A good option is to search for a short-term contract at a cloud-first start-up. Look for something challenging that requires a scalable solution from the ground-up. Even before that you can consider getting some certifications. Unfortunately, it's difficult to learn, and earn on the same job. So if you need to earn a lot on a short period of time, your best chances are in a mid to large company related to your niche. As you said, due to the job market conditions, this will not be easy.

However, if your SaaS product already provides a developer salary, possibly your best chance is to look for sources of growth. Search how you can reposition it based on market conditions for a larger customer base, get professional advice, and even invest in sales, and marketing. Getting a job today might be the easy solution but a few years down the road you might regret it: getting the first customers is always the most difficult part. Finally, consider that if you've been developing for 10 years independently it could be challenging, or unrewarding to lose that freedom.