Submitted resume & cover letter then had a roughly 1 hour phone interview which was a mixture of questions regarding algorithms and computer science concepts with one of their software engineers, as well as personal and career questions with some higher level management. Shortly thereafter I was invited to headquarters for a longer, tripartite interview, with more extensive coding questions (on paper), then more general computer science questions, and finally an interview with one of the founders.

Company recruiter contacted me and asked basic questions. Phone interviewed by a senior technical engineer. Went to the company, took a test, and was interviewed by other three engineers and one person from the management team.