I applied online. The process took 4 weeks. I interviewed at Adyen (Chicago, IL) in Apr 2024
Interview
- Submitted application on their LinkedIn job posting
- 30 min phone call with recruiter
- Hacker Rank OA with 2 coding challenges of medium and hard difficulty with 90 minutes time limit. First one is math related and second was a twist on Dijkstra's algorithm. Similar to what you find on Leetcode. The graph problem can be difficult if you haven't seen it before or are rusty with graph algorithms. A couple of days later I get passed by recruiter and scheduled for next interview.
- 1 hour technical Interview with 2 senior engineers going over my resume and talking about past projects concisely. Then went over my Hacker Rank solution where I had to explain my thought process and how to optimize it or clean up the code. A couple of days later I get passed by recruiter and scheduled for next interview.
- 45 minute system design interview with 2 senior engineers using Hacker Rank as whiteboard. Design a payment service provider. I was drilled with various questions on what HTTP APIs I would define, what is the request content, and authentication. I drew an architecture diagram showing integration with databases, queues, load balancers, 3rd party payment networks. The interviewers were not really collaborative. Next day I get rejected with feedback: not clarifying functional + non-functional requirements, gaps in APIs specifically to authorization, and didn't dive deep into load balancers or horizontal scaling,
The recruiter was a great communicator and transparent. All the interviewers were respectful. They actually do give feedback on your interview which is rare.
Interview questions [1]
Question 1
How would you design a payment service provider that merchants can integrate with to accept payments from their customers?
first step is a call with HR to align on experience and expectations, then an online coding assessment on Hackerrank of which I believe you need to answer everything perfectly to go to the next step
Interview questions [1]
Question 1
HackerRank set of exercises split in sql and solve coding problems related to the industry
I applied through other source. I interviewed at Adyen in Feb 2026
Interview
Initial step was a 30 min screening call with someone from HR. They were very friendly. First time I didn't pass a screening call in years, make sure to study the 8 company values on their website beforehand.
I applied through a recruiter. I interviewed at Adyen (Madrid) in Nov 2025
Interview
Madrid: good technical process, but POOR communication and lack of closure after final interview
Pros:
* The recruitment process is technically good and well-structured in its early stages.
* The initial assessment consisted of a HackerRank technical evaluation with a programming exercise focused on performance, object-oriented design, and three SQL questions, which felt relevant and fair.
* This was followed by a technical interview discussing the assessment results and deeper system/design topics.
* I also had a hiring manager interview and a technical leadership interview, both of which were professional and engaging.
* Throughout most of the process, the recruiter was very responsive, usually replying within 48 hours.
Cons:
* After completing the final interview, communication abruptly stopped;
* I attempted multiple follow-ups via email and phone without receiving any response.
* Only after reaching out to one of the technical leaders I had interviewed with did the recruiter reply, stating she would call — but that call never happened, and communication stopped again.
* The lack of closure after reaching the final stage felt unprofessional and inconsistent with Adyen’s publicly stated values around transparency, ownership, and respect.