Backend Software Engineer working on Google Drive.

Software Engineer on the Google Drive team

As Staff Engineer for Qualcomm, I act as the technical lead for the embedded operating system of the firmware for the Qualcomm Centriq family of server chipsets. My responsibilities include real time scheduling, error services, multiprocessing, memory management, profiling and forecasting, interrupt services, and software architecture. In this role, I implemented many of the core kernel subsystems, like interrupts, synchronization primitives, virtual memory, timers, and structured exception handling. During my tenure, we designed, created, and delivered Qualcomm's first ARMv8 compatible kernel.In this role, I commercialized the firmware for Qualcomm’s first high performance ARM server chipset, Centriq 2400. I also lead the effort to implement and verify the integrated management controller and debug processor firmware for the next generation Centriq chipset on our simulation (Synopsys Virtualizer) and emulation (Xilinx Ultrascale FPGAs) platforms.Outside of the operating system domain, I have designed and written numerous other drivers used in the Centriq firmware. I architected and implemented a robust, point-to-point, shared memory interprocessor communication framework to send and receive data across subsystems and across chips. I created a flexible scatter-gather DMA driver to enable accelerated telemetry collection and offload, and advanced in-circuit debug capabilities. I wrote several ARMv8.2 complaint drivers including our memory management unit driver, our generic interrupt controller driver (GICv3), and our system memory management unit driver (SMMUv3).As part of this role, I also deliver the essential userspace components for the integrated management controller and debug processor firmware on Centriq chipsets. This includes the userspace software handling boot, interrupts, logging, error handling, and build. All of these components form the backbone of our firmware images.

As a Senior Engineer at Qualcomm, I was the technical lead for the operating system used in Qualcomm's embedded management controllers present in our server chipsets. My responsibilities included real time scheduling, error services, multiprocessing, memory management, profiling and forecasting, interrupt services, and software architecture. In this role, I implemented many of the core kernel subsystems, like interrupts, synchronization primitives, virtual memory, timers, and structured exception handling. During my tenure, we designed, created, and delivered Qualcomm's first ARMv8 compatible kernel.Outside of my kernel responsibilities, I was the owner of our system memory management unit and interrupt controller software used throughout our firmware. In this capacity, I wrote our first ARM SMMUv3 driver from scratch, which is now used throughout the system. I also had the opportunity to design, architect, and implement the firmware necessary for operating the DDR and L3 cache subsystems for Qualcomm’s high performance server chipsets. This included bringing up and debugging this firmware on brand new, industry leading silicon. On my previous project I was the lead contributor on the Windows Multiprocessor team focusing on the software that managed the core subsystems (modem, wireless subsystem, audio digital signal processor) on Qualcomm's mobile SoCs.

As an engineer at Qualcomm, I had the opportunity to work on several projects: Binary Runtime Environment for Wireless (BREW), Meego, Windows 7, and Windows 8. My responsibilities included development, triage, debugging, support, and interfacing with internal teams and external customers.

As an intern on the ContentDRM and Legacy BREW Multimedia teams, I was responsible for assisting with the development, maintenance, and testing of the ContentDRM and Legacy BREW Multimedia software. My duties included debugging software issues on hardware devices, as well as on PC development environments.