Stash Software Engineer - Front End interview questions

I was contacted by a recruiter via Email then we hopped on a quick call. We scheduled a 30 minute call to talk about the role and basic stuff. After that we scheduled a technical call/screening with their FE Developer. He was an awesome person to talk with and very smart. He asked me a question that was related to closure but I dont remember what the question was. :/ It should be a pretty easy question if you have a understanding of closure and JS in general. I was contacted the same day to schedule an in person interview. The in person interview consisted of 4 interviews Each interview was an hour long but the first 20mins of each interview was them asking behavior question and the last 10 is for questions you might have. 1. FE Portion concentrated in CSS (Build a working traffic light, this was pretty fun) 2. Architecture, I was told that the guy that this question always chooses tetris but he allow me to choose an app to design. I choose the reddit app and he told me to choose a feature that I would like to add and we talked about a scaleable way to add it in. Pretty fun and also this guy is VERY smart and will help you out and give you hints. 3. General algorithm question. He ask me to write a function that takes in an array of int's and a number. This function should output true or false if the number provided can be made using the any two numbers in the array 4. This was a meeting with CTO, now this might seem intimidating but its not. This man is SUPER cool, I get easily nervous but around him I was not nervous. Also he worked for the xbox team! Given a list of numbers, find the longest sum of numbers. So for example given [1, 3, 6, -1, 5, 3, 3, 0, -6] -> The answer is 5 + 3 + 3 = 11. I was contact the next morning with an offer. Ultimately I rejected the offer because I got a better offer. But I do regret not taking their offer because the team was super cool and nice. They seem like bright people that you can learn from. If I didn't have that other offer I would have chosen them.