•In dev and prod, designed and implemented data storage shift from AWS S3 to Mongodb and all ETL end points. Halved UI render time to 480ms and enabled more functionalities development due to flexible data storage. Migrated all data using multi-threading with zero failure. Used Java, Spring Framework, MongoDB and AWS S3/Batch/SQS.
•Refactored current code and added tests, and increased test coverage from 42% to 80%.
•For over 20 Sklearn, XGBoost and LightGBM machine learning models supported, implemented automatic hyperparameter value verification and incorporated into both the WebApp and DS library. Used Python and Jython.
•Created new admin pages to monitor various ML build and resource usage statistics. Implemented backend logics, controller end points and admin authentication. Used React, Redux and Java.
•Built prototype of Alexa extension for Indeed, and won 2nd Place and ‘Most Likely to Succeed’ award in hackathon