Clean Code in Java: Write Professional Code Engineers Love

Master Clean Code Principles Used by Senior Engineers at Top Indian Tech Companies

This course teaches you to write production-quality Java code that your teammates will love — using real-world examples from Zomato, Paytm, IRCTC, Swiggy, Zerodha, and PhonePe. You will go from writing code that “works” to code that is readable, maintainable, testable, and professional.

What You Will Learn

• 9 Golden Naming Rules — Variables, methods, classes that speak for themselves
• 6 Function Rules — Write small, focused, CQS-compliant functions
• Parameter Best Practices — Parameter Objects, no nulls, no boolean flags
• Side Effects & Temporal Coupling — The Passing the Block pattern
• Switch Statements & Polymorphism — OCP-compliant structure
• Comments: Good vs Bad — 5 good types, 7 types to delete
• DRY Principle — 4 types of duplication and when to allow it
• Error Handling — Exceptions over codes, no null in/out
• Code Quality Metrics — CC, LCOM, CBO, Coverage, SonarQube gates
• AI-Assisted Clean Code — Use ChatGPT, Copilot, Claude for code reviews

Who This Course Is For

• Junior to mid-level Java developers (1–4 years experience)
• Backend engineers wanting to level up their code quality
• Developers preparing for senior-level interviews and code reviews
• Engineers working in Indian product companies and startups

Career & Interview Benefits

Clean Code skills directly impact your code review scores, promotion decisions, and interview performance. Senior engineers at companies like Flipkart, Razorpay, and Zerodha consistently evaluate clean code principles during technical rounds. This course gives you concrete techniques you can apply starting from your next PR.