Revolutionize Your Golang Development with Juni AI: Build Full E-commerce Applications in Minutes

The landscape of software development is undergoing a significant transformation with the introduction of AI coding assistants. JetBrains' Juni represents a paradigm shift in how developers interact with AI to write code, particularly for Golang projects. This powerful coding agent goes beyond simple code completion and actually builds entire applications from natural language prompts, making it a game-changer for Golang developers.

Getting Started with Juni in GoLand

Before diving into what Juni can do, let's quickly cover how to install it in your GoLand IDE:

1. Open GoLand and navigate to Settings
2. Go to the Plugins section
3. Search for "Juni" in the marketplace
4. Click Install and restart the IDE when prompted

Once installed, Juni integrates seamlessly within your development environment, ready to assist with coding tasks of varying complexity.

Building a Complete E-commerce Application with Juni

To demonstrate Juni's capabilities, let's walk through building an e-commerce application using Go and SQLite. We'll start with a fresh Go project containing only default settings.

Creating the Initial Application

With a simple prompt, we can ask Juni to build a complete e-commerce application:

After submitting this prompt, Juni gets to work. Without any manual intervention, it creates a fully functional e-commerce application with CRUD operations, database integration, API endpoints, and comprehensive tests. What's remarkable is that Juni doesn't just generate code snippets - it builds a complete, working application structure.

Enhancing the Application with gRPC

The initial implementation uses REST APIs, but what if we want to add gRPC support? With Juni, modifying the existing application is straightforward:

Juni then extends the application to support both REST and gRPC interfaces, generating the necessary protocol buffer definitions and server implementations. This demonstrates how Juni can adapt and enhance existing codebases based on new requirements.

Juni's Operational Modes

Juni offers different modes of operation to suit your workflow preferences:

• Brave Mode: Juni works autonomously without interruptions, making decisions independently
• Standard Mode: Juni asks for permission before performing operations like deleting files or running terminal commands

The Standard Mode provides more control, allowing you to review changes through GoLand's diff viewer before they're applied. This is particularly useful when working with existing codebases where you want to carefully manage modifications.

Working with Existing Projects

Juni isn't limited to creating new projects - it can also help maintain and update existing codebases. For example, you can ask Juni to update all dependencies in your go.mod file:

Juni will analyze your dependencies, determine compatible version upgrades, and update the go.mod file accordingly. It can even run tests afterward to ensure everything still works as expected.

Customizing Juni with Project Guidelines

One of Juni's most powerful features is its ability to follow project-specific guidelines. By creating a special file named `juni/guidelines.mmd` in your project, you can provide instructions that Juni will follow when generating or modifying code.

For example, you might specify:

These guidelines ensure that Juni's output aligns with your project's architectural decisions and coding standards. This is particularly valuable for maintaining consistency across larger projects or teams.

Practical Applications of Juni in Golang Development

Juni excels in several scenarios that Golang developers frequently encounter:

• Rapid prototyping of new applications or features
• Implementing boilerplate code for common patterns like CRUD operations
• Adding new API endpoints to existing services
• Generating test suites for existing code
• Updating dependencies and refactoring code to accommodate changes
• Implementing cross-cutting concerns like logging, metrics, or authentication

The key advantage is that Juni handles the repetitive aspects of development, allowing you to focus on the more creative and complex parts of your project.

Code Quality and Best Practices

Juni doesn't just generate functional code - it adheres to Golang best practices and produces clean, maintainable implementations. The generated code typically includes:

• Proper error handling with meaningful error messages
• Comprehensive documentation and comments
• Well-structured packages following Go conventions
• Efficient database queries and connection management
• Thorough test coverage with both unit and integration tests
• Proper separation of concerns (e.g., handlers, services, repositories)

Beyond Code Generation: Juni as a Problem-Solving Assistant

Juni can also help diagnose and fix issues in your codebase. When encountering errors or bugs, you can ask Juni for assistance, and it will analyze the problem and suggest solutions. This capability makes Juni not just a code generator but a comprehensive development assistant.

Conclusion: A New Paradigm for Golang Development

Juni represents a significant evolution in how AI can assist with software development. By automating routine aspects of coding while maintaining high quality standards, it allows Golang developers to focus on solving business problems rather than implementing boilerplate code.

The ability to create entire applications from simple prompts, enhance existing codebases, and follow project-specific guidelines makes Juni a versatile tool for both beginners and experienced Go developers. As AI coding assistants continue to evolve, tools like Juni are likely to become an integral part of the modern development workflow.

To experience the benefits firsthand, install the Juni plugin in GoLand and start with simple prompts before gradually exploring its more advanced capabilities. You'll likely find that it transforms your development process by handling the tedious parts of coding, allowing you to focus on the aspects of programming that you truly enjoy.