Shijing Xian

About Shijing Xian

Niantic:Graph-based Machine Learning framework, 3D scanning, GPU optimization, SLAM, Deep learning obfuscation, AR headset, CV algorithms optimization. C++, Build systemProjects:3D Scanning: Scanning Framework, Visualization, Neural Network Quality ControlMono repo: Bazel, CIs, dependency managementARDK & optimization: GPU shaders, SIMD, SDK, C++, C#Machine Learning Framework: I founded it as a 20% project, promoted it to formal project and drove it for production integration.AR Headset: Ported Niantic ARDK to QCOM QVR services & Nreal SDK on NReal headsets.SLAM: Ported Niantic SLAM algorithms to cloud, and various performance optimization.Google experience:Embedded system development.TL of two confidential wearable projects at Google focusing on embedded system development and multi-mic array technologies. Key contributions:SW lead from the beginning of the projects, made amazing progress in short time: 6 months to dogfood devices with most of features complete (both SW and HW).Drove collaboration with UX teams, PMs on features planning and prototyping.Tech lead a team of >10 SWEs and managing 3 global teamsDesigned the whole SW architecture of the RT embedded system code and led the design of most SW modules.Responsible for the whole system performance and optimization.Founded an innovated AR device project.Started from innovation ideas which tackle many challenging issues from different angles.Proved the POC by many SW/HW prototypes.Pitched the ideas and presented to the multi teams (including Android team, VR team and Glass team)Led engineering teams (optic, EE, UX) on project plannings, tasks prioritizing, and management.Google Glass:Made a P2P video demo app on Glass with hardware encoder and some other optimizations from blanket state (done in 4 weeks), extended the lifetime of the video call 6X on Glass V2 device.Validated various external vendors’ multi-mic algorithms.Designed and implemented the audio pipeline code by refactoring all the C audio code into C++, and wrote dozens of test cases, the work was done within one month.Ported WebRTC NoiseReduction algorithm to Glass, and figured out a low cost wind noise reduction by thinking out of box.Made “Ok Glass” working during the phone call. Owner of media code in Chrome.Specialized in real-time audio technologies, chromium specific technologies, software architecture in C++.Participated in product development for WebAudio, WebSpeech, Pepper flash, Screen Cast.etc.~17 patents:https://patents.justia.com/inventor/shijing-xian

Experience

1. Software Engineering Manager

   LiveKit

   Oct 2025 — Present · Bellevue, WA, US

Education

• Chalmers University of Technology

  Master, Digital Communication Technology and System

  2005 — 2007

Skills

• C
• C++
• Software Engineering
• Embedded Software
• Python