Adarsh Srivastava

Software Development Engineer @Simplify Money

Noida, IN

Implemented OAuth2 login flow using Spring Security with a custom OAuth2UserService to map and persist third-party user information post-authentication.• Integrated JWT-based authentication and authorization mechanism, including token generation, validation, and custom exception handling for expired/invalid tokens.• Built and optimized multiple backend APIs involving DynamoDB, pagination, and role-basedauthorization to ensure high scalability and secure data access.• Developed features leveraging OAuth2 permissions to access users’ emails securely and automate the extraction of financial insights without requiring manual input.