Here are 10 repositories on GitHub that will transform your technical interviewing skills:

1. Coding University Interview: A comprehensive study plan for becoming a software engineer.
2. Tech Interview Handbook: Curated coding interview preparation materials for busy software engineers.
3. JavaScript Algorithms: Implementation of algorithms and data structures in JavaScript, with explanations and additional resources.
4. How The Web Works: Explore the inner workings of the internet in this repository.
5. JavaScript Questions: A comprehensive list of advanced JavaScript questions, along with explanations.
6. The System Primer: Learn how to design large-scale systems and prepare for system design interviews, including Anki flashcards.
7. ReactJS Interview Questions: A compilation of the top 500 ReactJS interview questions and answers.
8. Awesome Interviews: A collection of resources in various languages to help you excel in technical interviews.
9. Build Your Own X: Master programming skills by recreating your favorite technologies from scratch.
10. Algorithms and Data Structures in JavaScript: Implementation of algorithms and data structures in JavaScript, suitable for beginners.

Check out these repositories to enhance your technical interviewing abilities!