I applied online. The process took 3 weeks. I interviewed at Arista Networks (Dublin, Dublin) in Jun 2016
Interview
Applied online - short phone call regarding the company and team. The first stage was a coding challenge (Codility) followed by a first onsite coding challenge and a second onsite technical interview.
HR is very responsive throughout the whole process. Overall things can move rather fast given interviewers are available.
They need to check reference prior to making an offer - which was no problem on my side but is though different.
Interview questions [1]
Question 1
The Codility challenge was related to strings. The interview questions focused on C/C++ coding. Though the tests are for C, I could use C++ with a change in build system. The problems featured use of different data structures (stack, tree) and algorithms on them.
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
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!
Starts with online test, then three rounds of technical interviews follow.
Not a lot of discussion, just go straight to the technical challenges which have to be solved in time