Senior Backend Dev (Java/Spring) - Not getting callbacks. Roast my resume.

I have 6 years of experience working with Java, Spring Boot, and Microservices, mostly in FinTech. I thought my experience was solid, but I've applied to over 40 roles in the last month and haven't received a single interview request. I suspect my resume isn't passing the ATS scans. I listed my daily responsibilities (e.g., 'Wrote REST APIs') instead of specific achievements. Is that the issue? Or is the market just that bad right now? Any feedback on how to make my 'Work Experience' section punchier would be appreciated. I feel like I'm invisible.