John Wallis Email & Phone Number

Foster City, California, United States

San Jose

- Reimplemented container hosting framework for NXOS platforms, providing customers with a seamless and consistent interface for running internal and 3rd-party docker containers - Ported container hosting framework to ACI platforms to ensure a shared codebase between NXOS and ACI for streamlining future code maintenance and improved cross-platform compatibilityDesigned, implemented, and maintained an internal script to create virtual NXOS instances, expediting development and test… Show more - Reimplemented container hosting framework for NXOS platforms, providing customers with a seamless and consistent interface for running internal and 3rd-party docker containers - Ported container hosting framework to ACI platforms to ensure a shared codebase between NXOS and ACI for streamlining future code maintenance and improved cross-platform compatibilityDesigned, implemented, and maintained an internal script to create virtual NXOS instances, expediting development and test workflows for hundreds of engineers for fostering a productive and collaborative work environment- Enhanced and maintained High Availability by ensuring hardware and software redundancy, along with enabling In Service Software Upgrade (ISSU), ensuring continuous operation and downtime reduction- Implemented enhancements to makefiles and build-scripts to enable parallel builds of duplicated kernel modules required for LXC containerized ISSU for faster build times and improved containerized software upgrade efficiency - Conducted in-depth analysis of virtual filesystem usage by ISSU startup scripts to identify and implement memory deduplication for enabling ISSU on memory-constrained platforms and optimizing resource utilization- Co-led team to implement translation layer that facilitated 3rd-party apps to configure NXOS networking through standard sockets and netlink APIs for seamless integration and interoperability with external software- Bring-up ICMPv6 on new model-driven ACI platform for enhancing network functionality and ensuring compatibility with the latest networking standards- Earned reputation as a go-to resource for engineering and workflow knowledge, providing valuable troubleshooting advice and support to colleagues, fostering a collaborative and innovative work culture- Championed code-review process for improving software quality and fostering continuous learning and growth among colleagues, resulting in higher-quality deliverables and optimized team performance Show less

San Jose

- Developed and implemented a sockets API translation library, for 3rd-party code to seamlessly access IOS TCP and UDP networking on routers, enhancing compatibility and increased versatility for network applications- Implemented TFTPv6 server and client, significantly enhancing the software and configuration download capabilities for IOS routers over IPv6, contributing to streamlined and efficient network management and updates, while adhering to latest standards- Triaged, root-caused,… Show more - Developed and implemented a sockets API translation library, for 3rd-party code to seamlessly access IOS TCP and UDP networking on routers, enhancing compatibility and increased versatility for network applications- Implemented TFTPv6 server and client, significantly enhancing the software and configuration download capabilities for IOS routers over IPv6, contributing to streamlined and efficient network management and updates, while adhering to latest standards- Triaged, root-caused, and resolved hundreds of customer and internally-detected defects to maintain product quality and customer satisfaction, while also improving the overall performance and stability of the IOS software ecosystem Show less

Rtp

- Formulated manual and automated test plans, expertly executed both manual and automated tests while validating Non-Stop Forwarding feature within IOS High Availability framework for a robust network performance and reliability- Enhanced quality assurance process by performing whitebox testing of IOS sockets, effectively improving test coverage by designing and implementing API-level unit tests to identify and resolve potential issues before deployment- Earned IP Phone Department of… Show more - Formulated manual and automated test plans, expertly executed both manual and automated tests while validating Non-Stop Forwarding feature within IOS High Availability framework for a robust network performance and reliability- Enhanced quality assurance process by performing whitebox testing of IOS sockets, effectively improving test coverage by designing and implementing API-level unit tests to identify and resolve potential issues before deployment- Earned IP Phone Department of Defense (DoD)/Joint Interoperability Test Command (JITC) certification as the first VoIP solution to affirm reliability and security of critical communication for use by critical functions within the US Government. Show less