Oct 2020 – Nov 2021 · 1 yr 1 mo · Pune, Maharashtra, India · Remote

• VMware Carbon Black Endpoint Security Solutions:
• Contributed to the development of Linux Kernel Security Hooks.
• Involved in the conanization of modules and managing dependencies using conan.
• Developed and maintained RPM and Deb packages for software deployment.
• Refactored C++ code to transition from platform-specific to platform-independent, ensuring compatibility across Linux, Mac, and Windows.
• Utilized the CppU Test framework for unit testing and validation.
• Additional Responsibilities:
• Debugged and resolved critical customer issues.
• Added support for new Linux distributions, including RHEL, Ubuntu, and Debian, within Carbon Black products.
• Worked on implementing a Local Reputation checker for Linux-based operating systems.

Apr 2020 – Oct 2020 · 6 mos · Hyderabad, Telangana, India

• Role: BSP Engineer in the Android Kernel Team.
• Responsibilities:
• Debugged and resolved Android kernel stability issues, including CPU hang, memory corruption, stack corruption, bitflips, watchdog issues, reboot problems, memory leaks, and other platform stability challenges.
• Led BSP Board bring-up and Kernel/OS bring-up on Qualcomm chipsets, specifically ARM64 architecture.
• Ported Google and Qualcomm CVE patches into large, active codebases, ensuring system security and stability.
• Addressed and resolved customer-reported issues, providing timely and effective solutions.

Aug 2017 – Mar 2020 · 2 yrs 7 mos · Ahmedabad, Gujarat, India · On-site

• Linux Memory Management:
• Strong understanding of Linux memory management, including configurations, virtual memory, and DMA.
• Developed device drivers for the allocation and deallocation of CMA memory in both user space and kernel space.
• Proficient in ION, Google’s memory manager for Android devices, with experience in debugging memory allocation issues, reducing memory fragmentation, and managing memory for GPU/VPU drivers.
• Contributed to the Linux Foundation/Kernel by reporting a stable kernel (4.12+) bug in CMA, documented on the Linux Kernel Mailing List.
• TI-RTOS and Quadros:
• Identified and understood TI-RTOS PRU and related drivers.
• Integrated TI-RTOS PRU drivers into Quadros and developed a demo application in Quadros to test PRU using Code Composer Studio (CCS).
• Solid understanding of Quadros, Quandet Stack, and am335x PRU.
• Yocto Build Environment:
• Experience working with the Freescale i.MX6 processor in the Yocto Build Environment.
• Responsible for design, coding, testing, bug fixing, and documentation.
• Identified problems in existing systems and ensured on-time delivery while meeting quality and productivity goals.
• Customer Interaction:
• Engaged in customer collaboration, interaction, and support for customer queries.
• Linux System Modifications:
• Extensive knowledge in modifying Linux device drivers, bootloaders (U-Boot), kernel configurations, device trees, Linux file systems, board configuration, and BSP.
• Good understanding of open-source embedded Linux.
• Modified and debugged the TI-lm49350 audio driver to support headphones and speakers.
• Ported the capacitive hy462x touchscreen Linux driver for custom products.
• Comfortable working with I2C and SPI protocols.

Feb 2017 – Aug 2017 · 6 mos · Ahmedabad Area, India

• Custom Embedded Linux Development on OpenWrt:
• Developed C applications including a UDP socket server, daemon processes using libdaemon, SSL implementations with OpenSSL, network packet multicasting, and UCI library integration.
• Strong understanding of the OpenWrt build system, including the creation of Makefiles and kernel packages using Autotools.
• Experience in cross-compilation on OpenWrt for routers such as TP-LINK MR3020 and OM2P.
• Skilled in flashing firmware on routers via serial console.
• Wireless and GUI Expertise:
• Good understanding of wireless mesh networks (Wi-Fi).
• Basic understanding of GUI development using C++ with Qt.

Jul 2016 – Jan 2017 · 6 mos · Noida Area, India

• Device Driver Development:
• Developed serial port device driver for PC16550D UART.
• Created a parallel port device driver for 74LS244.
• Developed a character driver for SCULL (Simple Character Utility for Loading Localities).
• Client-Server Communication:
• Implemented client-server communication using sockets and threads.
• Developed client-server communication using inter-process communication (IPC) and threads.
• Data Management and System Calls:
• Developed solutions for multiple data compression and encryption using iterative techniques.
• Proficient in system calls such as open, close, read, write, lseek, and ioctl.
• Worked with proc/sys filesystem entries and kernel timers.
• Managed interrupts (top halves/bottom halves).
• Synchronization Techniques:
• Utilized synchronization methods including semaphores, mutexes, spinlocks, completion, and I/O blocking.
• Implemented capabilities and bit manipulation.
• Networking and IPC:
• Familiar with Linux networking address family protocols such as AF_UNIX, AF_INET, AF_INET6, and AF_PACKET.
• Worked with pipes, FIFOs, message queues, and shared memory.
• Implemented fork and exec system calls.
• Managed synchronization and signaling in threads using semaphores, mutexes, and signals.