I applied through college or university. I interviewed at Arista Networks in Nov 2014
Interview
I have a on campus interview. All the questions are technical, never mentioned about my background or my thought. The coding question is easy. It is about output node's value in a linked list by fibonacci sequence. Then the interviewer asked my to choose one set of questions. There are about 6 sets. I chose OOP first and did very bad in this part. The questions are very basic concept questions that I learnt in undergraduate. Then I chose to answer networking questions. He showed me 10 networking protocols and let me to explain some of them in detail. Such as BGP, OSPF, DHCP, etc. I did good in this part. I think the interview is not too hard, but you really need to be familiar with basic concepts.
Interview questions [1]
Question 1
What's the pure virtue function and how to use it.
I applied through a recruiter. I interviewed at Arista Networks in Jun 2026
Interview
Pros:
Great initial approach – the recruiter thoroughly checked my GitHub profile and projects before the interview, which is very uncommon and shows they do their homework.
Cons:
A major mismatch between the job description ("Software Engineer C++") and the actual interview reality. The technical stage on CoderPad strictly tests bare-metal C98 skills: raw pointers, manual bitwise operations, and packing bytes into 64-bit integers. If you are accustomed to modern C++ (RAII, templates, safe memory management), this will feel like a massive step backward. Additionally, the time expectations for live low-level bit-shifting were unrealistic, to the point where the interviewer started solving the task themselves.
Interview was kind and not stressful, just minor mismatch of naming
I applied through a recruiter. I interviewed at Arista Networks (Łódź, Lódz) in Jun 2026
Interview
Reached round 3 out of 4 planned, one was coding task, two live coding sessions. Linux development background was highly expected. Performance optimized approach was tested, specially oriented for hardware with lots of resources. I had a problem to properly understand reqruiting person during round 3, voice was not clear for me.
Interview questions [1]
Question 1
List implementation, bits counting, tre traversal.
Pretty good, not too complicated, was comfortable. Mostly LC questions, and was easy enough that you should be able to do it after doing NC150. good luck for the interview!