Wáng Hǎiliàng (Hal)


  • One of the top Go developers in China
    • aliyun-oss-go-sdk: winner of the ¥34000 prize in the open contest for Aliyun OSS Go SDK
  • Backend architecture & algorithm expert
    • h12.me/sej: Message queue based on segmented journal files
    • Appcoach Market: CVR Estimation algorithm, MongoDB data analytics in Go
  • Passionate about writing well-tested, elegant code
    • h12.me/gspec: an expressive, reliable, concurrent and extensible Go test framework
    • h12.me/realtest: real test environment for Go unit testing, based on Docker
  • Strong Experience in parser and generator
  • Life-long learner
    • h12.me/kpax: I became a Kafka expert and wrote the Kafka client in 2 months


  • Appcoach (2015 - present)

    Technical Director of Appcoach Market & Backend Lead of R&D

    • Advertising product: Appcoach Market (Go, MongoDB)
    • Appcoach Market is a multi-regional, horizontal scalable and fault tolerant ad network that supports:
      • automatic bidding algorithm and rule-based campaign strategy
      • instant data analysis and reporting capability
      • rich protocols to integrate with public/private DSPs/SSPs
  • IBM/SPSS (2009 - 2011)

    Software Engineer

    • Market research product: Data Collection (C#)
  • Qimonda (2006 - 2009)

    Software Engineer

    • Testing system for DRAM wafer. (C++, Ruby, Python)


  • Xi’an Jiaotong University

    PhD Student, 2011 - 2015

    • Open source programmer since 2012 (Go)
    • Exploring the Efficiency and Mechanism of Whistleblowing System on Social Networking Site (published on IEEE ICC 2014)
  • Xi’an Jiaotong University

    M.S. in Systems Engineering, 2004 - 2007

  • Xi’an Jiaotong University

    B.S. in Information and Communication Engineering, 2000 - 2004