Dropbox Software Engineer interview experience

In the first coding round, I implemented a key-value store, then in the second I moved into concurrency and wrote a token bucket implementation to control throughput. Both coding parts were hands-on and felt like they were checking both correctness and how I manage state.

The design round asked me to design an object store similar to S3. They dug into the shape of the system and what components you’d include, and I remember taking time to think through the storage and API boundaries rather than treating it like a single “data model” exercise.

Behaviorally, the first round was anchored in my