I've been a full-stack web developer for 4 years now and a senior back-end developer for 8 years now and can create fully responsive web applications with relatively high levels of complexity. The tech stack that I use are the followings:
- Django as the backend framework
- Vuejs as the frontend framework
- tailwind-css for UI
- Redis, Celery and Postgresql as the task manager and database stack
- Rust language for necessary use-cases (mostly performance)
- pandas and numpy for data analysis