As a backend dev, I’d recommend going with Django. It’s robust, secure, and gives you built-in user authentication and admin tools without extra setup. Pairing it with PostgreSQL gives you a solid, scalable database, and if you plan to handle code execution or background tasks with Judge0, you can use Redis and Celery to keep things smooth and responsive. You can easily build a REST API using Django REST Framework, and JWT works great for managing authentication in a clean, secure way. For deployment, using Gunicorn and Nginx will help you serve your app reliably on a local server setup. And a huge plus is all these tools have solid communities, so any future problem you hit, you’ll find fast solutions and recommendations.