I Tried 30+ Coding Interview Resources — Here Are My Top 7 Recommendations for 2025

My favorite Coding Interview Resources for 2025

Hello guys, after spending the last few years preparing for technical interviews — from FAANG-level system design rounds to startup-style coding challenges.

I’ve tried more than 30 different platforms, books, and mock interview resources. Most of them promise to “get you interview ready,” but only a few truly deliver.

In this post, I’ll share the 7 best coding interview resources I personally recommend in 2025 — based on real experience.

These platforms stand out for their structure, depth, and practical value, not just hype. I’ll also mention some ongoing discount offers you shouldn’t miss if you plan to join now.

How I Chose These Resources?

I didn’t pick these platforms randomly. Over the past few years, I’ve spent hundreds of hours studying data structures, algorithms, and system design while preparing for interviews at major tech companies.

During that time, I tested nearly every well-known resource — from YouTube playlists to premium courses.

Here’s what I looked for when narrowing it down to my top seven:

Practical learning experience — I preferred courses that taught through examples, visuals, or hands-on problems rather than just theory.
Structured curriculum — Resources that built concepts progressively instead of dumping random problems ranked higher for me.
Coverage of all interview areas — A complete prep should include coding, system design, and behavioral components.
Instructor expertise — I gave more weight to courses created by experienced engineers or ex-interviewers from top tech companies.
Value for money — Since most of these platforms offer paid plans, I considered the depth of content, community access, and discount offers.

Every resource in this list has personally helped me either improve my problem-solving speed, understand design patterns more deeply, or gain confidence during mock interviews.

My Top 7 Coding Interview Resources for 2025

Without any further ado, here are my top 5 recommendations for learning Coding interview precreation in 2025 and beyond. These courses and resources are not just to learn general Coding interview patterns and System Design concepts but also solve company specific questions and practice online.

1. ByteByteGo — Best for System Design | My Premium Pick

ByteByteGo by Alex Xu and Sahn Lam is my #1 choice for system design and coding interview prep, especially after their recent site upgrade where they have added content of 7 of their books into platform.

It’s incredibly structured, visual, and beginner-friendly. Their animated illustrations and deep explanations make even complex distributed systems easy to understand.

They’ve also recently added sections on Coding Interview Patterns, OOP Design, Generative AI System Design and Machine Learning System Design course based on their popular books like Machine Learning System Design Interview.

Special Offer: ByteByteGo is currently offering a 50% discount on their lifetime plan, which gives you unlimited access forever — this is the best value deal they’ve ever had.

Here is the link to explore — Join ByteBytego with 50% discount

2. AlgoMonster — Best for Data Structures & Algorithms

If you’re tired of grinding LeetCode blindly, AlgoMonster is a breath of fresh air. It organizes problems by patterns (e.g., sliding window, backtracking, dynamic programming) and teaches you the reasoning behind each solution.

The platform also offers interactive explanations and visualizations that make learning fun and memorable. They also have a list of 50 popular coding interview questions known as Monster 50 which I highly recommend every developer to go through.

On top of that they have very structured way to solve problems like first they will ask you to identify pattern and then template and then you can code solution and finally estimate time and space complexity.

This is by far the best platform and structure I have found online when it comes to practice coding problems. Their solution is also very detailed and even if you know the solution you can go through them to learn more about coding patterns, data structures and algorithms.

Special Offer: Get 50% off the lifetime plan — perfect if you want long-term access without subscription fatigue.

Here is the link — Join AlgoMonster with 50% discount

3. Educative — Best for Complete Coding Interview Path

Educative’s “Grokking” series has become legendary. Courses like Grokking the Coding Interview, Grokking the Modern System Design Interview, and Grokking the Low Level Design Interview Using OOD Principles have helped thousands of developers crack big tech interviews.

It’s also text-based, meaning you can read and code interactively — no video fluff.

They are also AI powered and probably the best coding interview platform when it comes to using AI for improving learning experience. They also have AI based mock interview which you can use to further improve your knowledge.

Coming with deep FAANG expertise, their courses are really good for anyone who is aiming for Software Engineer or Senior Software Engineer roles in FAANG companies.

Special Offer: Educative is currently offering 55% off their annual plan, which unlocks all 500+ courses.

Here is the link to learn more — Join Educative.io with 55% discount

4. DesignGurus.io — Best for System Design Interview Practice

If you like Educative’s Grokking series, you’ll love DesignGurus.io — it’s created by the same instructors who initially created popular grokking courses for Educative.

Now, it’s the home for classic courses like Grokking the System Design Interview and Grokking Dynamic Programming Patterns for Coding Interviews.

They also include mock interviews, real-world case studies, and architecture reviews — things most courses skip.

DesignGurus.io also have many other Grokking courses to preapre for essential coding interview topics like OOP Design, System Design, Dynamic Programming etc and you can get access to all of their courses for a big discount by joining their All course bundle. You can also use code GURU to get 30% discount.

5. Udemy — Best for Affordable, One-Time Purchase Courses

Udemy remains a goldmine for coding and interview prep if you know where to look. You’ll find high-rated courses like:

The best part? Udemy courses often go on sale for $9.99–$14.99, making it one of the most affordable platforms on this list.

By the way, Udemy also have many great System Design courses which are worth checking out, like the one from Frank Kane, ex Amazon Hiring Manager and Sandeep’s System Design course.

And, if you want to join multiple course on Udemy, its may be worth getting a Udemy Personal Plan, which will give instant access of more than 11,000 top quality Udemy courses for just $30 a month.

If you got a lot of time and want to save money, Udemy Personal Plan will be perfect for you.

6. Zero to Mastery Academy (ZTM) — Best for Full Career Growth

ZTM is great for developers who want to go beyond interviews and build long-term career skills. Created by famous Udemy instructor Andrei Negaoie this is a bootcamp style platform which also host some of the very best coding interview courses.

Their Complete Coding Interview Bootcamp and Master the Coding Interview: Big Tech (FAANG) Interviews courses are practical, project-based, and community-driven.

You also get access to their private Discord group, which is full of supportive learners and mentors.

Btw, you would need a ZTM membership to watch this course which costs around $299 per year or $1299 for lifetime access, but also provides access to many super engaging and useful courses like this one.

You can also use coupon code FRIENDS10 to get a 10% discount on this course or any subscription you choose.

Here is the link to join — explore ZTM Academy

7. LeetCode — Best for Practice Problems

LeetCode is the OG of coding interview prep. Even though other platforms help you learn patterns, nothing replaces actual problem-solving practice.

They have 3000+ coding problems covering every aspect of coding interview patterns, while I don’t expect you to solve all those questions, its a great place to practice and build confidence.

There are also huge sub-reddits and other Leetcode communities where you can ask for help or pair up with other folks who are preparing for coding interviews.

I recommend using LeetCode alongside platforms like AlgoMonster or ByteByteGo to reinforce what you learn.

👉 Practice on LeetCode

Bonus: Exponent — Best for Mock Interviews and Behavioral Rounds

Exponent is perfect if you want to simulate real FAANG-style interviews. O have been using Exponent for last 2 to 3 years and really love their free peer to peer Mock interviews.

It’s a great way to practice coding interview problems, system design questions and in general overcome interview fear. Everyone gets 5 free mock interview sessions which is also replenish over time based upon feedback.

In mock interview session you play the role of both interviewer and candidate and both provide huge learning experience. I have learn many tricks by seeing people solve the coding problems I struggle and similarly I found great folks who helped me along the way.

They also offer real mock interview from FAANG engineers which is great if you got a FAANG call and preparing for it.

In fact, if you are going for Google, Meta or Amazon interview, I highly recommend you go through one of their real mock interviews, its the best investment you can make for your FAANG dream job.

Special Offer: They’re currently running a 70% discount on their annual plan — a fantastic deal if you want personalized interview feedback.

Here is the link to learn more — Join Exponent with 70% Discount

In short, one of the best place for coding mock interviews.

Why ByteByteGo Stands Out?

While all these courses are excellent, ByteByteGo earns my premium pick for three reasons:

Visual-First Learning — They have the best visual diagrams on all the topics on System Design which make even the most complex systems easy to understand.
Constant Updates — The platform keeps pace with modern architectures, from microservices to AI integrations. They have now uploaded all the content from their 7 best-selling books on Object Oriented Design, Machine Learning System Design, Gen AI System Design and even Coding patterns and behavioral interviews.
Practical Depth — You’re not just learning theory — you’re exploring real-world production systems. Most of their contents are written by FAANG engineers which have experience at both side of the table.

If budget allows, I suggest starting with ByteByteGo for mastery and pairing it with the likes of AlgoMonster and Exponent to get the practice and AI mock interview for best preparation of FAANG interviews in 2025.

They are now also offering 50% discount on their lifetime plan, which means they are now even more valuable and once you buy their lifetime plan which is just the cost of a couple of years, you won’t need any resources.

Every time you need to prepare for interview or just want to stay up to date you can use the platform.

Here is the link to join — Get 50% discount

And, if you don’t know, they also provide ByteByteGo 101, a collection of 101 coding questions divided on key coding interview patterns like two pointers, fast and slow pointers etc. I am practicing their now almost everyday.

Final Thoughts

After trying more than 30 platforms, I’ve realized that no single resource can prepare you for every part of the interview. The best approach is a blend:

Use ByteByteGo for system design, OOP Design, and ML System Design.
Use AlgoMonster or Educative for DSA mastery.
Use DesignGurus for advanced case studies.
Practice on LeetCode, and get feedback through Exponent.

If you’re starting out in 2025, take advantage of the massive discount wave — most platforms rarely offer such deep lifetime or annual plan discounts. Investing in your interview prep today could easily pay off in your next tech job.

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P. S. — If you just want to do one thing at this moment, go join ByteByteGo and start learning System Design and Coding Interview concepts, you will thank me later. The FAANG dream job you always wanted is not far anymore.

System Design · Coding · Behavioral · Machine Learning Interviews

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