Working on improving Availability of Azure Cosmos DB Service in the face of partial or full Regional outages. Implementing regional failover of Database Shards through Distributed Coordination.

- Driving continuous improvement in Security Posture of M365 Services.- Architected a unified solution for deploying Security Agents to all M365 Services.- Architected a solution for surfacing Security risks and driving action across M365 Services.- Devised solutions for securing M365 Services in Sovereign clouds.

- Technical lead for the O365 Security Scanning Data Pipeline.- Leveraged Azure and modernized the Security Data Pipeline for reliability, scale, and low latency.- Unified all O365 Services under a common Security Scanning infrastructure.- Contributed to optimizations in Security patching of M365 Datacenter machines.

HID Device Support- Designed and implemented the Virtual HID Framework (VHF), which makes it easier to report HIDdevice data to the Operating System.- Standardized the ACPI Button Device in ACPI 6.0 and HID Specifications, and implemented theACPI button driver in Windows 10.USB Device Support- Contributed to development of the new Windows USB 3.0 Driver stack, specifically the xHCIcontroller driver.- Worked closely with 9 controller OEMs and implemented substantial workarounds to makeWindows compatible with all USB 3.0 controllers available in the market.- Contributed to improvements in the xHCI 1.1 Specification.- Prototyped Media Agnostic USB (MA-USB) support for Windows.- Designed Secure Biometrics support for USB connected devices.Windows To Go (Running Windows from a portable USB Drive)- Investigated challenges and prototyped solutions for Windows To Go, in areas like – machineroaming, hibernation, surprise removal, etc.- Implemented USB 3.0 boot support in Windows – crashdump, hibernate, forward progress, etc.Event Tracing for Windows (ETW)- Improved developer tools and APIs to ease ETW adoption in Windows.- Improved performance and scalability of reading ETL files, and real-time consumption of events.- Provided technical support to internal teams in ETW adoption.Performance Counters for Windows (PCW)- Served as maintainer of PCW for six months.- Fixed ship-critical Windows 7 bugs, shipped a DCR, improved code quality, and lent expertise toPCW users.

- Worked on validating the design of ARM Cortex-A8 processor, which powered iPhone 3GS.- Wrote Verilog modules to test features like ECC checks of L2 Cache, aborts and exceptions, andthe AMBA system bus.- Ported RTL Verilog of the Cortex-A8 processor to an FPGA stack for prototyping and validation.- Debugged ARM assembly tests and RTL Verilog in simulation and on the FPGA using debuggingtools like waveform viewers.