I Reviewed 30+ MERN Stack Fresher Portfolios — Here Are the 7 Mistakes That Keep Appearing

I recently went through dozens of GitHub repositories and portfolios of MERN Stack developers. It became apparent that while these students have a basic understanding of MongoDB, Express, React, and Node, they have little practical experience building applications that solve real-world problems. Here are the most common mistakes I noticed in these portfolios, along with suggestions for improvement. 1. Every project is the same I see the same exact projects in dozens of portfolios: Todo App Weather App Calculator Notes App While these are great projects to learn from, they do little to demonstrate your ability to build real-world applications. Focus on building applications that solve a business need, such as: Inventory Management System Hospital Appointment Portal Learning Management System Restaurant Ordering Platform Employee Leave Management System These types of applications will demonstrate to recruiters that you have an understanding of how to build applications that solve real-world problems. 2. No authentication The majority of projects I saw had no authentication of any kind. You should spend some time learning about authentication and authorization in your applications, including: JWT Hashing Role-based access Protected routes Session management Authentication is a common interview topic for MERN Stack developers. 3. Bad GitHub habits Many recruiters will review your GitHub profile before looking at your resume. Make sure your repositories are clean, include a README, screenshots, installation instructions, and helpful commit messages. 4. No optimization Many React applications I reviewed had poor optimization, resulting in applications that were slow and unresponsive. You should spend some time learning about optimization in React applications, including: React.memo useMemo useCallback Lazy loading Code splitting Optimization is a key skill for any React developer. 5. No error handling The applications I reviewed mostly worked when everything went smoothly. However, few of them properly handled errors such as: Invalid input Missing data Network errors Authentication errors Database errors It’s important to write applications that can handle errors gracefully. ## 6. No deployment If recruiters can’t see your application, they won’t be able to evaluate it. Deploy your applications to a service such as Vercel, Netlify, or Render, and include the link in your GitHub repository. 7. Too reliant on AI While AI can be a helpful tool, it’s important to understand how your code works. During interviews, recruiters will often ask you to explain the code you’ve written. If you rely too heavily on AI to generate code for you, it won’t be easy to explain what you’ve done. Finally Learning the MERN Stack is more than just watching videos or attending classes. It’s about practicing, learning from your mistakes, and constantly improving your skills. Building applications that solve real-world problems, writing clean code, and maintaining an up-to-date GitHub profile are all important aspects of being a successful MERN Stack developer. If you’re looking for a structured way to learn the MERN Stack, including hands-on practice and interview prep, I highly recommend this institute: Edure Learning Discussion For experienced developers: What is the worst MERN Stack mistake you see in portfolios? What project helped you get your first software development job? What project would you have developers build first if they were just starting out?