Confluent - Senior Software Engineer Interview Experience | London
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Phone Screen - Modified LRU Cache

  • Implemented a working solution using map + pair data structure.

Coding Round 1 [Hire] - Word Search in a List of Documents

  • Implemented a working solution using an inverted index.

Coding Round 2 [No Hire] - Valid Sudoku

  • Implemented a working solution and clarified how duplicate code could be removed if I had more time. However, the interviewer gave a no-hire recommendation because they felt I shouldn't have written duplicate code in the first place.

Design [Hire] - Movie Ticketing Platform

  • Defined requirements, high-level design (HLD), APIs, database schema, concurrency issues, handling spikes, caching, async processes, and global design.

Values Round [Hire] - Generic Behavioral Questions

  • Questions influenced by Confluent's values and Leadership Principles.

Overall Experience

  • All interviewers were very helpful, except the one in coding round 1. There was very limited communication from the interviewer's end.

Result

  • No offer was extended for the SSE position due to a no-hire decision in coding round 1. They were willing to downlevel, but could not match my current total compensation (TC) for that level.
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