Refactoring Courses and Certifications

Refactoring for Production Readiness

Refactor a task API for production readiness with Zod validation, repository-based data access, and JSON file persistence.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate

ChariotSolutions

Cutting Code Quickly: From 0% to Cleanly Refactored 100% Tested Code

Learn three techniques for safely cutting through legacy code: combination testing, coverage-guided decisions, and provable refactorings.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Free Video

Android Developers

Android Architecture Refactoring - Lessons from Duolingo and Headspace

Duolingo and Headspace explain how Android architecture refactoring affected app performance, developer productivity, and user benefits.

• YouTube
• 34 minutes
• Self-Paced
• Free Video

NDC Conferences

Refactoring Is Not Just Clickbait

Refactoring is a design process shaped by practical and social obstacles, not just a cleanup click or automated code transformation.

• YouTube
• 1 hour 7 minutes
• Self-Paced
• Conference Talk

NDC Conferences

Domain-Driven Refactoring

Learn to spot code smells in existing procedural code and refactor it safely toward a more cohesive domain model.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Conference Talk

NDC Conferences

Domain-Driven Refactoring

Refactor existing procedural code toward a cohesive domain model, using code smells and design patterns to guide safe changes.

• YouTube
• 1 hour
• Self-Paced
• Conference Talk

NDC Conferences

Refactoring Is Not Just Clickbait

Refactoring is presented as an ongoing design process for managing complexity and technical debt, not merely an automated code transformation.

• YouTube
• 1 hour 4 minutes
• Self-Paced
• Conference Talk

NDC Conferences

Domain-Driven Refactoring

Refactor anemic, procedural code into a cohesive, encapsulated domain model using code smells, design patterns, and incremental techniques.

• YouTube
• 1 hour 2 minutes
• Self-Paced
• Conference Talk

NDC Conferences

Refactoring to Immutability

Explore how to reduce mutable state in existing code through practical refactoring, treating immutability as an achievable design goal.

• YouTube
• 1 hour 3 minutes
• Self-Paced
• Conference Talk

Career Certificate

Advanced Interview Prep for Senior Engineers in Python

648 ratings at CodeSignal

Advanced Python interview preparation covering data structures, design patterns, refactoring, backward compatibility, and problem-solving practice for senior engineers.

• CodeSignal
• 21 hours
• Self-Paced
• Free Certificate
• 5 courses

GitHub Copilot with Python

7 ratings at Udacity

Learn to use GitHub Copilot in Python workflows, from prompting and agent modes to refactoring a legacy Sudoku codebase.

• Udacity
• 6 hours
• Self-Paced
• Paid Course

GitHub Copilot with JavaScript

3 ratings at Udacity

Use GitHub Copilot to prompt, generate, test, and refactor JavaScript code, including modernizing a legacy Sudoku game.

• Udacity
• 6 hours
• Self-Paced
• Paid Course

Monolith to Microservices at Scale

Refactor an existing monolithic app, Udagram, into lean microservices and deploy it with Docker containers and Kubernetes orchestration.

• Udacity
• 21 hours
• Self-Paced
• Paid Course

Career Certificate

Advanced Interview Prep for Senior Engineers in Java

465 ratings at CodeSignal

Prepare for senior Java engineering interviews through advanced data structures, design patterns, refactoring, backward compatibility, and problem-solving practice.

• CodeSignal
• 21 hours
• Self-Paced
• Free Certificate
• 5 courses

Career Certificate

Advanced Interview Prep for Senior Engineers in JavaScript

441 ratings at CodeSignal

Prepares senior engineers for JavaScript interviews through advanced data structures, design patterns, refactoring, backward compatibility, and problem-solving practice.

• CodeSignal
• 21 hours
• Self-Paced
• Free Certificate
• 5 courses