I glanced over your LinkedIn profile, to me it looks like you need to add more 'modern' tech skills to your profile. It sucks, but the industry moves to new tech quickly and unless you are an enterprise Java developer, your skills get pretty much outdated in few years and you need to catch up at a fast pace.
I would learn (or highlight it if you already know) React.js and Node.js immediately, along with Postgres and MongoDB. That should get a good boost to the resume.
If you are going full stack, you would definitely need to put in AWS, especially micro services and serverless experience along with golang if possible. You can also learn Python if you want to try your hands on Machine learning as well, but I would recommend just focussing on React and Node.js as they are low hanging fruits and there are good enough openings for those two alone..
I have been in your shoes before and I know it could be overwhelming but you can do it.