Opendoor fullround interview experience
- Location
- Seattle
- Posted
- 8 Apr 2026
Summary
I interviewed for a senior full‑stack engineer role at Opendoor in Seattle, completing recruiter, technical, two React, system design, and behavioral rounds, but ultimately failed due to insufficient CSS knowledge.
How it went
I applied for a senior fullstack position in Seattle
Recruiter Screen:
Literally asked me nothing, just talked about the interview process
Tech screen:
Part 1) Build a key value store that supports operations add, update, delete
Part 2) Support operations isExpired, sleep(time), setTTL(ttl)
Interviewer seemed to hate his life.
React Interview 1:
Build a react app that makes a web request for a list of images and renders rows and columns dynamically as window size changes while keeping images the same size.
Very CSS focused which I wasn't prepared for since I am a mobile dev.
React Interview 2:
Part 1) Debug a rendering issue with the scabble board. It's a css margin issue on the p tag.
Part 2) Make a network request for game data and render the scrabble board. They asked me to implement the first two buttons here https://scrabble-interview.vercel.app/frontend/game
System Design:
Design Job Queue for Opendoor ops tasks (essentially design Jira).
Imagine 100s of people using the same Jira board. If someone marks a task complete, everyone else should see the changes in real time.
Behavioral:
Very conversational, none of that "Tell me about a time you..." STAR bullsh*t. Mainly just talking about a couple projects I worked on.
Result:
FAILED. I don't know css at all, I didn't think the react interviews would be so focused on css. I know react very well, but in a mobile context only, so no css.
Questions asked (5)
- 01
Implement a Key-Value Store with TTL Operations
Data Structures & Algorithms
Build a key‑value store that supports the basic operations
add,update, anddelete. In addition, implement the following TTL‑related operations:isExpired,sleep(time), andsetTTL(ttl). - 02
Responsive Image Grid React App
Data Structures & Algorithms
Build a React application that performs a web request to retrieve a list of images, then renders those images in rows and columns that automatically adjust as the browser window size changes, while keeping each image the same size.
- 03
Debug CSS Margin Issue in Scrabble Board Rendering
Other
Identify and fix a CSS margin problem on a
<p>tag that causes incorrect rendering of a Scrabble board UI. - 04
Implement Scrabble Board Data Fetch and Button Functionality
Data Structures & Algorithms
Open the problemCreate a network request to fetch game data and render a Scrabble board. Additionally, implement the first two buttons as demonstrated in the provided frontend demo.
- 05
Design a Real-Time Job Queue System for Ops Tasks
System Design
Design a job‑queue system (similar to Jira) for Opendoor operations tasks. The system should support hundreds of concurrent users, and when a task is marked complete, the change must be reflected to all users in real time.