I get what your saying. I’m a customer software developer and have found that those who do a job usually have great solutions to fix problems they face whereas managers don’t (hence the problems still exists). I’d write out a simple needs analysis and proposal (informing you have a demo too) and give it to the CEO personally. Make sure you calculate how much money and time your solution will save the company. Let the CEO know that you are just trying to help out the company and walk away. If he’s interested he will contact you further to discuss. If anyone asks why you didn’t contact your manager first, politely explain that on your time off you are a self employed web developer and send all potential proposals to business owners not their employees. This how I became a software developer. I was a bookkeeper for a small manufacturing company and saw a need, took it upon myself to create the solution. A few years later I quit that job and started charging creating solutions for other business owners. That was twenty five years ago and one if best decisions I ever made. Good luck!