GeezerVison is showing dometrain.com — Courses crafted for the real world - Dometrain

New · AI Agent on every course

Courses crafted for the real world.

Learn from principal-level engineers, write real code in your browser, and pair with an AI agent when you get stuck. This is training for the job, not another video library.

Browse all courses Meet the AI Agent

★ Rated Excellent on Trustpilot75,000+ engineers

Dometrain’s AI Agent · Hands-On: FizzBuzz kata

██████╗  ██████╗ ███╗   ███╗███████╗████████╗██████╗  █████╗ ██╗███╗   ██╗   █████╗ ██╗
██╔══██╗██╔═══██╗████╗ ████║██╔════╝╚══██╔══╝██╔══██╗██╔══██╗██║████╗  ██║  ██╔══██╗██║
██║  ██║██║   ██║██╔████╔██║█████╗     ██║   ██████╔╝███████║██║██╔██╗ ██║  ███████║██║
██║  ██║██║   ██║██║╚██╔╝██║██╔══╝     ██║   ██╔══██╗██╔══██║██║██║╚██╗██║  ██╔══██║██║
██████╔╝╚██████╔╝██║ ╚═╝ ██║███████╗   ██║   ██║  ██║██║  ██║██║██║ ╚████║  ██║  ██║██║
╚═════╝  ╚═════╝ ╚═╝     ╚═╝╚══════╝   ╚═╝   ╚═╝  ╚═╝╚═╝  ╚═╝╚═╝╚═╝  ╚═══╝  ╚═╝  ╚═╝╚═╝

Dometrain’s AI Agent

An agentic coding assistant inside your exercise workspace. Ask it to write, fix, refactor, or explain. It creates and edits files and runs the exercise tests, and you can watch it work in the editor as it goes.

/clear start over with a fresh session

Type a prompt below to get started. Use @ to reference a file by name.

❯Ask the agent to write, fix, or test your code… (/ commands, @ files)

●Ready✦ explain: offLimits23% used

Learn across

C#ASP.NET CoreSystem DesignKubernetesGoTypeScriptReactMicroservicesDockerSQL & DatabasesREST APIsRustJavaPythonAWSAzureDevOpsApplication SecurityData Structures & AlgorithmsClean ArchitectureC#ASP.NET CoreSystem DesignKubernetesGoTypeScriptReactMicroservicesDockerSQL & DatabasesREST APIsRustJavaPythonAWSAzureDevOpsApplication SecurityData Structures & AlgorithmsClean Architecture

The Dometrain app

Your courses, on your phone

Watch lessons, write and run real code, and keep your daily practice going. On iPhone, iPad and Android.

Hands-on coding lessons
Daily practice
Offline downloads
Progress everywhere

Free to download. Downloads need Lite, Pro or lifetime access.

QR code that opens dometrain.com/app — Scan with your phone

the platform

You don't just watch. You build.

Every part of Dometrain is designed around doing the work: real code, real tests, real design decisions, and honest feedback at every step.

Expert-led courses

Recorded by principal-level engineers who build and run production systems. You get the technique, the trade-offs, and the scars behind it.

Browse the catalog →

Hands-on exercises

Write real code against real test suites, right in your browser. No setup, no repo cloning, instant feedback on every run.

See Hands-On courses →

AI Agent on every course

It edits your files and runs your tests on exercises, builds System Design diagrams, and on video lessons it searches the lecture, drives the player, and explains what’s on screen.

Meet the agent →

System design canvas

Design architectures block by block on an interactive canvas, with checks that know the lesson. The agent builds and reviews diagrams with you.

Explore System Design →

AI mock interviews

A voice-based interviewer that adapts to your answers and scores you honestly when you hang up. Find the gaps here, not in the room that matters.

Try an interview →

Progress you can prove

Certificates, streaks and progression stats, and learning paths that end with a certificate when you finish them.

Browse learning paths →

learning paths

Know exactly what to learn next.

Follow a Dometrain path, pick one from the community or build your own from any course. Paths with 5 or more courses give you a certificate when you finish them.

Browse paths Build your own

start here

Featured courses

Hand-picked from the catalog, taken by thousands of engineers right now.

Browse all courses

who trains here

You're in good company.

Software engineers at the biggest companies in the world use Dometrain to level up themselves and their teams.

75K+

engineers train on Dometrain

1,000+

companies upskill their teams here

99%+

of students are satisfied with their course

pricing

Start for free. Upgrade when you're ready.

Watch full free courses without paying a cent, then pick the plan that matches how far you want to go.

from the blog

Featured blogs

Deep dives and practical write-ups from the engineers behind the courses.

Browse all blogs

reviews

What engineers say about us

I really like the way Nick covers programming topics on YouTube, so when I saw he had courses available, I went for them (Zero to hero API and DI courses). Not going to lie, initially, I thought the price was a little expensive, but I still went for it. After going through them, I now believe they are SO CHEAP FOR THE VALUE. There is so much content packed into them, but the real gem is the insider professional knowledge and tips he shares. Overall, 100% recommend.

Gwyneth Peña-Siguenza

Cloud Advocate @ Microsoft

As always Nick makes the concepts so simple for anyone to grasp. The way he showcases the unit testing techniques, by following practical examples of day to day problems that engineers are facing, is truly remarkable. Thanks Nick. Keep rocking and keep coding!

Orestis Meikopoulos

Azure Service Engineer @ Microsoft

Nick's course are very easy to understand, they cover things in a very efficient manner, and the content is easy to find if I ever need to review something. Nick includes the sample code from the lessons broken up based off of how far you are into the courses as well, this make it easy to quickly set up and follow along from any part of the course. Overall I have to say Nick is the best teacher I have ever relied on to learn from beginner to expert.