The Scout team developed a tool based on languages they knew, they proved that there was value and demand in the marketplace, and then they decided to implement

The Scout team developed a tool based on languages they knew, they proved that there was value and demand in the marketplace, and then they decided to implement a performant architecture that can be optimized to handle a larger volume of traffic. Hopefully this post can help some HN startups from making the mistake of pre-optimization. You're not Google until you are Google.