→ /devjourney/v1

A bootcamp's tooling. For the price of a Udemy course.

Desktop app for learning C# and .NET 10. Real IntelliSense, a real debugger, and an AI tutor that actually reads your code.

▸ Coming soon

◆Lifetime license ◆Windows 10/11 ◆14-day refund

DevJourney — Program.cs
1 using System; 2 3 public class Program { 4 public static void Main() { 5 var x = "hello" + 1; 6 Console.WriteLine(x); 7 } 8 }
.NET 10.0 C# UTF-8
Ln 6, Col 32 ● ready
DevJourney screenshot — the app window with a lesson on the left, the C# code editor on the right, and the AI helper nearby.

Pay once. It's yours forever.

— No subscription. No cloud. No compromises. —

01 · The real environment

Editor, debugger, and compiler — like at work.

Microsoft's Roslyn — the same C# engine behind VS Code — plus your local .NET SDK. Errors appear as you type, and Run compiles real code on your machine. Like at work.

Pick a feature ↓

Calculator.cs — IntelliSense─ □ ✕
3public class Calculator {4 public static void Main() {5 Console.Wr6 }7}
  • MWriteLine(string value)
  • MWriteLine(int value)
  • MWriteLine(object value)
  • MWrite(string value)
  • PWindowWidth{ get; set; }
WriteLine(string value)
Writes the specified string, followed by the current line terminator.
● RoslynLn 5, Col 14

02 · AI tutor

Your AI. Your subscription. No bill from us.

DevJourney drives OpenAI's Codex CLI and Anthropic's Claude Code CLI — the same tools professionals use — locally, as a subprocess that sees your code and your lesson. You pay with the subscription you already have.

Pick an integration ↓

DevJourney — Tutor─ □ ✕
codex · gpt-5 · plus
subprocess
$ codex --file Calculator.cs --ask "why CS0029?"
gpt-5 ›Linia 6 przypisuje wynik konkatenacji stringa do int. Operator + przy stringu robi concat, nie sumę.
›Zamień "" + 1 na 1 żeby zachować typ numeryczny.
$
›Subprocess call with project files in context
›Interactive mode or one-shot prompt
›Only the cost of your ChatGPT plan

03 · A curriculum with substance

550+ lessons. 42 chapters. Ends with a real ASP.NET Core app.

Nine parts walk you from `Console.WriteLine` through OOP, LINQ, async, testing, and EF Core to Web APIs — with mini-capstone projects along the way — and end on TaskTracker, a real app you run locally.

9 parts · 42 chapters · 550+ lessons
  • 01What Is Programming?
  • 02Meet C# and .NET
  • 03Your First Program
  • 04Values, types, and variables
  • 05Operators, strings, and expressions
  • 06Control flow
  • 07Methods
  • 08Collections basics and error handling
  • 09Classes and objects
  • 10Inheritance and polymorphism
  • 11Interfaces and abstract types
  • 12Structs, records, and enums
  • 13Generics
  • 14Collections deep dive
  • 15Delegates, lambdas, and events
  • 16LINQ
  • 17Asynchronous programming
  • 18Modern C# Features and Patterns
  • 19Projects, Packages, and Tooling
  • 20Files, Streams, and Serialization
  • 21Application Building Blocks
  • 22Unit Testing with xUnit
  • 23Database fundamentals
  • 24EF Core Foundations
  • 25Modeling data and migrations
  • 26Advanced data access
  • 27Saving, transactions, and performance
  • 28Introduction to Web Development
  • 29Your First Web API
  • 30Routing and Middleware
  • 31Minimal APIs and Controllers
  • 32Binding, Validation, and Content
  • 33Authentication
  • 34Authorization
  • 35Cross-Cutting Concerns
  • 36Documentation, Versioning, and Real-Time
  • 37Integration Testing
  • 38Debugging and Performance
  • 39Security Essentials
  • 40Deployment and Operations
  • 41Application Architecture
  • 42Capstone: TaskTracker
✦ capstone

Capstone — TaskTracker

A real web app for task management: ASP.NET Core Razor Pages + EF Core + SQLite, with an xUnit test suite. Multi-file editor, built-in HTTP client to test the endpoints.

Frequently asked questions

Windows 10 and 11 only. Earlier versions had a cross-platform build — the current release targets Windows because that's where the .NET SDK and debugger integration shine.
Yes — DevJourney uses your local .NET SDK to compile. The app detects it automatically. If you don't have it yet, a link to Microsoft's installer is provided.
One license = activation on 2 machines at once. You can deactivate on the old machine and move to a new one without contacting support.
You pay $39 once. No subscription. You get all future content updates within the 1.x line. A future 2.x might be a separate product — but your 1.x never shuts off.
Not from us. DevJourney integrates with OpenAI Codex CLI and Claude Code CLI — you use the subscription you already have (ChatGPT Plus / Pro or Claude Pro / Max). The call is a local subprocess, so there's no server in the middle.
Yes. "Open in IDE" opens the project in VS Code, Visual Studio, Rider, or Zed in one click. The project is just a normal .NET directory — no weird format.
TaskTracker — a real ASP.NET Core Razor Pages web app with a SQLite database, full CRUD, and an xUnit test suite. Multi-file editor, built-in HTTP client to test endpoints. Not a toy — something you can actually show.
14 days from purchase, no questions. Email contact, full refund.
After completing all 42 chapters you get a PDF certificate with a verification hash — anyone can verify its authenticity on the site.
.NET 10 (open source, great tooling, clear career path) and Microsoft's tooling is just better suited for learning. An earlier DevJourney taught Java — the pivot was deliberate.

READY?

Start today. Finish with a certificate.