The interviewers were friendly. However, the interview process is designed to ask questions which the interviewer seems to deem important. This is highly dependent on the interviewer's skill, which is not suitable for a Full Stack developer.

They want to imitate Bar Raiser like Amazon but fail to ask questions beyond an elementary level which the interviewer is familiar with.

The interview focused only on monolith system design, basic MVC API design, and some elementary-level questions, which was not what I was hoping for.

This is because most of the key areas of full-stack development, like:

• System Design
• CI/CD
• Cloud Technology & Security
• Streaming Analytics
• Microservice Mesh Architecture

etc., were never asked.

As a full stack developer, I attended two rounds of interviews:

First Round:

• Find a duplicate in an array:

  • For unsorted arrays: Explained using a set.
  • For sorted arrays: Explained using the total sum.
  • For O(1) space complexity: Explained using a Bloom Filter.

• How encryption works in HTTPS? The interviewer was not aware of CipherSuite concepts and focused only on the initial asymmetric key sharing phase. As expected from younger interviewers, since CipherSuites were never explained in college, I guess.

• What is ACID?

Second Round:

• API design for displaying user activities:
  • Used Nest.js to design the MVC pattern.
  • Implemented a simple heartbeat solution to update timestamps over WebSockets and to retrieve the latest online users and plot user activity history over an RDB.
  • Suggested using a key-value store like Redis to improve latency.
  • Finally, a single, good question worthy of an interview:
    • Discussed scaling by using consistent hashing over document_id to distribute load across multiple datastores and use a Load Balancer over containers.