Wallet Hub Software Engineer Interview Questions
& Process

Ho dovuto fare un test tecnico offline di sviluppo in Java focalizzato su algoritmi per la gestione di grandi quantità di dati. C'erano 4 esercizi da completare entro 4 giorni, e poi ho inviato le mie risposte per la revisione.

It started with a Java, MySQL Exercise. This exercise should be easy if you're good at oops and basic understanding. The second round was focused on ADS with two simple questions. Try to solve these questions with O(n) complexity and know the various edges well. The third round was focused on previous experience and more in-depth analysis of the second round questions. The final round was with the CEO. This round was about your previous culture, overall experience (stack, cloud), teamwork, and technologies you've worked on, etc. I've shared my experience, but I wanted to mention something about the company. Some people are rude. I noticed this during the interview itself. They never follow the committed time. I don't know how they handle clients and get projects going. They want you to work 55 hours a week. The issue isn't the hours, it's the salary. Even with 55 hours, they offer low pay. It's crazy. At some point, I was very angry about consulting companies because they take 20% and give you 80%, but this company is the worst. Think before applying to these kinds of companies. Most reviews about this company are fake.

The interview process is like many others described here. It starts with a home assignment where you have to load logs to MySQL. Then there are two questions: one is to remove HTML tags, and the other is about getting the product of numbers in an array. The chief architect focused on the product of numbers question, but wasn't clear about what he wanted to optimize, as I had an O(n) solution. He seemed to want me to use two loops, but I only used one because the BigInteger where I stored the full multiplication was in that loop. So, he wanted to optimize memory by counting zeros first. If there are more than two zeros, return an array of zeros; otherwise, do the multiplication. If the array is huge, as he said, a double loop would likely be worse than keeping the result in memory. Given all the reviews on Glassdoor, it's probably best to stay away from WalletHub.