Having lots of rounds of interviews, as long as each one is effective and focused on a different aspect, in my experience is a green flag because it means they take great care in hiring and you end up working with excellent people. My current job had a talent team screening call, a high level technical best practices discussion, a practical homework assignment with follow-up peer interview and problem solving session, a cross-guild culture interview, and a chat with one of the founders. Apart from the first and last ones they each took more than an hour but they all felt very productive in terms of gathering information in both directions. And it’s by far the best job I’ve ever had

Also the large salary range makes sense if they are hiring e.g. multiple developers and are open to a large range of seniorities/experience levels