At my previous job I was given permission to fully rewrite the call centre script/tooling used by sales agents. I also came from that team, and took a quick detour to the data team before finally landing in a development role. Giving me a full understanding of not only the agents needs and wants, but the limits on data being fed into this system.

The resulting page loaded 10 times faster than what it replaced, which was a 'no code' option that the sales director set up. My solution was built with HTML/CSS/JS/PHP and contained authentication, accessibility, and a toolbox of modules for specific tasks that loaded only when needed (and still lightning fast). Scoring a perfect 100% in every test I threw at it.

The positive result of this change was immediately apparent. Not only to the agents and managers, but to the data team. The speed resulted in a full 130% increase in sales, across all agents.

Why? Well, the old script took time to download Google Fonts and a boatload of other garbage which put the page load at 2+seconds. This was dead air piled on-top of the delay caused by the auto-dialer. Meaning everyone we called had 3+ seconds of nobody saying anything. When this was cut to 1 second, there wasn't a telltale delay to work around in the sales process.

So at least in this case, it took the sales director to care enough, not the dev.

I built the entire thing in 3 days with zero assistance.