It started with a phone call asking simple questions about my experience, then told me about the date of the first interview. The first one was technical questions about problem-solving, databases, and OOP in Java. It was a relatively easy one with a good interviewer. Then, they send me a backend task to simulate APIs for customer shopping carts. It was trivial but took a long time like 3 or 4 days. After I sent the task, they never replied even though I followed up with them by email but got no answer.