Implement a Byte Pair Encoding (BPE) Tokenizer

Company: Glean

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Quick Answer: This question evaluates practical understanding of tokenization algorithms and string processing, specifically the iterative merge-based approach used in modern NLP systems. It tests algorithm design, frequency counting, and the ability to implement encode/decode symmetry — skills commonly assessed in coding interviews for roles involving language model infrastructure or search systems.