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TDD in Action with AI: From Fundamentals to Production (Udemy.com)

Use Test-Driven Development and AI to build Production-Ready Software, with Kotlin & Spock

Created by: Nikos Voulgaris

Last updated March 2026

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What you will learn

  • Build real-world applications from scratch using Test-Driven Development (TDD)
  • Write fast, deterministic, and isolated unit tests that act as both living documentation and a safety net for refactoring
  • Design and test RESTful APIs using the Outside-In TDD methodology
  • Use AI tools to enhance your development workflow and boost productivity — without sacrificing control
  • Master the core principles and techniques of TDD, and apply them confidently in production code

How it compares

Against the other 1,182 rated Udemy courses in IT & Software on CourseDuck:

  • Rating4.9 out of 5higher than 99% of them
  • Reviews25#1,169 of 1,183 by number of reviews
  • Length3.5 hoursshorter than 66% of them
  • Last updatedMarch 2026more recently than 69% of them

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Course Description

Test-Driven Development in Action with AI - Nikos Voulgaris.


Apply Test-Driven Development in real-world software, integrate AI tools into your workflow, and elevate your professional skills.

Does Test-Driven Development sound fun and promising, but feel limited to toy examples like Tic-Tac-Toe or FizzBuzz?

I've been there. It was frustrating to see such a powerful technique presented in ways that felt disconnected from the complexities of real-world software. That's why I created this course - to help software engineers confidently apply TDD in production codebases, and discover its full potential beyond the basics.

In this course, I share the hard-earned lessons from my own journey mastering TDD - distilled into a practical, structured, and accessible format. You'll learn how to build maintainable systems from the ground up, and how to integrate AI tools into your development workflow to move faster without sacrificing control or the benefits of TDD.

By the end of the course, my goal is for you to walk away with real-world, hands-on skills, a deeper understanding of TDD - and hopefully, to have enjoyed the ride.


What You'll Build

Throughout the course, we’ll build a task manager application that exposes a RESTful API. Users will be able to register, create tasks, update task statuses, and retrieve their tasks.

We’ll follow the principles of hexagonal architecture - not dogmatically, but by letting it emerge naturally through our TDD process. To keep things simple, we’ll use in-memory persistence.

Technologies used: Spring Boot, Kotlin, and Spock. No prior in-depth knowledge of these tools is required. The focus isn’t on specific technologies - it’s on mastering the methodology, mindset, and discipline of Test-Driven Development.

You’ll also learn how to thoughtfully integrate AI tools to support (not replace) your decision-making and enhance your TDD workflow.


Why Learn From Me?

I'm a software engineer with over 12 years of professional experience. I started exploring TDD around a decade ago, and have been using it extensively in production for the past 8 years. Along the way, I've helped dozens of engineers adopt TDD through in-person coaching, pair programming, and online workshops.

I know the pitfalls, the resistance, the confusion - and the "aha" moments that make it all click. I created this course to pass those insights on to you.

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Instructor Details

Nikos Voulgaris

I'm a professional software engineer with over 12 years of industry experience. I'm passionate about clean code, software craftsmanship, and building systems that are both elegant and maintainable. I believe strongly in the power of global developer communities, which is why I enjoy sharing knowledge and learning from others.

Teaching on Udemy is my way of giving back to the community that has taught me so much over the years. I strive to teach the way I’ve always wanted to be taught - in a value-driven, practical, and real-world applicable manner.

Over the course of my career, I’ve held roles ranging from Staff Software Engineer to Engineering Manager, working across companies of all sizes - from global organizations like Nokia, to tech-driven scale-ups like Blueground, and fast-paced startups. My work has spanned diverse domains including telecommunications (4G networks), travel, healthcare, and real estate.

Beyond software, I enjoy traveling, experiencing different cultures, reading (especially beyond tech), exploring the world of wine, and more recently, photography.

I occasionally share my thoughts and experiences on software on my personal blog.

Feel free to reach out - I’m always happy to connect.

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Reviews

4.9

25 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Jov Mit on 10/19/2025

Coming from someone who's been practicing TDD for over a decade, this is one of the most comprehensible courses on test-driven development. Nikos did an outstanding job explaining the process of test-driving code as clearly as possible, comparing both TDD styles side by side. I especially like that there is no fluff, and everything is straight to the point. I also admire the introduction of AI into the cycle, so that we learn how to leverage it to become even more efficient. The fact that we constantly adapt and observe eliminates the ability of AI to introduce potentially unneeded code. TDD is an amazing way to write safer, cleaner, robust, and more maintainable code, and practicing it only benefits us. This course is one of the best investments in getting proficient at test-driving your code.

By Mario Cervera on 10/16/2025

A highly valuable and well-structured course! The explanations are clear and practical. I especially enjoyed the module on TDD with AI. It's a cutting-edge topic that’s rarely covered in other courses. A great resource for anyone looking to stay ahead in modern software development practices.

By Vasiliki Makrylaki on 8/9/2025

I really enjoyed this course! The instructor explains TDD concepts clearly and with real-world examples, making it easy to follow and apply. Building a complete application from scratch and integrating AI made the lessons practical, engaging, and fun.

By Elena Mountzia on 8/3/2025

An outstanding course for any engineer wanting to use TDD in the real world. It is straightforward, actionable, and focused on applying TDD in practical software development, not just in theory. The instructor seems to have a deep understanding of the course concepts, converting best practices into code.

By John Tsevdos on 7/25/2025

This course is clear, practical, and immediately useful. The instructor explains concepts in a way that makes them easy to apply to real projects. I loved how it covered not just testing techniques but also the testing theory, why we test applications, and the mindset behind it. If you want to build reliable software with confidence while strengthening your testing skills, this course is a must. Highly recommended.

By vasilis psyllos on 7/18/2025

This course was extremely valuable and easy to follow. The instructor was fantastic, and it’s clear he puts a lot of care and passion into his teaching. The material is hands-on and practical, making it a great reason to start using TDD at work. Highly recommended!

By Vanias on 7/10/2025

Very enjoyable course! The speaker conveys the key concepts of TDD through small, concise lessons. Building a real-life application also helps in applying TDD to day-to-day work. Recommended even for absolute beginners.

By Valentina Kontogianni on 7/6/2025

Great structure! I loved how we built a real application from scratch. It really helped understanding TDD and how it can be applied in a professional context. The AI part was really interesting. The instructor has a solid understanding of TDD and an excellent way for communicating key concepts and ideas.

By George Sachpatzidis on 6/18/2025

I’m really enjoying this course so far! The instructor explains concepts in a clear and engaging way, making it easy to follow along even if you’re new to Test-Driven Development. The examples are practical, and I appreciate how the lessons build on each other in a logical way.

By Marios Papadimitriou on 6/18/2025

Well-structured and practical course that blends Kotlin, Spock, and TDD effectively. The AI extension is a smart, forward-looking addition. Ideal for developers aiming to build clean, scalable software. It’s a solid investment for staying current with modern development practices.

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Overall Score : 98 / 100