Decagon Software Engineer Interview Experience — Rejected After the Onsite Culture Screen

Decagon·Software Engineer·Sep 2026
OnsiteHR ScreenTechnical ScreenRejectedmedium
  1. First was a hiring call with Decagon.
  2. Then a technical phone screen, which was a shopping cart problem with redo and undo.
  3. Next was a system design phone screen, where I had to design security for the Decagon chatbot.
  4. The onsite was a culture screen. They asked pretty generic questions like tell me about a project, tell me about a project that went wrong, and how do you use AI. I was rejected immediately after this round.

Published

Curated and edited by PracHub

Practice the questions from this interview

Shopping Cart with Undo and Redo for Add and Remove Operations
Design the Security Architecture for an LLM Chatbot Product
Walk Through a Project, a Project That Went Wrong, and How You Use AI

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Interview at a glance

Company
Decagon
Role
Software Engineer
Rounds
HR Screen → Technical Screen → Onsite
Outcome
Rejected
Difficulty
medium
Interview date
Sep 2026
Questions from this interview
3 questions

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