I have applied for software engineer role through company careers. I got a call for onsite interview the next week. 1st round is to write C programs, compile and execute. The questions are easy and I could write them easily, but the problem comes here is " before writing the code I need to explain how I am going to write and what I am going to use, Once they agree with the approach( which they have in their mind) they allowed me to write the code. "
The interviewer already prepared well those 2 questions and asked me again and again to get the approach what they learnt as best ( in fact what she/he gone through earlier).
And one more thing , when he asked me to write program, he given the laptop and continuously starring at screen what I am writing (which I felt very discomfort).
Finally I wrote the programs well and expected a call for the next round. But I got an e-mail that I am not fit for Arista. The way they interviewed me was wrong as I believe. Because an interviewer should never expect a job seeker to give answer in what approach they thought. They should observe the candidate whether he/she could to think in different ways to solve the problem. I guess the interviewer was new . Any ways this is very bad experience, which makes the candidate's confidence low. If someone really trying to get an offer from this, they will not get any offer until we face this kind of interviewers.
Interview questions [2]
Question 1
Q1) write a C program to find the missing number in an array of integers which are consecutive and sorted. array = { 1,2,3,5,6}; missing number is '4'
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!
Arista Networks interviews FAQs
Software Engineer applicants have rated the interview process at Arista Networks with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 56% positive. To compare, the company-average is 60.3% positive. This is according to Glassdoor user ratings.
Candidates applying for Software Engineer roles take an average of 13 days to get hired, when considering 224 user submitted interviews for this role. To compare, the hiring process at Arista Networks overall takes an average of 14 days.
Common stages of the interview process at Arista Networks as a Software Engineer according to 224 Glassdoor interviews include:
One on one interview: 31%
Phone interview: 28%
Skills test: 19%
Presentation: 6%
Group panel interview: 6%
Background check: 3%
IQ intelligence test: 2%
Drug test: 2%
Other: 2%
Personality test: 1%
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