Free Course — No signup required

Learn Code Quality
in 5 Days

Name things clearly. Write functions that do one thing. Refactor confidently.

5 lessons
Self-paced
~60 min/day
Free forever
No account needed
Start Day 1 — Free → See what's covered
What you'll learn

Clean Code in 5 Days

Free 5-day clean code course. Naming, functions, SOLID principles, refactoring techniques, and running effective code reviews.

  • Name variables, functions, and classes so they need no comments
  • Write functions that do exactly one thing and do it well
  • Apply SOLID principles without over-engineering
  • Identify and safely eliminate code smells
  • Refactor existing messy code step by step
  • Give and receive code reviews that actually improve code
SOLID
principles
DRY
WET
5
lessons
$0
cost
5-Day Curriculum

Every lesson has a real exercise.
No theory without practice.

01
Naming & Comments
Meaningful names, self-documenting code, when comments help vs hurt
namingself-doccomments
→
02
Functions & Single Responsibility
Small functions, pure functions, avoiding side effects
SRPpure functionsside effects
→
03
SOLID Principles
Each SOLID principle explained with before/after code examples
SOLIDOCPDIP
→
04
Refactoring Techniques
Extract method, replace conditionals, eliminate duplication
extract methodcode smellsDRY
→
05
Code Review Practice
How to give useful feedback, PR checklists, team standards
PR reviewcheckliststandards
→
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Your instructor
B
Bo Peng
Founder, Precision AI Academy

Kaggle Top 200 data scientist. Trained 400+ professionals across universities and federal agencies. Built production systems at scale. This course is practical first — every lesson has code you can run and an exercise you can finish in under an hour.

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