Rajan Kumar Singh Email and Phone Number

• Developed REST APIs to listen for various frontend queries and return JSON responses with less than 1s of response time. Also created a normalized database to store business logic.• Designed a JWT-based authentication backend. Developed email verification, GOOGLE, and APPLE OAuth functionality which accounts for 87% of user signups.• Created a password reset feature by sending a security code to the registered email address. Additionally, for authenticated users, implemented an in-app… Show more • Developed REST APIs to listen for various frontend queries and return JSON responses with less than 1s of response time. Also created a normalized database to store business logic.• Designed a JWT-based authentication backend. Developed email verification, GOOGLE, and APPLE OAuth functionality which accounts for 87% of user signups.• Created a password reset feature by sending a security code to the registered email address. Additionally, for authenticated users, implemented an in-app password change feature. Show less

• In this Shopify-based e-commerce solution, I added a new shipment method to the existing code base, which increased automated inventory by 25%.• In the event that the automated process fails, a backup module was created to generate the necessary CSV files for the manual process.• Enhanced package creation algorithm to optimize packages based on weights. This results in a 2.3% decrease in overall shipment costs.

• Redesigned the frontend dashboard, and implemented some extra business functionality that was previously done manually by directly accessing the database. As a result, merchant onboarding time has been reduced by 40%.• Backend APIs were written to consume and provide data to the frontend.