Focus on how you can contribute to solving business problems, not on your "tech stack." No business has a need for more Java code. What they need are people who can understand business requirements and solve problems. http://typicalprogrammer.com/job-hunting-and-interviewing/
Many, many businesses hire dedicated people for that (Product Owners/BAs etc.) and have a budget to hire programmers to make more Java code.
I think that's confusing business needs with work product.