Deepak Kumar

Led the design and rollout of the Uber Learning Portal, using React and Next.js to deliver a responsive learning experience across devices. Built and maintained Node.js/Express REST APIs for user accounts, course progress, and personalized dashboards, integrating PostgreSQL for transactional data and MongoDB for activity logs. Implemented secure authentication with JWT and OAuth and established role-based access for drivers, instructors, and admins. Developed an admin panel for centralized content management and user provisioning. Collaborated with UX and product to refine navigation and improve engagement metrics, and ensured reliable production releases through automated testing with Jest and Supertest.

Contributed to the driver onboarding workflow by building React components and integrating with legacy REST endpoints for real-time progress tracking and notifications. Developed Express middleware for input validation and error handling to improve reliability and reduce onboarding support tickets. Migrated authentication from session-based to JWT tokens to support secure multi-device access. Created data pipelines syncing driver activity from MongoDB to analytics dashboards, supporting reporting and compliance, and participated in Agile delivery and on-call support for onboarding-related incidents.

Built and maintained React-based dashboards for Fitbit’s Health Solutions platform, providing personalized wellness insights to enterprise customers. Integrated Node.js backend services with PostgreSQL to support secure user data storage and dynamic reporting. Automated test coverage for new features using Mocha and Chai and worked closely with QA for issue triage. Supported deployments and incident response with senior engineers.