Hebbia onsite build day interview

Round 4 of 5 · 2 questions reported

See the whole loop
Length
480 min
Format
About eight hours in the New York office building and deploying an app from scratch from a set of requirements, then a demo to the team
They grade
Shipping a working product in a day and presenting it
Heads-up
A short recruiter prep call comes first. You meet your future teammates, engineering leads and much of the company during the day. A sample brief: a React component that shows data and lets users edit it. One guide says some sessions run late into the evening.

Questions Hebbia asks in this round 2

  • Generalized tic-tac-toe with k in a rowCodingDesign a two-player Tic-Tac-Toe game on a board with n rows and m columns. A player wins by placing k of their own marks consecutively in one line: horizontal, vertical, diagonal…
    Last asked Jun 2026
  • Cache with a snapshot printerCodingBuild a cache much like an LRU cache, with one extra function, snapshot(cache), that prints the cache's current contents in order. A second part builds on it with a compressed…
    Last asked Feb 2026