The home assignment for tech interviews became widespread. Companies like them, as they save interviewer's time and present an objective scale. Interviewees should like them - They work on them when it's convenient, not in the middle of the working day, without standing nervously in front of the whiteboard.
If you're a junior developer, this is your chance to demonstrate how you're better than your years of experience. Prove that you know the best practices and principles of building a small project, instead of just talking about them - Show, don't tell.
Join and learn what the company actually looks for.
Navigating the pitfalls of the home assignment will land you more options, better offers than before, and open doors previously closed. And eventually $$ in your pocket.