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Jimmy Chang

Jimmy chang

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location of Jimmy ChangTaoyuan City, Taoyuan City, Taiwan
Phone number of Jimmy Chang+91 xxxx xxxxx
Followers of Jimmy Chang371 followers

  • Timeline

    Jan 2012 - Jan 2013

    Web Developer

    KKBOX Inc.
    Jul 2014 - Sept 2014

    Software Engineer

    Industrial Technology Research Institute (ITRI)(工業技術研究院, 工研院)
    Oct 2015 - Jun 2019

    Full Stack Engineer

    Inwellcom Technology
    Current Company
    Jan 2017 - now

    Co-Founder & Developer

    Orbitalyang.com
    Jul 2019 - Nov 2024

    Senior Software Engineer

    Innova Solutions
    Taipei City, Taiwan

  • About me

    Sr. Software Engineer at Innova Solutions

  • Education

    • Yuan-ze university

      2009 - 2013
      Bachelor's degree computer science

    • National tsing hua university

      2013 - 2015
      Master's degree computer science, natural language process

      We present WriteAhead(http://writeahead.nlpweb.org), a prototype system, that automatically extracts and displays relevant grammar error correction patterns with examples to prompt the user as they type or mouse around a draft. Preliminary experiments and evaluation results on a publicly available dataset, show our method works reasonably well for preposition errors.

  • Experience

    • Kkbox inc.

      Jan 2012 - Jan 2013
      Web developer

      • Implemented time card page with PHP and deployed to the HR system.• Maintainted backend of Intranet system used employees.

    • Industrial technology research institute (itri)(工業技術研究院, 工研院)

      Jul 2014 - Sept 2014
      Software engineer

      • Implemented and trained a word tag classification model with wiki tags and groups. This model can map a word with groups with 85% predictive accuracy.

    • Inwellcom technology

      Oct 2015 - Jun 2019
      Full stack engineer

      SmartChoice - is an intelligent building web platform to manage sub-systems and IoT devices.- Responsible for backend and frontend development, designed database and data models.- Started from scratch to use C# .Net MVC, AngularJS, and SQL Server to implement web platform.- Designed and implemented 90% services of platform.- Deployed platform into 3 industrial buildings those earned with Smart Building Silver Mark.

    • Orbitalyang.com

      Jan 2017 - now
      Co-founder & developer

      Orbitalyang.com (2020-)• Re-branded iStock website to orbitalyang.com. Serving around 200+ VIP members daily.• Used WebSocket to design a communication protocol between quoting backend service and frontend.• Integrated with WordPress to host 200+ technical articles and videos.• Integrated with 3rd cash service to provide credit card and ATM transaction.iStock (2017-2020) • Designed a free web service about Taiwan stock - iStock. To provide a real-time pricing and analysis of 1745 stocks.• Managed database for daily trade information (2019/02/18 - 2020) Show less

    • Innova solutions

      Jul 2019 - Nov 2024

      Pricing Data Lake & Pricing API (2022.6-): dedicates to provide medical price transparency service with a cost-effective and fast querying API.- Responsible for data ingestion, data validation, data pipeline automation and data testing.- Led to design and implement an efficient parser to solve a critical problem of large file ingestion. Can ingest files without out-of-memory issue (size 100GB -1TB/per file, peek memory used 50MB). Enhanced ingestion speed 192x compared to previous design.- Led to design and implement an automated data pipeline. Monthly ingesting 17 customers' data and generating 30+TB parquet compressed data. Reduce 30% AWS cost of idling tasks and 95% human involvement.- Refactored partitions of data lake, enhanced API query response time from 30s to 10s. - Refactored the Glue table configurations and educe the refreshing time from 6 hours to 3 minutes. Show less

      • Senior Software Engineer

        May 2023 - Nov 2024

      • Software Engineer

        Jul 2019 - May 2023

  • Licenses & Certifications