I was hired as the first engineer in the new NYC HQ for Vroom (over $1b in revenue) as a Senior Software Engineer and promoted to Engineering Lead after 10 months, managing a team of 5 engineers.
This resulted in page speed improvement of over 10x, reduced server costs, and drastically increased development speed and release cycles. The codebase I wrote was spun off into a boilerplate that was open sourced and used as the starting template for other apps both internal/external within the company (eg. sellusyourcar.com).
Hired and managed/mentored a team of 5 engineers, implemented agile/scrum processes.