Kumari Sadhana

Cart & Checkout - JAVA

• UPO Deprecation (Project Leadership and Mentorship): Led the deprecation of the legacy UPO microservice by designing and implementing replacement functionality in Java within the HomeServices booking service. Collaborated cross-functionally with senior stakeholders and multiple engineering teams to finalize architecture, and ensure timely, high-quality delivery. Mentored an intern throughout the project, conducting regular code reviews, and providing technical guidance.
• WayHome Pro Re-platforming: Contributed to the re-platforming of the in-house WayHome Pro service, designing and building GraphQL APIs to fulfill protection and assembly orders.
• Cart & Checkout Platform Replatforming (DDD + Hexagonal Architecture): Contributed to the development of highly modular, domain-driven microservices within the Cart & Checkout platform using Java 17. Leveraged DDD principles and Port & Adapter architecture to build basket services. Developed GraphQL mutations for core basket functionality, such as updateItemQuantity, removeItemQuantity, and OrderTotal calculation logic, using record-based value objects and clean domain abstractions.
• Played a key role in stabilizing the platform pre-launch by identifying and resolving critical issues, contributing to a smooth rollout, and an improved customer experience.

Azure Security Team (ACSS). - JAVA

• Trusted Launch Enablement (National Cloud): Led the onboarding of Trusted Launch (TL) features into Microsoft's National Cloud environments, ensuring regulatory compliance, scalability, and secure VM provisioning.
• Image Parity Validation: Designed and implemented the Image Parity feature to detect and validate untagged OS images, enabling support for verified OS deployments with Trusted Launch.
• SKU Parity for VM Support: Delivered SKU parity by partnering with multiple engineering teams to evaluate and enable Trusted Launch support for VM SKUs across various regions.
• Automation and Monitoring: Built synthetic monitoring systems and ARM templates to validate TL functionality and proactively detect deployment anomalies.

VoLTE, Network Team. - C/C++

• Protocol Stack Development and Optimization: Contributed to end-to-end protocol stack upgrades in coordination with global teams at Samsung HQ (South Korea), focusing on 4G LTE and 5G readiness.
• MAC & PHY Layer Enhancements: Minimized exception traffic between MAC and PHY layers for Verizon Wireless (VZW), improving network reliability and performance.
• Feature Development for Korean Telecom Operators: Delivered NE-DC basic functionality tailored for Korean operators, optimizing network throughput, and resource allocation.
• Radio Resource Management: Implemented codec adaptation techniques to encode UL/DL packet size with shared bits, optimizing bandwidth usage.
• Developed features to reserve radio resources for eMTC use cases (paging, RAR) under constrained bandwidth.
• Enhanced MAC layer GBR/Non-GBR relative weight calculations to reduce voice packet delays and prevent underutilization.