DoorLoop Fullstack Engineer Interview Questions
& Process

The interview process at this company was quite unprofessional. It started with an HR interview on Zoom where I was immediately hit with 10 React questions before I could even introduce myself. The HR person was late because she forgot about the meeting, and I had to call her to remind her. Then there was a one-hour frontend interview on Zoom, which felt like the interviewer didn't want to be there. After that, a three-hour backend interview took place on-site. The team lead gave me a task but hadn't checked if the code worked, and it failed to run due to a MongoDB connection issue, which I had to fix. The code was also old and used weird libraries. Later, a TypeScript error popped up, which the team lead couldn't fix, so I had to resolve that too. Despite solving the exercise, I was rejected, with reasons like my English or another candidate being faster, ignoring the bugs in their system. The HR person was nice, but the rest showed major issues: unprofessional interviewers, outdated practices, and messy offices. It seemed like they were trying to look more advanced than they are.

The interview process was **pretty fast**. First, I had a **Zoom call** with the recruiter. They sent over a **13-question questionnaire** on React and TypeScript, which was kind of odd. We also talked about **expectations** and the company. Then, my **first interview** was a **live frontend coding session**. After that, the **second interview** was **onsite** and involved **two hours of backend coding** and **one hour with the VP of R&D**. The **technical interview** focused on **adding an audit log** to **MongoDB** with **TypeScript**, integrating it with the **user model** for `create/update/delete`. I needed to **define the model structure** first, then code. Since I hadn't used **MongoDB** or **TypeScript** schemas in **years**, I **didn't quite finish** but was **very close**. The chat with the **VP of R&D** was **very general**, covering **my background**, an **architecture I'd built**, **database indexes**, and **personality questions**. The conversation was **great**. I'm **bummed I didn't pass**, but the process was **really well-organized, clear, and efficient**.

First, I had an online chat with HR. She asked me ten questions on JavaScript, TypeScript, and React. Then, in the second interview over Zoom, I was given a task to do in React.