10 Best Software Design, OOP Design, and API Design Interview Courses in 2025

Hello guys, if you are preparing for Software Design Interviews and looking for best resources then you have come to the right place. Earlier, I have shared best System design books, courses, websites, and System design interview questions and in this article, I am going to share in-depth System design courses for developers and engineers.

These are the best online courses to prepare for Software Design Interviews in 2025.  If you have been doing Software development then you know that System design is one of the most important skill for developers and managers.

Both System Design and Software Design are not just a tool to pass interviews but it's the way we build modern Software and that's why a good knowledge of System design is required to become a better Software Engineer. 

This is also one of the reason why big tech companies like Google, Microsoft, Apple, Amazon and Facebook put so much emphasis on System design interview. If you are also preparing for Software design interview and looking for resources then you have come to the right place. 

But, before we get to the 10 best Software design courses that will teach you everything you need to know about system design, let me tell you a little bit about what it really is.

Software design is basically the process of defining elements of a system including modules, architecture, components, interface, and data for a system based on a specific set of requirements. 

It can also refer to the process of defining, developing, and designing systems. These designs have to satisfy the specific needs of a company or an organization. In a coding interview, you have to be prepared to answer a wide range of questions.

From your typical data structures and algorithms questions to system design, the possibilities are seemingly endless.

But, for experienced developers, chances are your interviewer won't hammer you with algorithms or data structures (but expect a few).

Instead, they'll focus on things that test your understanding of software design, and how capable you are at finding optimized solutions to common problems. These questions typically include rewriting code for repeated problems, how you would manage code in large teams, and best practices for organizing large chunks of code. 

By the way, when it comes to learn System design and preparing for interviews, DesignGurus.io and Educative are the probably the best platforms out there. I really liked all of their Grokking courses on System design, OOP Design, and Dynamic programming, you will find many of them in this article. 

They also have great resources like this System design Interview cheat sheet which is worth printing and keeping it close. 

At the end of this article, I am also going to share share another great visual, a System Design Template form DesignGuru.io, another great website to learn System design so make sure you read till the end.  Now, let's dive into best System design, Software design and OOP design courses from Educative.io

10 Best Software Design and OOP Design Interview Courses for 2025

As a Software Engineer, you have to make use of all the different modeling languages for expressing the information and knowledge in the structure of a system.

This system has to be defined by a consistent set of rules and definitions. It can also be defined in textual or graphical modeling languages.

There are different kinds of graphical modeling languages like the Unified Modeling Language, UML, Flowchart, Business Process Modeling Notation, and Systems Modeling Language. There are also different types of design methods that you can make use of. They include Architectural Design, Logical Design, and Physical Design.

Learning about Microservices can also help in System Design Interviews, particularly when you need to address the concepts of single responsibility and separation of concerns.

Here we have compiled a list of the 10  best Educative courses for system design and object-oriented design. Keep reading to find out more.

1. Grokking Modern System Design For Software Engineers And Managers

This is one of the newest System design course on Educative and this reflect all the hard work and experience they gained by created a couple of best System design courses you will find online.

As System design best practices have evolved the expertise required to design and build these systems have evolved and that's where this course will help you. 

It share most modern and up-to-date System design best practices you will find online.

Course Duration: 2 hours

Course Rating: 4.5 stars out of 5

Course Instructor: Educative

Course Price: $14 per month

This course starts with teaching you first the fundamental building blocks. From there, you will learn u how to combine those building blocks to design and deploy scalable services through real-world examples.

After completing this course, you will have the skills to build novel solutions to the most complex problems in modern software engineering. Here are key things you will learn in this best System design course 

• Learn 16 fundamental building blocks of modern system design (like Blob Store, Key Value Store, etc.)
• Learn and apply the RESHADED approach to system design
• Unpack (and be able to design) some of the world’s most innovative scalable systems (including YouTube, WhatsApp, Uber, and Twitter)
• Apply that design mastery to create novel solutions for emerging problems by creating your own distributed systems
• Learn how to take on the system design interview and level up your career

No matter where your career takes you, system design will remain a cornerstone of modern software engineering. Team managers and product managers will architect scalable solutions, leveraging big data stores, user interaction, and distributed microservices. 

Meanwhile, developers will implement those designs by linking the building blocks together. System design isn't going anywhere, so everyone in the world of software engineering needs to develop a working knowledge of system design.

The course will act as a great brief introduction to the amazing world of modern system design. It is perfect for beginners as you will learn about system design from absolute scratch. You will learn exactly what system design is and why is it used. 

Here is the link to join this course - Grokking Modern System Design For Software Engineers

2. Grokking The System Design Interview [DesignGurus.io]

This  was the first course I joined on Educative.io a couple of years back to learn about System design for coding interviews.

At that time, there wasn't many System design and I was like on cloud nine to discover this gem but this course is now only available on DesignGuru.io because creator of this course Arslan Ahmed has moved this course to on his on portal. 

This was also one of the most popular course on Educative platform and must have for any one serious about cracking System design course. One time half of Educative.io's course revenue was generated by this single course, yes it was that popular at that time. 

This course by Design Gurus, author of Grokking the System design book, one of the popular book on Amazon on System design and helped more than 60,000 people to crack their system design interview (SDI).

Course Duration: 3 hours

Course Rating: 4.6 stars out of 5

Course Instructor: DesignGurus.io

Course Price: $14.33 per month

In this course, you will not only practice popular System design questions like how to design YouTube, how to design WhatsApp, how to design Traffic Light system etc but also learn essential System design concepts which are key to solve many problems.

Here are key Software design concepts you will learn in this course:

1. Load Balancing

2. Caching

3. Data Partitioning

4. Indexes

5. Proxies

6. Redundancy and Replication

7. SQL vs. NoSQL

8. Distributed Systems

9. CAP Theorem

10.Consistent Hashing

This wonderful course that will teach you everything you need to know about system designing along with grokking from absolute scratch. In this way, it is absolutely perfect for complete beginners. It is a perfect starting guide for beginners looking to enter the amazing world of system design.  I highly recommend this course for all programmers, irrespective of their level. 

Here is the link to join this course - Grokking The System Design Interview

3. Grokking The Advanced System Design Interview [DesignGurus.io]

This is the second part of DesignGuru's popular Grokking the System Design Interview course. If you are looking for a Software design course to prepare advanced system design interview and learn how to design scalable systems for enterprise-level software then you will love this course.

In this advanced System design course, you will learn about all the core features of advanced system design. You will also become a very advanced system designer.

You will be able to master both system design and Software design such that after completing this course, you will become a better system designer and closer to become a Software architect you always wanted to be.

Designing systems and architecting software are key responsibilities of a senior software engineer. But it’s difficult to master without practice, and few people have the chance to work on large-scale projects from the ground up.

This course solves that problem. In this course, you will dive deep into the most common types of distributed systems like key-value store, distributed messaging and streaming system, distributed file storage systems, and more.

Course Duration: 2 hours

Course Rating: 4.6 stars 

Course Instructor: Design Gurus

Course Price: $14 per month

By using actual use-cases from some of the most famous systems, you will get a look at the architecture the creators had in mind while designing the system.

You will then evaluate various tradeoffs that the original developers had to consider and what prompted them to choose a certain design given their constraints. In the last part of the course, you will also learn about a set of design patterns that are used to solve some of the most common problems in distributed systems.

These are especially handy in system design interviews. I highly recommend this course to all the experienced Java developers. If you have an interview coming up, or you’re interested in software design/architecture, then you should join this course and prepare well. 

Here is the link to join this course -  Grokking The Advanced System Design Interview

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

4. Grokking The Object-Oriented Design Interview [DesignGurus]

This is another great course from DesignGuru.io  that will help you take your skills in object-oriented system design to another level. You will be able to do this by using object-oriented system design rather than the traditional system design techniques. 

Course Duration: 2 hours

Course Rating: 4.4 stars out of 5

Course Instructor: DesignGuru

Course Price: $49

The course will teach you how to pass your system design interview. You will also learn how to get jobs at Google. Facebook, Microsoft, and Amazon.

You will also learn how to solve popular object oriented design problems and learn about key OOP concepts, design principles and patterns to breakdown a real world problem into computer program.

Here are popular OOP design problems which is solved in this course:

1. Parking Lot

2. Library System

3. Amazon clone

4. StackOverFlow clone

5. Design ATM

6. Design Chess

7. Design BlackJack

8. Facebook clone

9. Car Rental System

10. Movie Ticket System

Since OOP design is quite important for Java developers and any other object oriented programming language, I highly recommend this course to both beginners and experienced program who wants to learn OOP Design or want to take their OOP design skill to next level. 

Here is the link to join this course - Grokking The Object-Oriented Design Interview

5. Machine Learning System Design [Educative]

When it comes to your Machine Learning interview prep, you will no doubt find lots of good material around how different machine learning models work, which algorithms to use when, and so on.  But, you’ll be hard-pressed to find information on how to approach a ML problem from a system design perspective.

In a typical Machine Learning interview, especially if you’re more senior, you’ll be given open-ended problems and will be expected to build end-to-end machine learning systems to solve those problems.

System design is arguably the most important part of your ML interview and is a determining factor in your hiring ‘level.’ Companies jump at the chance to hire people that can confidently talk through designing systems and articulate the trade-offs they’re making.

Additionally, as more and more companies inject ML into their products, even if you just want to excel at system design interviews, it’s valuable to speak about ML functionality as more than just a black box. Having that ability is a surefire way to impress your hiring manager.

This is an exciting AI powered course that will teach you everything you need to know about the basics of machine learning system design in the shortest time possible. The course will also teach you everything you need to know about machine learning and system design. 

Course Duration: 1 hour 30 minutes

Course Rating: 4.6 stars out of 5

Course Instructor: Educative.io

Course Price: $14 per month

It also covers the most popular interview questions asked at big tech companies. Instead of answering trivia-style questions, you will work through open-ended problems to design real-world machine learning systems.

Here is the link to join this course - Machine Learning System Design 

6. System Design Interview: Doordash [Educative.io]

If you are looking for a case study based course to learn System design then you will love this System Design Interview course on Educative. 

This course will prepare you for the system design interview by using a case study of DoorDash and familiarize yourself with the challenges you will encounter during the interview.

In this Software design course, you will learn everything you need to know about the different components of system design for getting hired by Doordash. You will start the course by learning about the basics of system design. 

Course Duration: 2 hours

Course Rating: 4.5 stars out of 5

Course Instructor: Partha Pratim Sanyal

Course Price: $14 per month

Then you will move on to understand what exactly is system design. By the end of this course, you will be able to get a very good job at Doordash.  

Here is the link to join this course - System Design Interview: Doordash

7. Grokking The Machine Learning Interview [Educative]

This fantastic course will help you polish your machine learning skills. You will be able to do this by grokking your way to getting a very good machine learning job. 

This course not just cover System design question for Machine Learning but also about general Machine learning concepts like supervised vs unsupervised learning, how to create accurate model, data normalization and analysis and more. 

Course Duration: 1 hour

Course Rating: 4 stars out of 5

Course Instructor: Educative

Course Price: $14 per month

If you are preparing for Machine Learning or Data Science Interview and no clue where to start then you can join this course to start your preparation. It is also a great resource to learn essential Machine Learning concepts and topics which are not just important for Interviews but also to become a better Machine Learning Engineer in 2025.

Here is the link to join this course - Grokking The Machine Learning Interview

8. Grokking the Principles and Practices of Advanced System Design [Educative]

Software architecture is also not something that many developers are exposed to every day. It takes time and effort to learn, often outside of work. That said, if you're interested in growing in your tech career, learning about Software architecture is one of the best investments you can make.

The ability to think about architecture trade-offs and design systems at scale is a key skill that senior engineering managers are expected to have. Having it is a good way to get promoted or increase your salary.

And in the world of architecture, it's hard to have a conversation these days without mentioning Microservice architecture. The idea of microservices might not be new, but it has lately become a preferred way of designing large-scale applications.

In a Microservices architecture, different features are split into separate modules/codebases. They then work in conjunction with each other forming a large service as a whole. This helps with easier and cleaner app maintenance, feature development, testing and deployment in comparison to a monolithic architecture.

This course is also a great stepping stone to the fundamentals of system design. Knowledge of software architecture will prove to be very valuable for beginner developers and those who are actively interviewing (especially full stack developers).

By using this exciting Software architecture and Web architecture course, you will be able to learn the fundamentals of designing in Java. You will also be able to start your amazing journey by making use of this amazing course. 

Here is the link to join this course - Grokking the Principles and Practices of Advanced System Design

9. Software Design Patterns in C [Educative]

This course will act as a great brief introduction to the amazing world of system design in C. It is perfect for beginners as you will learn about the C programming language from absolute scratch. You will learn exactly what C is and why is it used.

The course will teach you everything you need to know about functional and class-based components in C Programming language.  This course also teaches how to use special tricks called "design patterns" when writing programs in C, a type of computer language. 

Even though most books talk about design patterns in other languages like C++ or Java, this course shows you how to use them in C. These patterns are like secret codes that help programmers talk to each other and work together better. 

Course Duration: 2 hours

Course Rating: 4.5 stars out of 5

Course Instructor: Adam Tornhill

Course Price: $20 per month

In the course, you'll learn about different patterns and how to use them in your programs. Each pattern is like a special tool that solves a specific problem. You'll also learn important rules and tips for using these patterns in your C programs.

Here is the link to join this course - Software Design Patterns in C

10. Grokking the API Design Interview [Educative]

This  is an intermediate-level course consisting of 132 lessons totaling 20 hours, culminating in a Certificate of Completion. This course aims to equip learners with a solid understanding of API design principles, enabling them to tackle complex design challenges with confidence. 

Throughout the course,  you will gain foundational knowledge of API design and gain familiarity with advanced-level principles, emphasizing the importance of crafting effective APIs.

By exploring real-world examples such as YouTube, Stripe, and Zoom, you will dissect the intricacies of API design within the broader context of product development. 

Course Duration: 20 hours

Course Rating: 4.6 stars 

Course Instructor: Educative.io

Course Price: $14 per month

Topics covered include network intricacies, client-server communication methods, and common data formats for web APIs. By the course's end, participants will possess the skills necessary to approach API design endeavors with clarity and proficiency, preparing them for success in API design interviews and beyond. 

Overall a great course and one-of-its-kind, you will not find any other course on this topic which is so detailed. I highly recommend this course to every developer. 

Here is the link to join this course -  Grokking the API Design Interview 

Earlier, I have shared a System Design Interview cheat sheet from Educative and now is the time to share another great System Design template from DesignGuru.io, one of my favorite platform to prepare for Coding interviews, including System Design Interviews. 

That's all about the best Software Design and OOP Design courses for beginners and experienced developers from Educative and DesignGurus in 2025. To be honest, both Educative and Designgurus, are great learning platforms. I found learning from text based course is faster than watching video courses and also Educative allows you to practice coding in browser which really makes learning easy.

 If you liked this list of the 10 best Software design, API Design, and OOP Design courses on Educative.io and DesignGurus.io , feel free to share it with your friends and family. You can also drop a comment if you have any doubts about system design, and we will get back to you as soon as possible. 

By the way, you can either join these system design courses individually or you can take an Educative Unlimited subscription (recommended) to get access to their 350+ high quality, text-based, interactive courses to learn key skills for coding interviews, software development, and technology.  It cost around $14.9 per month on annual plan and its completely worth it. 

Other Programming and Development Resources you may like

• 10 Essential Topics to Prepare for Coding interviews
• 10 Best Educative.io Courses for Programmers
• Top 5 books to become Solution Architect
• Is Grokking the Coding Interview worth it?
• 10 Free Educative Courses for Beginners to learn Programming
• 6 Best Courses to learn Dynamic Programming
• 10 Testing Tools Java Developers Should Know
• Review - Is Grokking the System Design Course worth it
• Review - Is Grokking the Object oriented design worth it?
• Top 5 Courses to Learn Python in 2025
• 5 Courses to Learn Big Data and Apache Spark in Java
• 10 Tools Java Developers uses in their day-to-day work
• 10 Tips to become a better Java Programmer

Thanks for reading this article so far. If you like these best System design , Software design, and object oriented design courses from Educative for both Coding interview and learning then please share with your friends and colleagues. If you have any questions or feedback then please drop a note. 

P. S. - If you are looking free Educative courses to learn in-demand tech skills then don't worry, I have also covered them and shared 20 best free Educative courses earlier, You can check that article to learn Java, Python, JavaScript, Rust, Algorithms, behavioral interview preparation course and much more on Educative.io for free.