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Best Path Research22 September 20258 min read

My Claude Code Journey: The Developer Skills I Had to Learn

A reflection on lessons learned during a Summer 2025 internship at Best Path Research in Tokyo, building a business simulation game with Django, Python, and Claude Code as a development assistant.

AI doesn't make you a better developer by being right; it makes you better by challenging you to think critically about everything it produces.

Key takeaways

  • Without precise, first-principles instructions AI will overcomplicate simple tasks
  • Prompt engineering is a critical technical skill comparable to traditional programming
  • Working with AI is like advanced rubber duck debugging: articulating the problem clearly often solves it before code is generated
  • AI-generated code requires constant defensive verification, especially for business logic edge cases
  • Designed a 27-module Python testing framework that saved 40+ hours per testing cycle
  • Architectural decisions and system design remain entirely the developer's responsibility
AI/MLClaude CodeDjangoPythonDeveloper Experience
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