Achievements and Duties- Coded RESTful APIs based on a user platform that managed over 500,000 concurrent users and supplied data to a third-party system.- Improved user experience by 24% by implementing a Progressive Web App (PWA) system, resulting in a more efficient and user-friendly technology system.- Created, put into use, and changed 5 software systems and custom components.- Engineered custom authentication and authorization features using PassportJS and JWT, improving the security of the website by 80%.- Reduced server response time by 50% by designing and implementing a scalable and effective database structure using MongoDB.- Successfully developed and executed a MERN stack application within an outstanding 12 months.- Increased website reliability by implementing failover and disaster recovery solutions thereby keeping the application at 90% uptime.- Mentored junior developers in the MERN stack and helped them develop their skills which led to a 40% increase in productivity.- Reduced development time by 50% by implementing reusable UI components and modules.- Devised a dynamic dashboard that improved data accuracy by 40%