If you’ve ever built a modern web application, you’ve likely encountered the infamous “Access to fetch at ‘https://api.example.com‘ from origin ‘https://myapp.com‘ has been blocked by CORS policy” error. This comprehensive guide explains what cross-origin issues are, why they exist, and how to solve them effectively.

Welcome back to Go! As a backend developer who hasn’t touched Go for years, you’re likely looking to refresh your skills and master the language without wading through beginner tutorials. This guide is designed for someone with prior experience who needs a detailed, concise refresher on Go’s essentials, including recent updates and best practices.

EJS (Embedded JavaScript Templates) is a simple yet powerful templating language that lets you generate HTML markup with plain JavaScript. The “E” can stand for “Embedded,” “Effective,” “Elegant,” or simply “Easy” - all of which describe this lightweight templating engine.

As a backend engineer, venturing into frontend territory with JS and jQuery can feel like learning a new language. This guide covers the essential concepts you need to understand as a backend developer diving into frontend development, updated for 2025.

AWS Transit Gateway provides a centralized, scalable solution for managing multi-VPC networking, overcoming the limitations of VPC peering. This article explores why Transit Gateway is necessary, how it works, and a real-world example of its benefits.