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Lewis Chang
Senior Backend Engineer @ Appier 沛星互動科技
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Lewis Chang

Senior Backend Engineer @ Appier 沛星互動科技
- A passionate software engineer with 4 years experience, mainly focused at web full-stack development - Scrum master, run a Scrum team with 8 members, help PO to define feature
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Appier 沛星互動科技
National Central University
Taipei City, Taiwan

Professional Background

  • Current status
    Employed
    Not open to opportunities
  • Profession
    Other
  • Fields
    Software
  • Work experience
    4-6 years (4-6 years relevant)
  • Management
  • Skills
    Python
    Backend Development
    Frontend Development
    MySQL
    TypeScript
    AWS
    Angular
    WAD
  • Languages
    English
    Intermediate
    Chinese
    Native or Bilingual
  • Highest level of education
    Master

Job search preferences

  • Desired job type
    Full-time
  • Desired positions
    軟體工程師
  • Desired work locations
  • Freelance

Work Experience

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Senior Backend Engineer

Nov 2022 - Present
Taipei City, Taiwan
- Responsible for campaign delivery service of a MarTech product that can sends customized content to millions of users in few minutes. - Responsible for cross team product that requires heavy communication skill. - Migrated report generation pipeline to cloud-native solution by Argo Workflow. - Surveyed OLAP databases that could improve analytical queries performance by 80% compared to OLTP database on trillions of rows.
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Senior Fullstack Developer / Scrum Master

GoFreight
Full-time
Oct 2019 - Present
Taiwan
- Migrated frontend framework from AngularJS to Angular. - Introduced typing system by Typescript for better maintainability. - Optimized MySQL query with Django ORM for better performance and deadlock issues. - Coached junior developers. - Run a Scrum team with 8 members, defining features and Sprint Goals with team members. - Performed code review for better code quality.

AI algorithm development engineer

Aug 2018 - May 2019
10 mos
1. Using MCTS and other ML techniques to build bots for card games. 2. Building an automated logs processing procedure to find cheating players. (Python/Tensorflow & Pytorch, Scala, Java) 3. Using Telegram chatbot with NLP to deal with routine work in enterprise like meeting room arrangement, attendance management, etc. (Google Dialogflow, Python/Django)

Research and Development Substitute Services

Aug 2015 - Aug 2018
3 yrs 1 mo
1. Analyzing missile performance with 6D simulation. (C++11, Python) 2. Designing missile guiding system. 3. Building CNN for target recognition. (Python) 4. Project management.

Education

Master of Science (MS)
Department of Optics and Photonics
2013 - 2015
Bachelor of Science (BS)
Department of Optics and Photonics
2009 - 2013