What topics does Duffel test in interviews?

Commonly reported topics include Elixir.

Duffel interview questions

From 1 candidate account, updated Oct 12, 2026

Candidate accounts: 1
Rounds on average: 2
Rounds in every loop: 2
Open roles at Duffel: 10

How the loop works

This guide draws on 1 first-hand interview account from Hacker News. Candidates describe about 2 rounds on average, most often a phone screen and technical interviews.

All of them were posted under a forum handle, so we could not verify the authors’ identities.

See open roles at Duffel

Interview experiences at Duffel

Role not stated

Outcome not shared

unknown, London, UK. 2 rounds. Shared by i_am_programmer on hn, 2023-02-16

1Intro callPhone screenA friendly first call that emphasized the functional Elixir stack.Covered: Elixir
2Technical sessionTechnicalAfter a reschedule request the company went silent, then re-engaged months later.

What Duffel is hiring for now

10 open roles in our index.

Most-posted roles

Travel Support Consultant, US1
Head of Technical Support1
Legal Counsel (Commercial)1
Product Manager - Payments1
Product Manager - Flights1
Software Engineer (Backend)1

Top locations

London8
New York City1

Open roles at Duffel

See all 10 roles

Duffel interviews: FAQ

What is the interview process like at Duffel?: This guide draws on 1 first-hand interview account from Hacker News. Candidates describe about 2 rounds on average, most often a phone screen and technical interviews.
What topics does Duffel test in interviews?: Commonly reported topics include Elixir.

These guides summarize public, first-hand interview experiences shared by candidates. They describe the shape of each loop and the topics that came up, not a leaked question bank, and every experience links back to its original source. Processes change often. Treat this as directional prep, not a script.