Built/Led Meta's aggregation and anonymization platform from zero

1. which generates ~100 Billion aggregates in near real time

2. which handles hundreds of billions impressions/conversions at Meta scale

3. which scaled 100x Cardinality and reduced 10x cost

4. which protects privacy by using different technologies, kAnon, sensitivity based noise, risk score etc

Drove reliability efforts of High Velocity Events system

1. which serves all the incoming landing page traffics for PrimeDay, BoxingDay, BlackFriday etc with more than 10K QPS during the peak, with 99.999% availability and 300 ms avg latency

2. I designed/implemented the testing infra for integration/regression/stress/level testings before HVEs and fallback mechanisms during unexpected peak

Led the design/implementation of User Tagging System which

1. is responsible for adding tags/features to HULU millions of users and the tags will be used for recommending videos to users

2. processes billions of view/play history from users using big data infra like hdfs/hive/spark/airflow

3. serves user tags for ~50 millions of users in the online system

Led the design/implementation of Push Notification System

1. which supports multiple platform like iPhone, iWatch, android Phone and android watch

2. which supports multiple communication channels, like wifi and bluetooth