Sheng Lim

Experience

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  Accesslan Communications

  Aug 2000 - May 2002

  Software Release Engineer

  • Responsible for Software builds/releases of Embedded software for PL2000 series, a central office DSL access multiplexer that allows service providers to provide DSL connections to residents far away from the central office. • Developed build automation scripts.• Worked closely with software developers to track and investigate build problems.• Post build, loaded the software to product and ran sanity tests before release to test groups.• Administered source code control tools (CVS, PVCS Version Manager) and maintained project archives.• Responsible for labeling, branching and merging of build branches.• Responsible for Engineering Change Order (ECO) of final release into production Show less

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  Advanced Fibre Communications

  May 2002 - Dec 2004

  Quality Assurance Engineer

  • Created and executed test plans for: o Telliant5000, a carrier-class , multiservice edge switching platform that includes Frame Relay, ATM, TCP/IP, Routing protocols, and MPLS. o Servers, switches, routers, traffic generators and analysis tools for system, stress/full-loaded and performance. o Third party products such as Cisco for interoperability.• Worked closely with software engineers to debug and verify fixes in engineering builds.• Conducted automation tests in TCL/TK/Expect. Show less

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  Redback Networks

  Feb 2005 - Dec 2006

  Software Test Engineer

  • Automated sanity tests with Perl-based test framework for SmartEdge SE800/600/400 series multiservice Edge Router. • Tested SEOS, a carrier-class modular operating system that runs on SmartEdge platform.• Performed testbed setup, configuration, and maintenance in the lab.• Participated actively in test plan reviews and provided feedback from features and automation perspective.• Provided level of effort for execution of testing tasks. • Performed automated tests, and provided weekly progress reports to management.• Submitted trouble reports and assisted developers in troubleshooting.• Reproduced field bugs in lab environment. Show less

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  Ericsson

  Dec 2006 - Mar 2015

  Software Test Engineer

  • Led the testing effort for Ericsson Smart Service Router (SSR), Simulation of SRR (SSRSIM), and Virtual IP Platform (VIPP) which is the Network Function Virtualization (NFV) platform of Ericsson.• Worked with Virtual IP Platform (VIPP) developers to troubleshoot issues seen in the Point of Delivery (POD). Issues include fuel node down, resource contention in building virtual machines, and connectivity issues due to VLAN allocation.• Provided introduction and training of Virtual IP Platform (VIPP) to various testing teams. • Conducted scrum meeting every morning as scrum master in an Agile environment. Also held conference meeting with offshore team members every other day.• Migrated automated test launcher from legacy to Jenkins.• Built and maintained testbeds. Operated sanity tests and maintained test sytems for both official releases and private builds. • Reviewed and rated bug reports filed by other team members.• Worked with hardware team to upgrade fabric cards and line cards installed on Smart Service Router (SSR) from gen1 to gen3 and provided test results. • Oversaw the test script creation process. Verified and rolled out new test scripts to production.• Verified infrastructure file updates on test framework using a mirrored infrastructure prior to updating production. Show less

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  Google

  Dec 2015 - now

  Network Test Engineer

  ● Set up lab infrastructure for testing products (UE/eNodeB/WBH/MC/SAG/BNG/ePC) fromvarious vendors for Google project of 3.5 GHz Wireless Network trial deployment in KansasCity, Missouri.● Interface with vendors to validate their individual solution offerings and integrate to theend-to-end (E2E) lab environment.● Manage and maintain lab infrastructure across multiple sites. Keep connectivities up andrunning, and components up-to-date via software updates and upgrades.● Set up/configure/test CWDM (Coarse Wavelength Division Multiplexing) in conjunction withSAG (Service Aggregation Gateway) and BNG (Broadband Network Gateway)● Test Air Link Connectivity and Signal Noise Ratio (SNL) on Microwave WBH products(Dragonwave, Airspan, Siklu, etc) with different distances/locations (shield boxes, parking lotand rooftop).● Benchmark test (Throughput/Latency/Jitter/Packet Loss) on Wireless Backhaul (WBH), usingproducts of Airspan, Dragonwave, Siklu, etc● Configure eNodeB from vendors including Nokia, Airspan, and Ericsson. Provide Backhaulsolution to reach ePC (Evolved Packet Core) such as Aricent, Google Marconi, and EricssonEPG (Evolved Packet Gateway). Show less