Preethi Sivakumar

Designed and implemented RESTful APIs using Python (Django REST Framework) and PostgreSQL for cloud-native data platform, serving 1000+ daily requests Containerized backend applications with Docker and deployed to AWS S3, reducing infrastructure costs by 90% and improving deployment reliability Built scalable backend services with automated CI/CD pipelines, enabling continuous integration and faster feature delivery Applied database schema design best practices for efficient data modeling and query optim

Developed and maintained a high-frequency, Java-based switch interface supporting millions of daily MTAs (Money Transfer Applications) transactions, ensuring secure and reliable real-time processing. Engineered custom socket connections (PCT/IP) and implemented an “empty socket echo” strategy to reduce transaction mismatches and connection issues. Led the deployment of the first production release, reducing error rates by 25% compared to pre-production benchmarks and decreasing session failures by 85%.

Developed robust Java EE and Servlets-based web applications supporting real-time network operations, including telecom provisioning, performance monitoring, and alarm management. Built automated test suites using Rational Functional Tester (RFT), achieving 95%+ test coverage, significantly improving product quality and stability across releases. Promoted to team lead after 3.5 years; led a 4-member team in modernizing a legacy UI using Angular 8, Angular Material, and PrimeNG, boosting maintainability