You work at a brokerage. Between guzzing Red Bull and plotting your novel about a sensitive, artistic type who ends up wasting their life guzzling Red Bull at a brokerage, you execute customer orders. The system you use to make these transactions is called an order management system.
The OMS provides an efficient way to fill orders, linking with the electronic systems of the securities exchanges to complete the buying and selling.
The efficient nature of the OMS gives you more time to think about your novel. Do you need a love interest? Hmmm...maybe a little cliche.