John Mathew Email & Phone Number

San Francisco Bay Area

Data Protection DR-Series Backup Appliance, QoreStor Software-Defined Storage Platform- Lead engineer responsible for the development and maintenance of the Linux-based platform software used in the QoreStor software-defined storage platform including command-line interface commands, install/upgrade utilities, error reporting and alerts.- Created framework using Python and Terraform for deploying QoreStor as an Azure VM.- Developed and maintained packaging scripts (spec files, cmake) for software components and kickstart scripts for deploying on bare-metal systems and virtual appliances.- Providing ongoing consulting to the support teams maintaining the older Dell/Quest DR-Series Backup Appliances. This includes development of critical bug fixes and security patches

San Francisco Bay Area

Data Protection DR-Series Backup Appliance, - Lead engineer responsible for the development and maintenance of the Linux-based platform software used in the Dell DR-series of backup appliances. This includes the DR command-line interface, install/upgrade software, bare-metal recovery tool, fault-detection, reporting, and handling (SNMP-based), system startup (init. scripts), application maintenance- Responsible for migration of the software to new server platforms and the introduction of new virtual backup appliance products (ESX and Hyper-V) based on the DR software- Delivered a device driver for a Dell-proprietary PCIe NVRAM accelerator card. Debugged DMA engine issues with FPGA vendor. Implemented user-space battery management (software fuel-gauge)- Led a team to integrate NVDIMM-N modules in the DR appliance as a replacement for a PCIe NVRAM accelerator card. This greatly reduced costs while providing a measurable performance increase- Debugged driver issues in third-party NVRAM cards to solve memory issues.- Responsible for analyzing security vulnerabilities in open-source components (OpenSSL, OpenSSH, glibc, bash, etc..) that could impact the appliances, and either mitigating or patching the software against those vulnerabilities

Ottawa, Canada Area

- Lead for file-system development and the proprietary Distributed File-System for the Versatile Service Engine (VSE) telecommunications platform (ATCA hardware platform, Linux-based): Designed and implemented new storage-management features for new blades and products, maintained and supported the software. Integrated DRBD support into the existing platform architecture for fast replication of files between geographically distributed hosts.- Ported an existing media gateway control product from a VrTX-based PowerPC architecture to Linux on Intel x86-64. Implemented VrTX OS scheduling (priority scheduling, preemption-locking) features in the Linux kernel. - Developed file-system training package for support teams.

Ottawa, Canada Area

- Designed and maintained software for Linux kernel as part of the Nortel Carrier Grade Linux group for multiple blades (Intel x86, ARM, PowerPC, MIPS processors) and Open Source environments- Responsible for the development and maintenance of kernel device drivers such as persistent memory for kernel crash dumps and logs, watchdog timers, fault detection and handling (EDAC) for processor, memory, and PCI faults.- Debugged numerous kernel issues in Linux 2.6.x series kernels in areas such as SCTP and TIPC protocols, RAID1, XFS. Often, this required the use of various assemblers (x86, PPC32, PPC64, ARM v7, MIPS64)- Led a Mumbai-based team of contract developers to triage, diagnose, and resolve kernel issues from customers.- Delivered carrier-grade linux and HA-middleware training to external customers- Lead designer and maintainer of VxWorks-based bootrom software for custom MIPS (Broadcom SB1250) and PowerPC boards.- Implemented bootrom support for Compactflash and USB Mass Storage devices (OHCI and EHCI) to be used as boot devices for the router payload images.- Spearheaded the development of a release-management process for bootrom loads including strict versioning of releases as well as vaulting and tracking of all released loads.- Integrated bootrom and payload software loads into engineering change orders (ECOs) delivered to manufacturing. Worked closely with manufacturing teams to ensure validation of bootrom and payload software prior to customer ship.- Extended the existing class-based process scheduler of the proprietary SOS operating system from a single processor system to a shared-memory multiprocessor system.- Implemented and maintained mutual exclusion mechanisms, collision-detection and arbitration mechanisms for concurrent transactions operating on shared memory.- Exploited cache-control features of the PowerPC 604e and PowerPC 7400 to increase performance and reduce latency in an RTOS.