I completed four rounds of interviews. After the fourth round they ghosted me despite implying I had the job and my following up. Here is a brief summary of the process: 1) HackerRank Online Assessment (Coding and System Design) 2) Engineering / NLP-focused interview 3) In-person 10 minute presentation of one of their publications (and surprise coding interview!) 4) Interview with Co-Founder A very difficult process for a start-up. They were generally quite disorganised in getting back to me and didn't appear to have a functioning HR department. At every stage I was given an inaccurate description of what the next interview round would consist of. After the third interview they spoke to me as if I had the job. We agreed on salary expectations and they took details of two referees. They said it was just a matter of creating and signing a contract. During the fourth interview the Co-Founder was very positive and said personal objectives and milestones would be drawn up for my role. The process started in November 2023 and never formally ended because they never reverted. An unbelievable waste of time for me considering I spent a whole day preparing a presentation for the third interview, and a total lack of transparency, consistency and courtesy from the company.