Technically Led Alexa On-the-Go group, and Tech-First Initiatives.Working on the next generation of the Alexa (Technically leading Multi-Tasking and States)

Architected the Cloud Platforms for AmazonBasics Microwave, Amazon Smart Plug, Echo Plus's Smart Device Control.Worked on cloud platform for the next disruptive device.Proposed and Designed Sidewalk BLE - https://www.aboutamazon.com/news/devices/echo-tile-and-level-devices-join-amazon-sidewalkProposed and Designed Alexa FindMy (1p, 2p, and 3p)Designed Geolocation Data Privacy, Secure Zone (Data Containment and monitoring)Proposed and Designed Amazon Astro's State Store and Journal Services

Amazon Alexa IoT Cloud

Leading PubCenter Back-End- Improved reporting queries (Large Time series data) from minutes to seconds- Created entire back-end infra using Windows Server 2012 and Microsoft SQL Server 2014- Streaming Data Injection to DataMart- Successfully Launching AoL on-boarding- Working on moving back-end DB to Azure Elastic Database

Worked for Product Ads Online Team and Working for Ads Syndication Team (Tech Lead and Agile Champion) - Rearchitecting current stack of product. * Improved entire back end performance 2 time faster (from 370ms to 185ms) - all 185ms reduction by myself. (Increased 15% total Product Ads Revenue) * Adding new machine learning model support feature in online stack. * Creating Key Value Based Reverse and Forward Index use SSD based IDHash Store with In-Memory Key Value Store. * Use C#, C++, SCOPE, COSMOS, IDHash Store, Inmemory Key Value Storage.- Developed Most of End to End Tests and Invented and Implemented solely Continous Integration based on Deployments. (Use C# and SQL)- Publisher Center Backend Migration and Fast Streaming Data Support - Related to AoL Deal (Tech Lead) * Reduce SLA for Analytic data availablity from 4 hours to 1 hours * Windows Failover Cluster Setup (DTC and Querom) / MSSQL Cluster Setup

- Solely designed and developed/implemented automatic Oracle Statistic generator for multi-tenancy database – a U.S. Patent filing in progress- Improved Deploying Oracle Statistic for Multi-tenancy database to across all instances (pods) – two U.S. Patents filed- Managed more than 1000 Oracle Database Table statistics (All faked number) – Having Ownership of Oracle Statistics for all Salesforce.com database tables.- Custom Index Improvement- Formula Based Custom Index functional Tests- Automatic Custom Index Creator Tests and Debugging bugs- Design and Implement RESTful APIs for Internal Debugging Servers- Working on DB Migration 10g to 11g – Checking all functionalities and searching side effects or oracle bug.- Tuned many slow queries in internal monitoring DB.- Create new algorithm for unhandled exception identification from stacktraces.- Improved and redesign/refactor Gack (Internal Unhandled Exception) Auto-Assignment.- Working on Automatic Rollback decision maker

Core OptimizerAutomatic Oracle Statistics Generator in multi-tenancy environment.

Research Programmer

Designed and Implemented the entire trader blotter application using Java, JSP, SOAP, XML, Sybase SQL, and Crystal Reports