resume.json

{
  "$schema": "https://raw.githubusercontent.com/jsonresume/resume-schema/v1.0.0/schema.json",
  "basics": {
    "name": "Junjun Deng",
    "label": "Staff Software Engineer | ML Infrastructure & Distributed Systems",
    "image": "",
    "email": "inivy@msn.com",
    "phone": "+8613126496289",
    "url": "https://medium.com/@cnjdeng",
    "summary": "Staff Software Engineer with 10+ years of experience specializing in ML Infrastructure, distributed systems, and large-scale recommendation systems. Currently leading MLOps initiatives at Tubi, serving 100M+ monthly active users. Expertise in Kubernetes, experimentation platforms, and high-performance backend services.",
    "location": {
      "countryCode": "CN",
      "region": "China"
    },
    "profiles": [
      {
        "network": "GitHub",
        "username": "lilac",
        "url": "https://github.com/lilac"
      },
      {
        "network": "Medium",
        "username": "cnjdeng",
        "url": "https://medium.com/@cnjdeng"
      }
    ]
  },
  "work": [
    {
      "name": "Tubi Inc.",
      "position": "Staff Software Engineer",
      "url": "https://tubitv.com",
      "startDate": "2021-01",
      "summary": "Serve as a key member of the ML Infrastructure team at Tubi, a leading US AVOD streaming service with 100M+ monthly active users.",
      "highlights": [
        "Architect and maintain critical MLOps services that power Tubi's recommendation system",
        "Built online feature store processing 500K+ reads/sec and 1M+ writes/sec",
        "Manage personalization orchestrator service coordinating 100+ machine learning models",
        "Drive infrastructure improvements directly impacting user engagement and platform scalability"
      ]
    },
    {
      "name": "Alibaba Group",
      "position": "Senior Software Engineer",
      "url": "https://www.alibaba.com",
      "startDate": "2018-11",
      "endDate": "2020-12",
      "summary": "Led the design and implementation of multiple mission-critical services for UC News, a service integrated with UC Browser serving 100M+ users.",
      "highlights": [
        "Designed and implemented mission-critical services for UC News platform",
        "Served 100M+ users across multiple regions",
        "Built high-performance backend services with focus on scalability and reliability"
      ]
    },
    {
      "name": "Maiduote Ltd",
      "position": "Architect & R&D Director",
      "startDate": "2017-09",
      "endDate": "2018-11",
      "summary": "Directed R&D department and established AI department from the ground up.",
      "highlights": [
        "Established and led a 5-person AI department from scratch",
        "Delivered knowledge graph-based chatbot for healthcare platform",
        "Reduced doctor-patient communication time by 60% while maintaining high accuracy",
        "Led architectural refactoring of 24haowan.com healthcare platform"
      ]
    },
    {
      "name": "Shuyun E-commerce Ltd",
      "position": "Cofounder & Technical Lead",
      "startDate": "2016-07",
      "endDate": "2017-09",
      "summary": "Co-founded and served as Technical Lead for a startup.",
      "highlights": [
        "Conceptualized and built SameMo, a smart photo-sharing application with facial recognition",
        "Delivered complete solution: back-end infrastructure, iOS and Android apps in 4 months",
        "Led product vision and full-stack development from concept to market launch",
        "Pioneered innovative photo collection technology in Chinese market"
      ]
    },
    {
      "name": "SafetyCulture Inc.",
      "position": "Senior Software Engineer",
      "url": "https://safetyculture.com",
      "startDate": "2015-01",
      "endDate": "2016-06",
      "summary": "Developed and maintained Android application for iAuditor, a leading workplace safety inspection platform used by 30K+ organizations worldwide.",
      "highlights": [
        "Built key features for iAuditor Android app used by 30K+ organizations",
        "Implemented offline data synchronization and report generation",
        "Contributed to mobile application serving global enterprise customers"
      ]
    }
  ],
  "education": [
    {
      "institution": "University of Western Sydney",
      "url": "https://www.westernsydney.edu.au",
      "area": "Computing and Mathematics",
      "studyType": "Master of Science (Honours)",
      "startDate": "2012",
      "endDate": "2014",
      "score": "",
      "courses": [
        "Answer Set Programming",
        "Artificial Intelligence"
      ]
    },
    {
      "institution": "Sun Yat-sen University",
      "url": "https://www.sysu.edu.cn",
      "area": "Network Engineering",
      "studyType": "Bachelor of Engineering",
      "startDate": "2007",
      "endDate": "2011",
      "score": "3.7/4.0",
      "courses": [
        "Distributed Systems",
        "Algorithms",
        "Network Architecture"
      ]
    }
  ],
  "awards": [
    {
      "title": "Qatar National Foundation Postgraduate Research Award",
      "date": "2012",
      "awarder": "University of Western Sydney",
      "summary": "Full scholarship for postgraduate research (2012-2014)"
    },
    {
      "title": "National Endeavor Scholarship",
      "date": "2010",
      "awarder": "Sun Yat-sen University",
      "summary": "Merit-based scholarship for academic excellence"
    }
  ],
  "publications": [
    {
      "name": "Answer Set Programming with One Incremental Variable (ivASP)",
      "publisher": "Academic Journal",
      "releaseDate": "2014",
      "summary": "Proposed ivASP as a novel extension to traditional Answer Set Programming. Developed a complete solver implementation and published peer-reviewed research documenting theoretical foundations and practical applications."
    }
  ],
  "skills": [
    {
      "name": "ML Infrastructure",
      "level": "Expert",
      "keywords": [
        "Kubernetes",
        "Docker",
        "MLOps",
        "Model Serving",
        "Microservices",
        "HPA/VPA"
      ]
    },
    {
      "name": "Experimentation",
      "level": "Expert",
      "keywords": [
        "A/B Testing",
        "Interleaving Experiments",
        "Statistical Analysis"
      ]
    },
    {
      "name": "Programming Languages",
      "level": "Expert",
      "keywords": [
        "Python",
        "Java",
        "Scala",
        "C/C++",
        "TypeScript",
        "Rust",
        "Haskell",
        "Go"
      ]
    },
    {
      "name": "Cloud & DevOps",
      "level": "Advanced",
      "keywords": [
        "AWS",
        "GCP",
        "Terraform",
        "CI/CD",
        "Infrastructure-as-Code"
      ]
    },
    {
      "name": "ML & Data",
      "level": "Advanced",
      "keywords": [
        "TensorFlow",
        "Recommendation Systems",
        "Distributed Training"
      ]
    },
    {
      "name": "Backend",
      "level": "Expert",
      "keywords": [
        "MySQL",
        "Cassandra",
        "PostgreSQL",
        "Redis",
        "Message Queues"
      ]
    },
    {
      "name": "Systems",
      "level": "Expert",
      "keywords": [
        "Linux/Unix",
        "Distributed Systems",
        "Monitoring & Observability"
      ]
    },
    {
      "name": "Web Development",
      "level": "Advanced",
      "keywords": [
        "React",
        "Flask",
        "Django",
        "REST APIs",
        "gRPC"
      ]
    }
  ],
  "languages": [
    {
      "language": "Chinese",
      "fluency": "Native speaker"
    },
    {
      "language": "English",
      "fluency": "Fluent (IELTS 7)"
    }
  ],
  "projects": [
    {
      "name": "Accelerating ML Experimentation with Interleaving - 20x Sensitivity Gain",
      "startDate": "2025",
      "endDate": "2025",
      "description": "Led a cross-team initiative to implement interleaving experiments for Tubi's recommendation system, achieving 20x higher sensitivity compared to traditional A/B testing.",
      "highlights": [
        "Achieved 20x higher sensitivity compared to traditional A/B testing",
        "Enabled direct comparison of ranking algorithms through interleaved result presentation",
        "Reduced experiment duration from weeks to days",
        "Accelerated ML model iteration velocity across entire ML organization"
      ],
      "keywords": [
        "Experimentation",
        "A/B Testing",
        "Interleaving",
        "Recommendation Systems",
        "ML Infrastructure"
      ]
    },
    {
      "name": "Automated Resource Optimization for Large-Scale ML Model Serving",
      "startDate": "2024",
      "endDate": "2024",
      "description": "Led a cost optimization initiative for Tubi's machine learning infrastructure, managing hundreds of Kubernetes pods serving 100+ models.",
      "highlights": [
        "Managed hundreds of Kubernetes pods serving 100+ models across thousands of CPU cores",
        "Implemented intelligent orchestration of HPA and VPA",
        "Achieved 24% reduction in infrastructure costs (saving $500K+ annually)",
        "Maintained service quality while optimizing resource utilization"
      ],
      "keywords": [
        "Kubernetes",
        "Cost Optimization",
        "MLOps",
        "HPA",
        "VPA",
        "Resource Management"
      ]
    },
    {
      "name": "SameMo - Smart Photo Sharing Platform",
      "startDate": "2016",
      "endDate": "2017",
      "description": "Developed an innovative mobile application that leverages facial recognition technology to automatically help users discover and collect their photos taken by others.",
      "highlights": [
        "Leveraged facial recognition for automatic photo collection",
        "Pioneered concept in Chinese market",
        "Single-handedly designed complete product experience and full-stack implementation",
        "Delivered production-ready back-end, iOS, and Android apps in 4 months"
      ],
      "keywords": [
        "Mobile Development",
        "Facial Recognition",
        "iOS",
        "Android",
        "Product Design"
      ]
    },
    {
      "name": "Android Port of ImageMagick",
      "startDate": "2014",
      "description": "Successfully ported the renowned cross-platform ImageMagick image processing library to Android OS.",
      "highlights": [
        "Enabled advanced image manipulation capabilities for mobile developers",
        "Gained 200+ GitHub stars",
        "Actively used in production applications requiring professional-grade image processing"
      ],
      "url": "https://github.com/lilac/Android-ImageMagick",
      "keywords": [
        "Android",
        "ImageMagick",
        "Open Source",
        "Image Processing"
      ]
    },
    {
      "name": "KubeScript",
      "startDate": "2022",
      "description": "Founded and currently lead the KubeScript open-source project, a DRY infrastructure-as-code solution that simplifies Kubernetes DevOps workflows.",
      "highlights": [
        "Created DRY infrastructure-as-code solution for Kubernetes",
        "Reduces configuration complexity for multi-environment management",
        "Improves maintainability for teams managing Kubernetes deployments"
      ],
      "url": "https://github.com/in-fun/KubeScript",
      "keywords": [
        "Kubernetes",
        "Infrastructure-as-Code",
        "DevOps",
        "Open Source"
      ]
    },
    {
      "name": "Open Source Contributions",
      "description": "Contributed to various open-source projects.",
      "highlights": [
        "Rust programming language",
        "TensorFlow",
        "Helidon web server"
      ],
      "keywords": [
        "Open Source",
        "Rust",
        "TensorFlow",
        "Helidon"
      ]
    }
  ]
}