10 Timeless Data Structures and Algorithms Courses for Software Engineers and Developers

My favorite online courses to learn Data Structures and Algorithms in depth

image_credit — an example of Trie (Educative)

Hello guys, Data Structures and Algorithms are among the most essential topics for programmers, and if you want to learn them in 2026, you have come to the right place.

The best thing about them is that they never get out-of-date, and any investment you make in terms of time and money will pay rich dividends for a long time.

I have also found that people good at algorithms and data structures are often a better programmers than others.

They tend to improve your programming skills and coding sense, and that’s the main reason I suggest all kinds of programmers, from junior to senior, to spend some time revising, refreshing, and honing their data structure and algorithm skills.

Most of us first heard about them in school and college, but didn’t understand at that time. At least I can say that to me. I first heard about the array and linked list of my engineering college.

That time I didn’t know what is the real use of an array and a linked list because most of the questions we faced were based on theoretical knowledge without any practical application.

For example, the difference between an array and a linked list was a sure-shot question to appear in the exam, and just mugging the answer was enough to score well.

It may be possible that you might have learned them better yourself in your college and school, but that’s a general pattern.

I first realized the real use of arrays when I was writing games for mobile devices in my first company. I was tasked to write a board game, and then I found that I could use a two-dimensional array as a board and just store 1 or 0 to indicate whether a particular place is occupied or not.

That was my first real-world experience with a data structure and how they play roles in real-world applications.

I know it came quite late, and I was lucky to find my way without knowing much about data structure, algorithms, and programming in general, but that was the thing of the past.

Nowadays, the environment has become very competitive, and you just can’t afford to miss these critical concepts. You also need to be more proactive with your learning than the past generation was.

If you are one of them and actively looking to learn algorithms and data structures and looking for some excellent courses to start your journey, then you have come to the right place.

In this article, I am going to share some of the best data structure and algorithm courses for Java, Python, and JavaScript developers.

10 Best Data Structures and Algorithms Courses for Programmers in 2026

When I published my list of free data structure courses on Java, many of my readers were asking me about data structure and algorithms courses on various programming languages, mostly in Java, Python, and JavaScript.

I told them that data structure and algorithms are general programming concepts, and once you are familiar with concepts, you can work in any language, but with my little interaction with them, I realized that people know more about a programming language like Java or Python than a data structure like a linked list or a binary tree.

That’s why it works best for them if data structures and algorithms are explained and implemented in the language they know better. That makes sense to me, and that’s why I have included data structure and algorithm courses on these three programming languages.

But, even if you don’t use those languages, you can still benefit from these courses because ultimately, data structure and algorithms are generic, and they are just concepts that can be implemented in any language.

Anyway, here are the best courses to learn Data Structure and Algorithms in 2026

1. Data Structures and Algorithms: Deep Dive Using Java

This is one of the most comprehensive courses on data structures and algorithms using Java.

It provides an excellent and straightforward guide to implement the most up-to-date algorithms from scratch: arrays, linked lists, graph algorithms, and sorting, etc.

You will also learn about binary trees, balanced trees like AVL trees and Red-black trees, heaps, including heapsort algorithm, and associative arrays and dictionaries.

If you are a Java developer and are looking for an excellent data structure and algorithm course, then you should join this. It’s comprehensive, but at the same time, both exciting and challenging.

Here is the link to sign up for this course — Data Structures and Algorithms: Deep Dive Using Java

2. AlgoMonster (Best for Learning Coding Patterns)

If you are looking for a structured way to prepare for coding interviews and also learn Data Structures and Algorithms, then AlgoMonster is a great place to start.

AlgoMonster is designed by a group of Google engineers who have gone through the tiring process of preparing countless coding problems and solving LeetCode. Learning from their experience, they thought to simply the process and come up with AlgoMonster.

It is structured in such a way that you learn 20% of things that are 80% important. Instead of solving 100 coding questions, you learn patterns behind them, which can also be used to solve any unknown question.

The site is also very interactive and allows you to practice coding online. It also has many quizzes and tests to check your knowledge, and some of them are even free.

Though for the full benefit of AlgoMonster, I recommend you take the paid plan, which is also very affordable, with over $6 per month on an annual plan. The lifetime membership also just costs $190, which is amazing, and everybody can afford it.

Here is the link to join AlgoMonster — 77% discount on AlgoMonster

3. Master the Coding Interview: Data Structures + Algorithms [ZTM]

This is probably the best coding interview course for programmers and developers. Though no programming language is required, if you don’t know JavaScript, the author, Andrei Neagoie, still makes it easy to understand.

In this course, you will learn how to analyze algorithms like searching, sorting, and other algorithms.

You will also learn how to reduce the code complexity from one Big-O level to another level, an important skill to impress the interviewer. Furthermore, you will learn different types of Data Structure and how to choose the right data structure to solve a problem.

Remember, a carefully chosen data structure can drastically improve the CPU and Memory profile of an application. For example, using a set to solve the duplicate elements problem makes it a lot easier. You will also learn how to find Big-O for every data structure.

By the end, you will be able to write code that runs faster and use low memory. You will also learn how to analyze problems using Dynamic programming, a technique many programmers forget to prepare.

Here is the link to learn more about this course — Master the Coding Interview: Data Structures + Algorithms

Btw, you would need a ZTM membership to watch this course, which costs around $39 per month, but also provides access to many super engaging and useful courses like his Python Bootcamp course and his JavaScript Web Projects: 20 Projects to Build Your Portfolio course. You can also use my code FRIENDS10 to get a 10% discount on any subscription you choose.

This is an ideal course for all levels of programmers, particularly JavaScript and Web developers.

Btw, if you are looking for a good programming/coding interview course in Java, then you can also check Data Structures and Algorithms: Deep Dive Using Java by Tim Buchalaka. You can use it to start from scratch or just refresh your knowledge before going to an interview.

4. Grokking Coding Interview Patterns in Java (Educative.io)

This is another good interview refresher kind of course for anyone preparing for coding interviews. Unlike previous courses that focus on concrete problems, this course focuses on underlying patterns.

Once you know the pattern, you can literally solve 10s of coding problems based upon that pattern.

This means instead of solving hundreds of Leetcode coding problems. You can just master these 15 underlying patterns to interview questions, and you’ll be able to tackle anything you face in the interview.

1. Sliding Windows

2. Two Pointers

3. Fast and Slow Pointers

4. Merge Intervals,

5. Cyclic Sort,

6. Top K elements

This would save a lot of time, and if you have a coding interview coming up next week, this is the course you should join.

Here is the link to learn more about this course — Grokking Coding Interview Patterns in Java

In general, all the courses that have “grokking” before them on Educative are exceptionally well put together! These courses magically condense 3 years of CS into short bite-size courses and lectures (I have tried System Design, Object-Oriented Design, and Coding patterns).

The Grokking courses are really great for preparing for an interview, and I recommend all three Grokking courses on Educative. I mean this one, Grokking the System Design Interview, and Grokking the Object-Oriented Design Interview.

---

5. JavaScript Algorithms and Data Structures Masterclass (Udemy)

This is one of the best courses to learn Data Structures and Algorithms in JavaScript, and seriously, you won’t find a better course at such a ridiculous price.

I bought this course for just $10 on Udemy’s flash sales, which happen every month, and I am amazed by its quality. The reason I bought this course is because of Colt Steele; he is one of the best instructors on Udemy, and his classes are just awesome.

Having attended his course, The Web Developer Bootcamp, I was sure of the quality, and when I saw he had covered Data Structure and Algorithms, I couldn’t resist myself from buying this course.

As Colt Steele mentioned, this course crams months of computer science and interview prep material into 20 hours of content, which has helped his bootcamp students ace interviews at big tech companies like Google, Tesla, Amazon, and Facebook.

Here is the link to learn more about this course — JavaScript Algorithms and Data Structures Masterclass

The course not only covers basic data structures like an array, linked list, and binary tree, but also includes “advanced topics” like Heaps, Graphs, and Dijkstra’s Shortest Path Algorithm.

You will not only learn about data structure but also about how to analyze your code’s time and space complexity using Big O notation and techniques to reduce them by making a space-time trade-off.

The course also covers the ins and outs of Recursion, a vital technique to solve many linked list and binary tree-based questions. You will also learn techniques to solve difficult coding problems you might see for the first time. In short, one of the best courses to learn data structure and algorithms in JavaScript.

---

6. Learning Data Structure and Algorithms in Python from Scratch

This is the best data structure and algorithm course I have come across for a Python developer.

It covers both basic and advanced data structures like Arrays, Linked Lists, Trees, Hashtables, Stacks, Queues, Heaps, Sort algorithms like QuickSort, MergeSort, and Insertion sort, and Search algorithms like linear and binary search.

The course also covers some of the advanced algorithms like shortest path algorithms, Dijkstra’s algorithm, Bellman-Ford algorithm, Kruskal algorithm, spanning trees, etc.

The sorting algorithm, it covers basic ones like the bubble sort, selection sort, and insertion sort, along with quicksort and the merge sort. It also includes non-comparison-based sorting algorithms like Counting sort and Radix sort.

All the code examples and problems are implemented using the Python programming language, so that you don’t have any difficulty in understanding how to apply them on your own.

Here is the link to learn more about this course — Algorithms and Data Structures in Python

7. Algorithms and Data Structures — Part 1 and 2 (Coursera)

Being a Java developer, I am a little bit biased to include more data structures and algorithm courses than any other language.

Another reason is that I have spent most of my time coding in Java, so I have just attended a lot more courses in Java than in JavaScript or Python.

This one is another impressive course to learn data structure and algorithms, which I have attended and found suitable. In this course, you will learn about the core data structures and algorithms used in everyday applications.

Here is the link to learn more about this course — Algorithms and Data Structures — Part 1 and 2

You will learn about the trade-offs involved with choosing each data structure, along with traversal, retrieval, and update algorithms.

This is part 1 of a two-part series of courses covering algorithms and data structures. In the second part of the course, you will learn linked lists, stacks, queues, binary trees, and hash tables. I suggest you go through both pieces to understand both basic and advanced data structures.

8. From 0 to 1: Data Structures & Algorithms in Java

As the name suggests, this course is for beginners and takes you from 0 to 1. The course is delivered by a team of instructors with tons of experience at Google, Microsoft, and Flipkart.

The best thing about the course is that it’s an animated, visual, and spatial way to learn data structures and algorithms, which many beginners will find both interesting and more comfortable.

I have seen many programmers struggle to pick topics like recursion, data structure, and algorithms because they can’t visualize what’s happening; this course helps to solve that problem by using technology and creativity.

If you are a beginner and having a hard time understanding data structure, algorithms, and recursion, then this is the perfect course for you.

Here is the link to learn more about this course —From 0 to 1: Data Structures & Algorithms in Java

9. The Last Algorithms Course You’ll Need on Frontend Masters

If you are looking for a high-quality online course to learn Algorithms in depth, then you will love this Algorithm course from Frontend Masters, one of my favorite platforms for learning anything related to web development, including DSA.

This course is created by ThePrimeagen, a Netflix engineer, so you will learn from people who are smart enough to get into Netflix, known for its tough interview and testing candidates on data structures and algorithms

This course is delivered in TypeScript, one of my favorite new programming languages, and it covers not just algorithms and Big(O) notation but also key data structures like Array, String, Hash table, LinkedList, Graph, Stack, Queue, and many others.

When it comes to production quality, Frontmaster is one of the best, and this course is no different. If you want to learn data structures from a Netflix engineer, then this course is for you.

Here is the link to join this course — The Last Algorithms Course You’ll Need

10. Grokking Dynamic Programming Patterns for Coding Interviews by DesignGuru

Dynamic programming is one of the toughest parts of learning Data Structure and Algorithms, and it is also the reason why many programmers fail on their coding interview test.

I was also struggling with DP, even though I had a fair idea of it, but when it comes to solving problems, I always get stuck, and that’s when I landed upon this course. This one is created by DesignGuru, the original creator of Grokking the System Design Interview course.

In this course, they will teach you 5 Dynamic programming patterns, like knapsack, which can be used to solve more than 35 DP-based coding problems. Starting with recursive brute force ways, you slowly learn advanced techniques to break the DP problem and solve it in parts and combine them later.

Another great thing about this course is that practice problems are well researched and chosen in such a way that it covers the popular Dynamic programming questions that have been asked in interviews, which makes it one of the best resources to learn DP.

Here is the link to join this course — Grokking Dynamic Programming Patterns for Coding Interviews

And, if you like these Grokking interview courses from DesignGuru, you can also get all of them for a big discount by purchasing their All course bundle. This bundle includes their most popular Grokking courses like Grokking System Design Interview, OOP Design, Coding Patterns, as well as Grokking Dynamic Programming Interview. You can also use code GURU to get 30% discount.

---

11. DSA Coding Problems on Codemia.io (BONUS)

A lot of people know that Codemia is LeetCode for System Design, but not many people know that they have also added DSA (Data structures and algorithms) coding problems on their website, and this is much, much better than LeetCode.

Not only are the problems nicely divided into easy, medium, and hard, but also on Data structures like arrays, strings, and hashtable but you will also find advanced coding problems on backtracking, dynamic programming, and greedy algorithms.

They not just share the solution but a complete platform where you can practice. Each problem also comes with a hint and pattern recognition, and then the solution in all major programming languages like Java, C++, JavaScript, Python, and more.

I highly recommend combining codemia.io with any of these video courses on DSA to master data structures and algorithms for interviews. It’s the practice where you learn the most.

Here is the link to join — explore all DSA problems on codemia.io

And right now, they’re offering an unbeatable 65% OFF lifetime plan — which makes this the perfect time to level up your skills.

That’s all about some of the best courses to learn Data Structure and Algorithms in 2026. I have included courses for both Java and Python Programmers, but as I have said before, data structures and algorithms are language-independent topics.

Once you know how a particular data structure or algorithm works, you can implement it in any programming language of your choice.

Also, here is a nice Big O notation cheat sheet from DesignGuru.io to quickly revise important numbers for any data structure and algorithms

Thanks for reading this article so far. If you like these data structures and algorithm courses, then please share them with your friends and colleagues. If you have any questions or feedback, please drop a note.

And, if you like to watch videos, then here are the YouTube videos where you can find online courses to learn Data structures and algorithms, both free and best.

And here are free Data structures tutorials and a few Dynamic programming courses, which is a hard topic to master but equally important for interviews:

P. S. — If you are looking for some free courses and books to learn Data Structure and Algorithms, then you can also check out this list of free Data Structure courses and books on Medium.