Yanfei Wang

Software Engineer

San Francisco, California, United States19 yrs 6 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Expert in building distributed systems and microservices.
Led cross-functional teams on critical Netflix projects.
Strong background in machine learning and data engineering.

Stackforce AI infers this person is a Backend-heavy Fullstack Engineer in the Streaming and Advertising industries.

Contact

Skills

Core Skills

Distributed SystemsMicroservicesMachine LearningData EngineeringReal-time BiddingBig Data

Other Skills

Amazon S3NOSQLSpring BootSQLHIVEJavaAdvertisinggRPCCassandraMemcachedApache FlinkApache KafkaScalaHadoopExtract, Transform, Load (ETL)

About

High Agency Technical Leader with extensive distributed system experience, strong technical foundation/ ML knowledge/data engineering skill sets to build technical solutions for different business needs, and extensive background in the following competencies: Big Picture Thinking Influence Without Authority Lead From The Front Ambiguity Navigation High Level System Design Collaborative Partnership

Experience

19 yrs 6 mos

Total Experience

3 yrs 3 mos

Average Tenure

7 yrs 4 mos

Current Experience

Netflix

Senior Software Engineer

Jan 2019 – Present · 7 yrs 4 mos · Los Gatos, California · On-site

Designed, built and maintained multiple highly scale distributed micro services to
1. Stream ingest telemetry data fired by Netflix Stream Clients, sessionize, summarize, and enrich the playback sessions.
2. Derive the latest bookmark data from the keep-alive telemetry data , persist the bookmark to
distributed KV in memory cache to power the continue watch feature.
3. Update and persist members' all time viewing history based on the summarized session to
Cassandra/KV in memory cache, the VH data was the primary data set for all the ML data needs
within Netflix.
4. publish the detailed summarized sessions to offline data storage as the primary data set to power
Netflix internal business insight/metrics.
Played a critical role driving one of Company top 3 priorities of 2022 "Profile Transfer Feature" by working with 20+ teams cross org and connecting the dots throughout the end to end data life cycle.
Designed, built and maintained ads impression tracking pipeline to support another company top3 priorities: Netflix new ads initiative.

Machine LearningAmazon S3NOSQLSpring BootSQLHIVE+9

Criteo

Senior Software Engineer

May 2017 – Jan 2019 · 1 yr 8 mos · San Francisco Bay Area

Own datapipeline of Search, move/aggregate ads data from HDFS to Vertica for visualization
Graduate from 3-months full time Machine Learnng Boot Camp program, deliver GBDT model to production, win the best poster award
Design and delvelop prospecting data pipeline generating fisher vector as input of DNN model

Machine LearningScalaHadoopSQLExtract, Transform, Load (ETL)HIVE+4

Turn

2 roles

Senior Software Engineer

Promoted

Jul 2015 – May 2017 · 1 yr 10 mos · Redwood City, CA

Design and develop low latency/high throughput multi-threaded server infrastructure components to handle large amount of real time bidding requests per second
End to end understanding Turn's ad serving and real-time bidding pipelines
Own components of Integrating with SSPs to real time bid ads opportunities and serve impressions
Own Turn's Contextual pipeline from integrating with Contextual Data Providers bring data in to applying contextual/brand safety/page quality data for real time targeting
Redesign/Optimize the contextual targeting pipeline, increase Turn's capacity of handling bid requests 20% by decreasing the data storage and network consumption
Own components of user identity/user matching with exchange partners and data providers
Own components of Creative Approval with Exchange partners

Amazon S3NOSQLJavaAdvertisingReal-time Bidding

Software Engineer

Jan 2014 – Jun 2015 · 1 yr 5 mos · Redwood City, CA

Pros

Software Engineer II

Jul 2012 – Jan 2014 · 1 yr 6 mos · Houston, Texas Area

Developed and maininted several Big Data software systems helping airlines maximize their profit
Designed, implemented and unit tested PROS Real-time Dynamic Pricing System for airlines. RTDP is an engine that provides pricing and availability information to a client, with look-ups and calculations performed at a high rate of throughput
Designed, implemented and bdd tested Itinerary Service system which provides APIs to get a list of itineraries between an origin and destination city pair for specific dates and with specific restrictions

NOSQLJavaCassandraBig Data

Iowa state university

2 roles

Teaching Assistant

Aug 2010 – May 2011 · 9 mos

Principles of Database Systems: Lead recitation, designed programming projects
Fundamental Concepts in Computer Networking: Presented lectures, designed programming projects, graded homeworks.

Research Assistant

Feb 2009 – Jun 2011 · 2 yrs 4 mos

Designed, developed and finished a distributed/embedded system(An Integrated Network of Roadside Sensors and Vehicles) which was used to improve Driving Safety in rural area (using nesC, tinyOS and TelosB)
Designed, developed and finished a distributed/embedded system which assist WiFi Transmission for Multi-Interface Mobile Devices using ZigBee(using Java, C, nesC, tinyOS and TelosB )
Conducted performance test (message dissemination, sensor sensing, communication system) on a wireless sensor nodes and vehicles test bed

Dareway software company

Team Leader

Feb 2004 – Jul 2007 · 3 yrs 5 mos

Developed and maininted several 3-tier distributed information management systems for medical insurance companies and hospital partners to provide the general public with quality healthcare services.
Lead an agile software development group to design and implement a 3-tier information management system used by hospital partners(using PowerBuilder, Dcom, Oracle)
Lead a team to develop and maintain a 3-tier information management system used by medical insurance company(using PowerBuilder, Java, Weblogic, Oracle)
Responsible for both Client (PowerBuilder, GUI Development) side and Server (Java Application, JDBC and Oracle) side development.
Developed and maintained a client/server system used by pharmacy to exchange information with insurance company(using PowerBuilder, Oracle)