• Migrated 7 billion OAuth2.0 tokens from regional to global DynamoDB tables using dual write and AWS Gluescripts, ensuring data consistency and no downtime.• Completed the Design and development of the requirement to Inform guardian accounts about the graduationof their child(minor) accounts into reguler accounts and enhanced the feature to support multiple countries and time zones.• Implemented efficient Full-Jitter based failure retry strategy for Client-management service to avoid the“thundering herd” problem by adding randomness to the retry intervals, which can prevent multiple retriesfrom happening simultaneously.• Successfully conducted design and development of RESTful API to delete user accounts with incompleteEmail-id verification.• Strategically developed and monitored the feature to block disposable email domains from creating an accounton the Samsung Accounts platform.

• Designed and implemented the API to send credit and debit card tokens to merchants, eliminating the need tosend confidential card information for subsequent transactions.• Improved coverage of Notification service by adding positive and negative test cases.• Provided continuous support towards updating server-to-server communication URLs as per merchantrequests