Step 1: Hacker rank test. Step 2: Phone interview Step 3: Onsite interview with other engineers and senior folks. They paid for flight, hotel and transport. After 5 onsite interview they discuss their feedback over the phone and I was unlucky. They also had a lunch interview in between.

1. Chat with hiring manager. 2. Basic coding challenge and discussion with a software engineer. 3. Five hours of more advanced coding questions and discussion with several Helix employees, meeting with each individually.