Kinesis, Managed service kafka, stream log applications

•Technical lead on DataScientist team•Optimize Logistics planning•Deploy ML pipeline for related product

• Application of MLOps based on kubernetes and mlflow to data science team• Kubernetes & Airflow & mlflow based machine learning promotion-targeting system architecting• Development of AB testing system based on Stratified sampling• Development of user consumption regression model based on action log in app service (LSTM)• Development of service sales forecasting model ensemble with fbprophet and LSTM• Promotion personalization based on contextual bandit• Develop Buying user classifier based on LSTM & item purchased logging data, 14% increase in sales.• Modeling Azar app user engagement state by Hidden Markov-Model• Modeling and estimating the creation mechanism of the Azar matching network based on Barabasi-Albert model.• Development dynamic pricing model for user match balancing from mis match in rate for male and female based on time & country

• DBMS architecture refactoring, in legacy architecture based on AWS Redshift, RDS, Redis and S3, renewal to Redis, S3. $ 200 savings per day & 10% increase in response rate• Logging data pipeline ETL, based on AWS Firehose, Kinesis, Lambda, Glue, Athena• DSP Tracker & Bidder C# to python refactoring, based on AWS ECS, CI/CD based on Jenkins• Async Redis bulk updated service architecting on AWS Lambda, SQS

• Researching user fatigue in mobile advertisement• Develop Google Ad exchange abusing publisher-classifier• Develop RFM feature based buying user classifier• Estimating app revenue and download counting in Google Play Store app ranking• CTR prediction model based Field-aware Factorization machine

Research - Spin/valley dependent physicsSpin and valley dependent photonics, electronics and optoelectronics in low-dimensional semiconductors for novel spintronic and valleytronic devices- 2D heterostructuresDeveloping new heterostructures based on graphene and other 2D materials in terms of fabrication, unprecedented functionalities, and novel material properties