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Arista Networks

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Arista Networks

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Arista Networks is an industry leader in cognitive cloud networking for mission-critical data center and campus environments. Arista’s award-winning platforms deliver availability, agility, automation analytics and security through CloudVision® and Arista EOS®, an advanced ...
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2015 (#30), 2014 (#15)

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Arista Networks Reviews

Arista Networks756
Recommend to a Friend
Approve of CEO
Arista Networks President and CEO Jayshree Ullal
Jayshree Ullal
466 Ratings
    Software Engineer
    Current Employee, less than 1 year
    Nashua, NH
    CEO Approval
    Business Outlook


    Arista has very adaptive culture where most of the employees are flexible with the co-worker's priority and timing. Everyone's focus is on quality work with high coding standard rather than running behind deadlines and deliverables. Plenty of processes in place so that you dont feel left out. Software engineering is very nicely laid out by top management who themselves are great engineers. They relate with day in day out problems of engineering and frequently reivews the processes to improve engineering life.


    none that come to my mind.

    See All 974 Reviews

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    Arista Networks Interviews

    Getting an Interview
    Campus Recruiting43%
    Applied online27%

    1. Software Engineer Interview

      Anonymous Employee in Vancouver, BC
      No Offer
      Negative Experience
      Average Interview

      I applied online. I interviewed at Arista Networks (Vancouver, BC) in Sep 2023


      First call with recruiter 30 mins. Scheduled phone screen with an engineer 1h. Using the Coderpad platform. The first interview was easy and the interviewer was very professional and nice. They cared about the thinking process and pointed you in the correct direction for minor mistakes. Started with short questions from the resume, longer questions about C low-level, printf function expected output, and then leetcode questions about finding missing numbers in sorted arrays and then BST in order successor variations. The final interviews were two 1h sessions scheduled for next week. This was one of the worst interview experiences I've had so far. The interviewer did not set up the environment beforehand and asked questions about my resume to fill in the gap while setting up the coderpad while clearly not listening to my answers. The question was to design Stack API and requirements are not given. I started with exploratory questions about requirements: Homogenous/ Heterogenous Hold data vs. hold only pointers and the caller will handle the actual data allocation discussed tradeoffs. Describe two possible ways of implementation using dynamic arrays vs. linked lists and describe the tradeoff: For the dynamic array, it will have some memory overhead of empty cells which I said we can dynamically reallocate to adjust the size. For the linked list it has to call allocate/deallocate for each push/pop which is time-consuming and has an additional pointer to the next item (memory overhead). The interviewer kept interrupting the thought process by asking too many follow-up questions (for every sentence I told he asked one or two follow-up questions) and he laughed if the answer was wrong in his opinion. Example: What is the time complexity of push with the dynamic array? Answer: O(1) On average if we hit the capacity and need allocation it takes more time. He laughed and said how come reallocation can be O(1). He asked to quantify the time complexity of realloc() function which really depends on the system but I answered it can be constant time if there is a contiguous memory available on the heap or it can find another block and needs to copy which can take O(n). But still average TC of the stack is O(1) because only when we hit capacity we do reallocate (for the nth push) then we can double the capacity and so on. Anyways he said the linked list approach is better (15 mins left) but how can you remove pointer overhead?! I was really confused as a singly linked list without a pointer is not a linked list. Asked about the problem of holding pointers instead of copy of data what can you do to handle (answer using shared ptr). Then he stopped the interview at the 1h mark and asked me to think about the homogenous solution while he talks to the other interviewer. When he came back I answered the question correctly but he said Yeah that's right but the next interview is not gonna happen see you next time bye! Overall if I mentioned something wrong he pushed me in the wrong direction intentionally even when I tried to back up and correct it. It is not clear at all what they are trying to gauge with this interview he seemed to have a specific implementation in mind and just looked for that memorized answer.

      Mentioned above! Design a Stack.

      1 Answers

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    Company updates

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    Arista is Proud of our 1st Billion Dollar Quarter in Sales!
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    Arista Partners With Path Forward on Returnship Program! Our 16-week, paid returnship program is open to professionals with at least five years of experience who are returning to the workforce after a career break for caregiving of two or more years. If you meet these criteria, we welcome you to apply! See currently open positions at the link below
    Your Path Forward at Arista

    Arista Networks Awards & Accolades

    • Best Places to Work in the Bay Area!Silicon Valley Business Journal2022
    • Best Workplaces in the Bay AreaFortune and Great Place to Work2019

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    Arista Networks FAQ

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    What are perks and other benefits like at Arista Networks?

    ...Atmosphere is great, remote policy and benefits awesome...

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    People Also Ask about Arista Networks

    Employees rate Arista Networks 4 out of 5 stars based on 756 anonymous reviews on Glassdoor. In 2014 and 2015, Arista Networks employees have voted their company to be one of Glassdoor’s Best Places to Work.

    To get a job at Arista Networks, browse currently open positions and apply for a job near you. Once you get a positive response, make sure to find out about the interview process at Arista Networks and prepare for tough questions.

    Overall, 75% of employees would recommend working at Arista Networks to a friend. This is based on 756 anonymously submitted reviews on Glassdoor.

    59% of job seekers rate their interview experience at Arista Networks as positive. Candidates give an average difficulty score of 3 out of 5 (where 5 is the highest level of difficulty) for their job interview at Arista Networks.

    85% of employees think that Arista Networks has a positive business outlook. This is based on anonymous employee reviews submitted on Glassdoor.

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    Arista Networks Locations

    • Austin, TX
    • Bayan Lepas (Malaysia)
    • Bengaluru (India)
    • Boulder, CO
    • Burnaby (Canada)
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