Preparing for a technical interview can be a daunting task, especially with the ever-growing demand for skilled engineers. But don’t worry — the internet is loaded with incredible resources that can help you build a solid foundation and crush your next coding interview! Here’s a rundown of the top five platforms that will equip you with the skills and confidence to ace that job interview.

1. LeetCode

🔗 leetcode.com

If you’ve been in the tech world for even a minute, you’ve probably heard of LeetCode. This platform is one of the most popular sites for practicing coding problems that you’ll likely face in interviews at companies like Google, Facebook, and Amazon. With over 2,000 coding problems categorized by difficulty (Easy, Medium, Hard), LeetCode helps you prepare systematically.

Why use LeetCode?

• Extensive problem library: From simple arrays to complex dynamic programming challenges.
• Mock interviews: Simulate interview environments with time-based coding tests.
• Discussion forums: Engage with a global community, see others' approaches, and learn from solutions.
• Company-specific questions: Many companies directly use LeetCode problems in their interviews, so practicing here can give you a direct edge.

2. Interviewing.io

🔗 interviewing.io

Looking for a more realistic practice? Interviewing.io allows you to conduct mock technical interviews with experienced engineers from top tech companies. You can practice anonymously and get feedback on your performance. After enough successful mock interviews, you may even unlock real interviews at companies like Lyft, Facebook, or Dropbox.

Why use Interviewing.io?

• Real interview experience: Work with engineers who have conducted interviews for major tech firms.
• Anonymous practice: No pressure if you make mistakes, as your identity is hidden.
• Instant feedback: Post-interview feedback helps you focus on your weaknesses and improve.
• Job opportunities: Impress in mock interviews and get invites to real ones!

3. Coding Interview University

🔗 github.com/jwasham/coding-interview-university

If you're starting from scratch or want a structured guide, Coding Interview University is a free self-paced roadmap created by John Washam. His GitHub repository contains a comprehensive curriculum to help you go from novice to expert, covering everything from data structures and algorithms to system design and coding challenges.

Why use Coding Interview University?

• Complete curriculum: It’s like a computer science degree without the hefty price tag.
• Free resources: Links to free courses, tutorials, and books.
• Broad coverage: Everything from basic coding principles to advanced algorithmic strategies.
• Perfect for self-learners: John Washam created this while transitioning to software engineering, making it highly relatable.

4. TECHBIRD

🔗 TECHBIRD

TECHBIRD is a WhatsApp-based tech community where you can interact with other learners, share resources, and engage in discussions about coding interviews. This is a great platform to get real-time advice, exchange coding problems, and learn from people who are actively preparing for interviews.

Why use TECHBIRD?

• Peer support: Connect with others who are on the same journey, helping each other out with tips and tricks.
• Community-driven: Get first-hand feedback from those preparing or having gone through recent interviews.
• Resource sharing: Benefit from shared study materials, coding challenges, and mock interview experiences.

5. JavaScript Algorithms

🔗 github.com/trekhleb/javascript-algorithms

If you’re specifically focusing on JavaScript for your technical interviews, this GitHub repository is a goldmine. It contains well-structured solutions to common algorithm problems written in JavaScript, making it a perfect resource for those preparing for front-end or full-stack roles.

Why use JavaScript Algorithms?

• In-depth examples: Each algorithm comes with detailed explanations and code.
• Great for JS developers: Focused exclusively on JavaScript, which is crucial for modern web development interviews.
• Free and open source: Collaborate with a community of developers who contribute to the repo.
• Systematic learning: Organized by algorithm type (search, sort, dynamic programming, etc.).

6. JavaScript Questions

🔗 github.com/lydiahallie/javascript-questions

Another fantastic resource for JavaScript interview prep, this repository by Lydia Hallie provides interactive JavaScript questions covering concepts like closures, promises, hoisting, and async/await. It's ideal for brushing up on core language concepts.

Why use JavaScript Questions?

• Interactive format: Each question is designed to test your understanding of JavaScript fundamentals.
• Updated regularly: Stay up-to-date with the latest trends and best practices in JavaScript.
• Great for interview prep: Tackle the tricky JavaScript questions that are often asked in interviews.
• Community engagement: The GitHub community often adds clarifications, so you can learn from others’ insights.

When preparing for a tech interview, you need both knowledge and practice. The platforms listed above provide everything from coding challenges and mock interviews to peer support and comprehensive study materials. Whether you’re a beginner or a seasoned developer, these 5 resources can help you sharpen your skills, boost your confidence, and give you a serious advantage in your next technical interview.

Happy coding, and good luck with your job hunt!