Fiz uma entrevista na empresa xAI (São Paulo, SP).
Entrevista
Technical interview, mid to hard. I faced a problem related to simulate rocket movement, in a game fashion. It was doable, but not in the time I had, at least not for me.
Perguntas de entrevista [1]
Pergunta 1
Write an algorithm that simulates a game of rockets.
The phone screen was surprisingly in-depth, focusing heavily on algorithms and data structures. After that, I faced two technical rounds, which included implementing a trie-based tokenizer and an in-memory key-value database with TTL expiry. The DSA questions were tough, but I felt prepared after working through the PracHub interview experience archive the week before. Even when I struggled, I found the questions familiar, which gave me a little boost. I ultimately received an offer, but I decided to decline after some consideration.
Perguntas de entrevista [2]
Pergunta 1
Implement a trie-based tokenizer that splits raw text into subword tokens
The process is incredibly fast-paced and skip the HR fluff. Expect a heavy focus on raw engineering talent and low-level system understanding. After the initial screen, I had to jump into a deep-dive session involving real-world infrastructure challenges at a massive scale. They want to see if you can actually build things from scratch under pressure without relying on any "Magic" internal tools.