{
  "version": "https://jsonfeed.org/version/1.1",
  "title": "Chijun Sima updates",
  "home_page_url": "https://www.chijunsima.com/",
  "feed_url": "https://www.chijunsima.com/feed.json",
  "description": "Publications and career milestones from the academic homepage of Chijun Sima.",
  "language": "en",
  "icon": "https://www.chijunsima.com/icon-512.svg",
  "favicon": "https://www.chijunsima.com/favicon.svg",
  "authors": [
    {
      "name": "Chijun Sima",
      "url": "https://www.chijunsima.com/"
    }
  ],
  "items": [
    {
      "id": "https://www.chijunsima.com/#experience-2026-08",
      "url": "https://www.chijunsima.com/#experience",
      "title": "PhD Student in Computer Science, The University of Texas at Austin",
      "content_text": "PhD Student in Computer Science at The University of Texas at Austin (Aug 2026 – Present).",
      "date_published": "2026-08-01T00:00:00+08:00",
      "tags": [
        "experience"
      ]
    },
    {
      "id": "https://www.chijunsima.com/#ekko-osdi-2022",
      "url": "https://www.chijunsima.com/#publications",
      "external_url": "https://www.usenix.org/conference/osdi22/presentation/sima",
      "title": "Ekko: A Large-Scale Deep Learning Recommender System with Low-Latency Model Update",
      "content_text": "OSDI '22. Low-latency model update system for multi-terabyte deep learning recommendation models, achieving 2.4s update latency, 10,000x model-size scaling, and large production impact in WeChat.",
      "date_published": "2022-01-01T00:00:00+08:00",
      "tags": [
        "publication"
      ]
    },
    {
      "id": "https://www.chijunsima.com/#experience-2020-07",
      "url": "https://www.chijunsima.com/#experience",
      "title": "Senior Software Development Engineer, Tencent's WeChat division",
      "content_text": "Senior Software Development Engineer at Tencent's WeChat division (Jul 2020 – Aug 2026).",
      "date_published": "2020-07-01T00:00:00+08:00",
      "tags": [
        "experience"
      ]
    },
    {
      "id": "https://www.chijunsima.com/#experience-2018",
      "url": "https://www.chijunsima.com/#experience",
      "title": "Developer (commit access), LLVM",
      "content_text": "Developer (commit access) at LLVM (2018 – Present).",
      "date_published": "2018-01-01T00:00:00+08:00",
      "tags": [
        "experience"
      ]
    }
  ],
  "_meta": {
    "updatedAt": "2026-10-02T10:43:21Z"
  }
}