AI is great at generating text, but many real-world applications need something much more useful: structured decisions that your software can act on.

In TypeSafe AI: Jev Essentials - Building Decision Systems, you will learn how to use Jev by TypeSafe AI to transform unstructured information into structured judgments that can be used directly inside your applications.

This is a practical, project-based course. Instead of spending hours on theory, you will learn Jev by building real-world applications and solving common AI decision-making problems.

We will start by exploring what Jev is, how it works, and how to obtain and configure your API key. From there, you will quickly move into hands-on projects.

Build a Resume Evaluator

You will build a complete resume evaluation application using the Jev JavaScript SDK.

You will learn how to define questions for evaluating resumes, organize and refactor your evaluation criteria, process Jev responses, map those responses into your application's UI model, and display structured results in a web application.

Classify Customer Support Messages

Next, you will use Jev to classify customer support requests.

Using Python and Google Colab, you will evaluate individual customer messages and then expand the solution to process multiple messages in batches.

This project demonstrates how unstructured customer communication can be converted into structured information that your software can categorize, organize, and act upon.

Route Requests to Specialized AI Assistants

Finally, you will explore AI routing.

Instead of sending every request to the same model or assistant, you will learn how Jev can analyze an incoming request and help determine which specialized profile or assistant should handle it.

You will examine the request and response process using Postman and then walk through the implementation of a routing system.

What You Will Learn

By the end of this course, you will understand how to:

• Understand the role of Jev in AI-powered applications
• Configure and use the Jev API
• Work with the Jev JavaScript SDK
• Define structured questions and evaluation criteria
• Turn unstructured data into structured judgments
• Build an AI-powered resume evaluator
• Classify customer support messages
• Perform batch evaluations using Python and Google Colab
• Use Jev for intelligent request routing
• Route requests to specialized AI profiles or assistants
• Integrate Jev results into real-world applications

Who Is This Course For?

This course is designed for developers who want to move beyond simple AI chat applications and build systems that can evaluate, classify, route, and make structured decisions from unstructured data.

You don't need to be an AI or machine learning expert. If you are comfortable with basic programming concepts and want to learn how AI can become part of your application's decision-making pipeline, this course will give you a practical starting point.