini, ExpressParticipated/Led engineering works in:1) Recommendation Service (aka. Behavior Targeting Service)- Built & Led the development of multiple BTS features using statistical learning models based on user-behavior data- Techs: Coffeescript, Scala, Node.js, Spark, Storm, Yarn, Cassandra, Redis2) Cadence-Arbitration Service(CAS)- Led the development of CAS as a centralized real-time service to determine "when" to send "what" email/push-notification to "whom"- Techs: GoLang, Scala, Martini, Spark, MLlib, Yarn, Cassandra, Redis3) Customer Data Infrastructure(CDI)- Led the development of CDI to meet data access requirements for both real-time services and large scale batch jobs from data scientist team- Techs: Scala, Java, Spark, Yarn, MapReduce, Cassandra4) Cadence Model Implementation- Built Cadence Model & tools to automate Cadence Score generation- Techs: Java, Scala, Hive5) Relevance engine & collaborative-filtering model based on user behaviors- Techs: Scala, Spark, Akka, Redis, Cassandra, Coffeescript, Node.js6) Real-time Reporting for real-time services in Push-Platform- Techs: Spark, Storm, Kafka, Cassandra, Redis7) Mentoring junior developers Greater Seattle AreaSoftware Development Engineer II @ Microsoft • Designed and implemented SQL Azure’s deployment flight control automation system.• Designed and implemented de-componentization model of SQL Azure codebase. This model aims at decoupling one centralized SQL Azure codebase into multiple self-maintainable, self-buildable and self-deployeable codebases, so that the efficiency for building and deployment got improved.• Designed and developed software for upgrading SQL Azure platform. This upgrading aims at upgrade SQL Azure’s data storage structure from Silos to Physical based databases.• Designed and implemented monitoring system for SQL Azure platform. The system is responsible for collecting information for every SQL Azure clusters/databases for health monitoring and analysis.• Designed and implemented build and validation system for SQL Azure codebase. This system includes converting the build system from NTBuild to MSBuild, implementing the Pre-Checkin building-based validation system, implementing Pre-Checkin rules for TFS file system, etc. From February 2012 to January 2015 (3 years) Redmond WA 98052Software Engineer @ Cisco Systems, Inc Network Operating System Technology Group(NOSTG); • Designed and developed Syslog feature for the Data Center Ethernet (DCE) image of Cisco Nexus N7000 series Data Center Switches. The Syslog module is responsible for processing messages received from clients or processes and forwarding these messages to console, log file, line card or other destinations.• Designed and developed Access Control List (ACL) for the Data Center Ethernet (DCE) image of Cisco Nexus N7000 series Data Center Switches. This ACL module aims at traffic shaping and congestion control. From July 2010 to February 2012 (1 year 8 months) San Jose, CASoftware Development Engineer & Research Assistant @ Michigan State University Parallel Computing• Developed a parallel algorithm for large-scale Laplace´s equation computation.• Achieved distributed memory parallelization and asynchronous communication MPI calls.• Reduced the time complexity of the traditional algorithm from O(N^3) to O(NlogN).• These techniques can be applied to Parallel Computing and Multi-thread programming.Dynamic Routing-based Source Protection Protocols Development for Mobile Networks• Coded network & MAC layer routing protocols (C/C++).• Integrated the protocols into TCP/IP-based mobile networking system.• Developed mathematical performance evaluation models for proposed schemes.• These techniques can be applied to developing software applications and network protocols.Efficient and Scalable Authentication & Anonymous Protocols Development for Mobile Networks• Implemented protocols in ns-2 (C/C++ & TCL under Linux).• Enhanced communication & computation efficiency by at least 50%.• Led in a 5-person group. Prioritized tasks. Coordinated among team members.• These techniques can be applied to developing software applications, authentication protocols, & encryption schemes. From August 2007 to May 2010 (2 years 10 months) East Lansing, MIResearch Assistant @ Xidian University • Designed hardware architecture for ‘HiNOC Switch and Bridge system’, with MPC8260 as CPU/VxWorks as OS.• Designed high-speed Physical & MAC layers.• Developed BSP for the system, including Physical & MAC layer drivers (C/C++). From November 2004 to May 2007 (2 years 7 months) Xi'an China


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In a nutshell

Yun Li's Personality Type

Extraversion (E), Intuition (N), Feeling (F), Judging (J)

Average Tenure

2 year(s), 6 month(s)

Yun Li's Willingness to Change Jobs

Unlikely

Likely

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Yun Li's Social Media Links

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