Wei-Chen Liao

Senior software engineer at Appier in Taipei, building recommendation systems on top of large-scale event data. Previously four years at KKBOX on the backend infrastructure team, where he shipped the playlist personalization pipeline. He writes about practical AI integration and project scoping for developers who build alone.

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2 articles by Wei-Chen Liao.

• Project ideas
• Tech stack decisions

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  Build an AI Action Items Extractor: What It Actually Takes

  July 14, 2026

  What it really takes to build an AI action items extractor as a weekend project: the stack, the cost, and who'd actually pay for it.

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  Code Refactoring Techniques That Actually Ship Clean Code

  June 29, 2026

  The code refactoring techniques worth knowing: extract method, composing, branch-by-abstraction, and the signals that tell you when to use each one.