Applied online, heard back from a recruiter about a month later. 15 minute phone screen with the HR recruiter, spoke for about 15 mins about the company, my experience etc. She forwarded me on to the hiring manager who setup a one hour phone call about my experience, skills and why I wanted to work for Hyperloop One. He then setup a skype video presentation and interview with the rest of the manufacturing team in Nevada, which I was informed of a day prior to when the interview was scheduled. Presented to the manufacturing team and answered some relatively difficult and insightful questions. HR called 10 mins later and said they wanted to fly me out to Nevada to interview with the team. Hiring manager also wanted to speak to me again, so I took a half day from work for the phone interview with him. Manager calls in 10 mins late and says he wants feedback from the rest of the team before he does another one on one interview. Pretty unprofessional and unorganized. The next week I fly out to Vegas to interview with the team and see the test track. Cool stuff and good questions, excellent team and impressive people. Thought all interviews went well and was told they would be in touch. E-mailed HR twice about a follow up and only got one follow up about a week later where HR manager said she would ask the team about me....radio silence since then. I can understand blowing off candidates who simply apply online, but not after four interviews and asking them to travel. Worst interviewing experience of my professional life and pretty disappointed. I realize they're "changing the world" and are busy, but e-mails are simple and communication is key.