DIVYA HEMALATHA BALAKUMARAN

Designed and implemented an AWS SES–based notification service processing 800,000+ events per day using Athena, Glue, and S3, supporting targeted up-sell alerts for 100+ business managers.  Developed high-performance REST APIs with OpenSearch index filtering, enabling real-time data access for 1,000+ client organisations and a platform used by 50,000+ users.

Delivered 5G Fixed Wireless Access web applications using React, Node.js, and GraphQL, supporting 10,000+ field technicians daily and reducing installation time by ~25%.  Conducted structured code reviews & enforced engineering standards, resulting in a 70% reduction in post-deployment defects.

 Developed a frontend plugin for Spotify Backstage, reducing infrastructure request turnaround time from 2 days to 30 minutes.  Built reusable UI components, including dynamic forms and form builders, improving developer productivity by ~50%.  Implemented real-time dashboards using React, Apollo, D3.js, and Material UI for operational and analytics use cases.

 Developed scalable RESTful microservices using Node.js (Hapi) for a high-traffic e-learning platform.  Improved API response times by ~35% through performance tuning and efficient request handling.

 Delivered a greenfield web application using Angular 6, GraphQL, node.js and Docker.  Implemented micro-frontend architecture and CI/CD pipelines, reducing deployment time by 40%.  Worked directly with European clients to refine user stories and ensure alignment with business requirements