MongoDB Software Engineer interview experience

On the technical side, I was given a lengthy binary parsing style problem where the goal was to parse bytes in a specified format and decode values based on types, including nested structures that needed recursive handling.

The core difficulty didn’t feel like deep algorithms so much as careful, correct implementation. I focused on writing clear code and covering edge cases, but I also remember that I didn’t fully get the bugs fixed quickly enough. By the end, even though I understood what the question was asking, the correctness gaps were what ultimately cost me.

Before that, the HR