Pros: One of the few places where I truly felt comfortable learning and excited to solve challenging infrastructure problems. There is no knowledge hierarchy and it truly feels like you can ask a question to anyone at anytime.

Cons: It is a heavily hybrid company, so it is not always easy to meet your coworkers in person, which would be nice. The company does make it a point to have onsites every now and then, though.

Pros: Great teams and great people

Cons: Low morale from constant changes in priority

Pros: As an engineer, there were plenty of opportunities for boundless experimentation at Klaviyo that provided career growth and product contribution. Everyone has the freedom to spin up servers they need and spend time researching and learning new technologies. The product team was excellent to work with as an engineer, and they allowed engineering to have a lot of input into the roadmap. Come here to learn a lot about distributed systems, all Amazon web services, and the email sending pipeline integrating into ecommerce. You will learn a great, helpful amount to enable you for your next role.

Cons: There needs to be prioritization into the following R&D principles to make the team world class: * Aligned dev environments: right now there are 5 different independently designed systems and bug recreation & new local feature implementation is challenging * Product team leaders need more experience: more experienced leaders could help design better UIs and hold more rigid stances on goals & roadmaps * Chocked-full of 1st-time startup employees: this is dangerous because without careful attention burnout can be produced & inefficient systems of operation * Not an attractive start-up for financial gains: stock prices were always expensive and the plethora of shares handed out to Engs mostly cannot be afforded by them, and hopefully AMT will not bite them later (many of them do not understand AMT so this is scary) * You'll have to work days, sometimes late at nights, and be on call. It's very difficult for the company to understand work-life balance, and that's clear when you hear about the CEO even working during his wedding.