[turing_complete]

The fastest way to earn more money is probably to get a new job or do consulting on the side. Soccer betting is a terrible idea.

[porcc]

As a SWE, I often hear that the best way to make more money is to get a new job.

If you get an offer, it's almost guaranteed to be higher since you have been grandfathered into an old rate at your current job and have almost certainly increased in value since you started.