I Tried 50+ Coding Interview Courses on Udemy: Here Are My Top 6 Recommendations for 2026

Top 5 Coding Interview Preparation Courses for Beginners and Experienced Developers

Hello guys, bonus season is done and dusted for almost all the companies and we are now in second half of the year, the best time to look for jobs as if you join this time, you will not miss bonuses on your new companies.

If you are also looking for new jobs and preparing for coding interviews and need resources to sharpen your coding, data structure and algorithms, and System design skills then you have come to the right place

In the past, I have shared best DSA books and Courses, best System Design books and courses, and in this article, I am going to share best coding interview prep courses for Software engineers, Java developers and other IT professionals.

Unlike normal data structure and algorithms courses, these courses are especially designed you to prepare for coding interviews.

Which means you will not just learn about data structures and algorithms but also about coding patterns and techniques to solve coding problems in a limited time during live interviews.

They are good resource not just for beginners and freshers software engineers who doesn’t know much about what can be asked on Coding interview but also for experienced developer who have lost touch of DSA basics, System design basics and haven’t practice on Leetcode or solving coding problems lately.

You can join these courses to sharpen your skills and revise key computer science, coding, DSA, and System design concepts before interviews.

They are also created by experts like Andrew Negaoie, Colt Steele, Scoot Barett, Stephen Grider, and quite affordable, you can buy all of these courses on just $50 on Udemy sale which is happening now, which is like a steal.

While I prefer to prepare from multiple courses because learning form different instructor works for but if you just want to join one course, I would recommend you to join the Master the Coding Interview: Data Structures + Algorithms by Andrei Negaoie and ZTM academy.

This is one of the comprehensive, well designed and updated course for coding interview preparation and works for both FAANG, Investment banks and other service and product based companies.

6 Best Coding Interview Courses on Udemy in 2026

Without any further ado, here is my list of curated courses for coding interview preparation. All of these courses are curated from Udemy because I found Udemy as the most affordable place to learn anything.

I have only selected the course where I can connect with the instructor and find his teaching style good enough.

Since I am an experienced Java developer, few courses are may be bit advance for beginners but if you stick around, you will learn a lot and improve your DSA skills significantly.

So, let’s start with the first course for your next coding interview preparation in 2026

1. Master the Coding Interview: Data Structures + Algorithms

This is 19.5 hour long, bootcamp style course is one of the best course to start preparing for your next coding interview. The course is designed to cover all essential data structures and algorithms for coding interviews.

You will not only learn about arrays, linked list, binary tree, graphs, stack, queue, and hash table, but also about various searching and sorting algorithms and BigO notation, which is key to calculate the performance for a given solution or algorithms.

The course not just covers about DSA part but also share common questions asked on Google, Microsoft, Amazon and Meta to give you idea about what you can expect on FAANG interviews.

By the way, if you are preparing for FAANG interviews, you can also check his Master the Coding Interview: Big Tech (FAANG) Interviews course where he talk more about how to crack interviews on FAANG or MAANG companies.

By the way, the course doesn’t end here but also give you tips on how to negotiate your offer because that’s most important step, you can easily get 20 to 30% hike right there if you negotiate well, which could take years otherwise, and I am not saying from the course perspective but form my own experience.

Overall one of the best coding interview prep course you can join online for an affordable price. Talking about social proof, more than 221,098 people have already joined this course and it has on average 4.7 rating which is amazing.

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

The course also make great use of new feature on Udemy like coding exercises which allows you to practice solving coding interview problems right on your browser, this makes practice really easy as it take away all the friction related to downloading Software and setting up your IDE for practice.

2. Java Data Structures & Algorithms + LEETCODE Exercises

If you are an experienced Java developer looking for a job change but worrying about how to crack the coding interview round, particularly the live coding interview then this course is for you.

In this course, you will prepare for coding interview by not just learning and revising your data structure skills but also by solving LeetCode problems in Java.

Created by Scoot Barett, the course come with 100+ Coding Exercises with Detailed Explanations, this will help you to learn data structure and algorithms faster You will also learn how to use Big O notation to calculate time and space complexity of your solution.

Scott also make good use of animation to explain the complex data structure and algorithms concept, which really work well for beginners and fresh graduates coming out from colleges.

Talking about social proof, more than 44,759 students have already joined this course and it still have 4.7 rating which is phenomenal. If you are a Java developer who want to crack your next coding interview, you should check out this course.

Here is the link to join this course — — Java Data Structures & Algorithms + LEETCODE Exercises

3. The Coding Interview Bootcamp: Algorithms + Data Structures

If you are looking for a coding interview prep course for experienced web developer then this course is for your. Created by one of my favorite Udemy instructor and web developer, Stephen Grider, this 13 hour course is a great resource for web developers.

This is like a crash course on coding interview, where the focus is on solving coding problem, which makes it an ideal course for experienced developers.

In this course, you will master commonly asked interview questions and tackle common data structures used in web development. You will also practice dozens of different challenges on 30+ coding exercises.

Most importantly, you will use Javascript to solve challenging algorithms and coding problems and that’s why I recommend this course to web developers who already knows JavaScript well.

Talking about social proof, more than 102,191 students have already joined this course and it still have 4.7 rating out of 5, which is seriously amazing.

Not many courses can sustain that high level of rating for so many students unless they have real high quality content which this course has.

Here is the link to join this course — — The Coding Interview Bootcamp: Algorithms + Data Structures

4. LEETCODE In Python: Algorithms Coding Interview Questions

So far, I have shared coding interview prep courses for both Java and JavaScript developers but what about Python programmers? Python is one of the the top three programming language and also a good choice for solving coding problem on interviews.

Created by an ex Google engineer, Bit Punch, this course will give you ample opportunity to practice data structure and algorithms questions for interviews at FAANG companies like Google, Facebook, Apple & Amazon.

In this 29 hour long coding interview course for python developers you will solve easy to hard Difficulty problems using different data structures and algorithms. It also covers the most popular interview questions asked by major tech companies

Along the way, you will also learn essential coding interview pattern like two pointers, sliding window and merge interval which can be used to solved 100s of Leetcode problems.

Talking about social proof, more than 18,436 student have already joined this course and it has on average 4.6 rating which is great.

You will greatly improve your problem solving skills by going through this course and that’s why I highly recommend this course to python developers preparing for coding interviews in 2026.

Here is the link to join this course — LEETCODE In Python: Algorithms Coding Interview Questions

5. Data Structures Algorithm DSA | Python + JavaScript LEETCODE

While I have already mentioned one Python and one JavaScript course which also deals with Leetcode problems, if you need and alternative, you can take a look at this course.

Created by Jackson Kalith, this is one of the most comprehensive coding interview prep course with 39 hour of content In this course you will not only learn common Data Structures such as Arrays, Hash Table, Linked List, Binary trees, Graphs but also solve real Coding Interview Questions from Google, Meta, Amazon, Netflix , and Microsoft etc.

The course is divided into a structure to prepare you for coding interviews in 25 days. It’s like a 25 days coding interview bootcamp to master DSA, BigO, Coding Interview Patterns Python JavaScript and get the job you want!

More than 58,484 students have joined already and on average it has got 4.5 rating which is quite nice. If you need more detailed preparation and want to solve problems, particularly real coding problems from Google and Amazon then you can join this course.

Here is the link to join this course — — Data Structures Algorithm DSA | Python + JavaScript LEETCODE

6. JavaScript Algorithms and Data Structures Masterclass

This is another DSA and coding interview course for JavaScript and web developers. Created by legendary instructor Colt Steele, this course should be the very first course beginners should join to learn about common data structures like array, linked list, binary tree, stack and queue.

This 21.5 hours aim to fell the gaps of what you learn in colleges and what is expected on real technical job.

By teaching you common data structures and algorithms and solving coding problem the course aims to improve your problem solving skills.

In this course, you will also learn everything you need to ace difficult coding interviews, including 6 sorting algorithms and learn to implement 10+ data structures from scratch.

While this is a beginner level course, 2 to 3 years experienced web developer can also join this course to improve their problem solving skills and become a stronger developer.

Here is the link to join this course — — JavaScript Algorithms and Data Structures Masterclass

That’s all about the best Coding interview courses on Udemy in 2026. Coding interview is very vast topic and that’s why one course is not enough. I normally join multiple courses from different instructor to understand the topic better.

You can also join a couple of courses from this list to learn about data structures, algorithms, and everything else you will need to crack the Coding interviews in 2026.

All these courses are also very affordable and you can enroll them now for just $10 on Udemy sale. Even if you are busy and don’t have enough time to watch these courses, you can join them now for a lower price and watch them later when you have time.

I do the same and I have already bought 50+ courses on this sale as of now as these sales are now happening less frequently and far between.

By the way, 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.

Other DSA and Coding interview resources you may like

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

P. S. — If you need an alternative to Udemy coding interview courses then you can also join ByteByteGo and start learning System Design and Coding Interview concepts, you will thank me later. Make it a goal for the new year and you will surely be a better Software Engineer.

System Design · Coding · Behavioral · Machine Learning Interviews

Everything you need to take your system design skill to the next level

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I Tried 30+ Python and Data Science course on Datacamp - Here Are My Top 10 Recommendations for 2026

10 Best Datacamp Courses to learn Python and Data Science

Hello guys, if you are looking for the best and free Datacamp courses to learn Python and SQL and become a Data Scientist in 2026, then you have come to the right place. In the past, I have shared the best udemy courses to learn Python and the best courses for data science.

In this article, I will share both free and best Datacamp courses for Python developers and Data Science learners. Yes, you read it write, Datacamp also offers free courses and they are quality courses which you can take to learn at the skill on your own.

If you don’t know, Datacamp is a great platform to learn Data skills, and it has the best courses to learn Data skills like SQL, Data Science, and Python. They also have data certifications which can be used to learn key skills like Data Analysis and Data Engineering.

They are like CodeCademy for Data skills. They have interactive lessons, quizzes, video lectures, and creative exercises to teach key data skills, and that’s why it’s one of the best places to learn Python and SQL for data science.

Data science is a big field where the student needs to have many programming languages like python language and R.

Also, he needs to learn math and statistics, and they are mandatory to be a data scientist and maybe need to learn machine learning and deep learning to make predictions and all of these skills can be learned from one place called DataCamp.

Data nowadays is the core that keeps companies running and makes decisions based on the analysis of these data. This is the role of a data scientist. The DataCamp platform helps companies and individuals deal and work with data using many different tools and apply machine learning algorithms to these data.

8 Free Datacamp Courses to Learn Python, SQL, R, and Data Science in 2026

Here is my list of best Datacamp courses people can take to learn essential tech skills like Python and SQL and become Data scientists in 2026. There is a lot of demand for Data Scientists and Backend engineers with Python and SQL, and these Datacamp courses will teach you those from scratch.

From my 20 years of experience in tech, I can say that learning Python and SQL is the best decision of your life; unlike many frameworks and programming languages, Python and SQL have been around for more than 25 years, and there is still a great demand for them. Learning them is a good investment for life.

1. Introduction to Python [Free Course]

Python programming language is the language of the future since it is used in too many different industries like web development with Flask and Django frameworks also in data visualization with matplotlib library.

It also covers artificial intelligence using Tensorflow and Pytorch frameworks and Datacamp has created a course for learning this language from the beginning by understanding first the basics of this language like variables and data types, python lists, then moving to functions and importing packages, and finally, working with arrays using NumPy.

The best thing about this Datacamp course is that it's free, all chapters are free and you can access them by creating a free account.

Here is the link to join this free Python course — Introduction to Python

2. Introduction to SQL [Free Course]

If you are looking to be a database administrator or a data scientist, or even a web developer, then you need to learn the SQL language, which is the language that is used to communicate with the database and extract and filter the data to use it.

Datacamp has created an entire course teaching you the structure of the database and how to perform simple SQL queries, learn how to use comparison operators, use the aggregator functions, and finally, sort and group your results.

This is also one of the best free courses from Datacamp and if you are looking for free resources to learn SQL then you should check out this highly engaging SQL course on Datacamp.

Here is the link to join this course — . Introduction to SQL

3. Introduction to R [Free Course]

This is another free course from Datacamp to learn the R programming language for beginners.

Data scientists need to learn maths and statistics to work with data and perform analysis, so alongside learning python, they also need to learn the R language, which is considered easy to learn like python but used a lot in the statistics field and analysis and data visualization.

DataCamp offers a course in the R language, starting by learning the basics like arithmetic and variables and vectors, then learning metrics and performing computation with them, and more.

Here is the link to join this course — Introduction to R

free Course to learn R programming on Datacamp

4. Introduction to Tableau [Free Datacamp Course]

Tableau is a widely used software among companies such as Amazon to analyze their data, get insight for decision-making, and share the workbook between the team inside the company. You will learn first to import your data inside the software and its interface.

You will start the visualization process and customize them like slicing and dicing your data with filters. You will also explore how to visualize geographical data.

Finally, learn best practices to tell the story about your data and share your insight.

Here is the link to join this course for FREE — Introduction to Tableau

best free Datacamp course to learn Tableau

5. Data Analysis in Excel [Free Course]

Excel spreadsheet is a software developed by Microsoft.M. M. Most people think they are just used to store data and apply some easy functions. Companies are using this software to analyze big data and more.

You will start learning about the data analysis process and exploring the Excel interface. You will learn to sort the tables and nesting functions and learn about cleaning your data using a variety of functions and apply all of what you’ve learned to a real dataset.

Here is the link to join this course for FREE — Data Analysis in Excel

best free Datacamp course to learn Data Analysis

6. Introduction to Power BI [Free]

Another alternative for Tableau software that companies use is Power BI, which Microsoft developed and owned and can give you excellent visual analytics capabilities.

You will first discover the interface, start loading your dataset, and build a data model to understand the relationship between your tables and create some graphs.

Then you will move to create more complex visualizations and customize them. Finally, make customized calculations using DAX, which is a Microsoft formula language.

Here is the link to join this course for FREE — Introduction to Power BI

best free Datacamp course to learn Power BI

7. Introduction to Data Visualization with Matplotlib [FREE]

Python is a good language to learn when you want to visualize your data. There are a dozen of the library to achieve this goal, and matplotlib is one of them.

This course will help you learn to use the matplotlib pyplot interface and create a simple visualization and customize that data appearance.

And you will learn how to visualize your time-series data, which helps you clarify the trends and discover the relationship between them. Finally, learn to visualize the quantitative visualization and share your work with others.

Here is the link to join this course for FREE — Introduction to Data Visualization with Matplotlib

best free Datacamp course to learn Data Visualization with MatPlotLib

8. Introduction to Data Visualization with Seaborn [FREE]

Many available visualization libraries for python language, and another one used a lot for statistical visualization and customization is known as seaborn, which is used a lot among data analysts.

You will learn to create a scatter plot and count and plots using the most capability of seaborn, which is adding a third variable to your plot. Later, you will learn to visualize two quantitative and categorical variables and customize your seaborn plots.

Here is the link to join this free course — Introduction to Data Visualization with Seaborn

best free Datacamp course to learn Data Visualization with Seaborn

All these online courses are free and you can use them to learn Python, SQL, and R. Rest of them are not free because they are very specialized and high-quality courses and you would need a Datacamp subscription to access those courses, but you can always check the first chapter for free by using free Datacamp account.

4 Best Paid Courses to learn Machine Learning and Deep Learning in Datacamp in 2026

So far, we have looked at the free Datacamp course to learn essential data skills like Python, SQL, R programming, Excel, Seaborn, Data Visualization and more but Datacamp also have great in-depth courses which are not free but definitely worth checking.

Here is a list of best Datacamp courses to learn Machine Learning and Deep Learning in depth in 2026:

1. Introduction to Deep Learning in Python

If you want to be an AI engineer or a data scientist, you should definitely learn deep learning used in many fields such as robots, self-driving cars, natural language processing, and more.

DataCamp has created a course that teaches you these skills using the Python language and Keras library, starting with the basics of neural networks and their concepts like the activation function.

Then, it will learn how to optimize your model. Later create a neural network with Keras and evaluate your model.

Here is the link to join this course — Introduction to Deep Learning in Python

2. Introduction to Data Visualization with Matplotlib

Data visualization is where you can convert the data into plots and charts to understand more about your data in one picture. This skill is mandatory if you want to be a data scientist, data analyst, or even an AI engineer.

DataCamp has created a course that teaches you this skill using Python and matplotlib. It starts by understanding the matplotlib interface, creating some plots and customizing them, plotting time-series data and bar charts, and statistical plotting.

Here is the link to join this course — Introduction to Data Visualization with Matplotlib

best Datacamp course to learn Data Visualization

3. Supervised Learning with scikit-learn

In supervised learning, you use labeled data to train your model and make a prediction, so you have to learn machine learning if you are planning to be a data scientist and this course teaches you how to perform this using the sci-kit-learn.

You will also learn how to solve classification problems then move to solve problems with regression. Later, learn how to evaluate your model and improve it.

Here is the link to join this course for FREE — Supervised Learning with scikit-learn

4. Unsupervised Learning in Python

Unsupervised learning is another type of machine learning that you need to learn. Here, the model will analyze and cluster unlabeled datasets and be used in customer segmentation and grouping your data according to its similarity.

DataCamp has created a course on unsupervised learning using the sci-kit-learn and scipy, starting by learning the clustering techniques and applying them to the stock market prices, then learning how to visualize hierarchy and learn the dimension reduction techniques more.

Here is the link to join this course — Unsupervised Learning in Python

By the way, you would need a Datacamp account to access this course. Creating a Datacamp account is free for learners and you also get free access to all of their 350+ courses first chapter.

It also comes with 7 projects but for the best learning experience, I recommend their personal plan which you can get for just $25 per month. This gives access to all of their courses and projects as well as certifications.

Note — They are also offering a whopping 63% discount now, you can take advantage of that to level up and learn in-demand Data Skills in 2026

That’s all about the best and free Datacamp courses to learn Python, Data Science and other in-demand Data skills in 2026. Whether you are a university student learning Python, SQL, and Data science or just an amateur who wants to learn this field through online courses and get certified, the certificate of DataCamp is 100% worth it.

You can include them in your resume if you are looking for a job. They are also very engaging and hands-on to learn these in-demand essential skills. I highly recommend Datacamp to anyone learning Python, Data Science, or SQL.

Other Python Articles and tutorials you may like:

Thanks for reading this article so far. If you find these best Python, SQL, and Data science training courses from DataCamp useful, please share them with your friends and colleagues. If you have any questions or feedback, then please drop a note.

P. S. — If you are looking for a free Datacamp course to learn Data Science, I suggest you check out Data Science for Everyone, a free course from Datacamp that provides an introduction to Data Science without any coding headache. Great for beginners and experienced people who want to learn Data Science in 2026

10 Free Data Science Online Courses for Beginners to Join in 2026

Collection of best free Data Science online courses for beginners from Udemy, Coursera, Datacamp, freeCodeCamp, and…

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