@x5gtrn
About
Daisuke Masuda (born January 1982), also known as x5gtrn, SAEKIKAZUMI, or DJ Ekusi, is a freelance Japanese software developer who aspires to gain recognition as a DJ. I balance programming and DJing as my lifelong pursuits and am a devoted enthusiast of both music and literature.
I am a passionate admirer of Richie Hawtin, Sven Väth, Ryuichi Sakamoto, Ryu Murakami, Kenji Eno, and THA BLUE HERB. I draw inspiration from their creativity and vision.
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Daisuke Masuda's blogs
Recently published
Python for Java Engineers: Django vs Spring Boot — A Battle-Tested Comparison for Server-Side API Development
Feb 23 · 19 min read · "Engineers with Java design skills become the ultimate full-stack developers when they master Python." As a Java/Spring Boot veteran, you already understand layered architecture, dependency injection
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From Freelance to Full-Time: Navigating the Permanent Hire Journey for Senior Engineers
Feb 3 · 15 min read · The Two-Decade Freelancer’s Dilemma: Why Your Next Interview Isn’t Just Another Gig For twenty years, you’ve been the master of your own destiny. As a full-stack freelance engineer, you’ve parachuted into countless projects, solved complex problems, ...
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The Complete Guide to AWS IaC Tools: CloudFormation, Terraform, and CDK Compared
Jan 19 · 15 min read · Infrastructure as Code (IaC) has become a fundamental pillar of modern cloud operations. For anyone building on AWS at scale, the question isn't whether to use IaC, but rather which tool to choose. Th
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Java vs. Go vs. TypeScript: A Senior Engineer’s Guide to Backend Development in 2026
Jan 15 · 7 min read · As a senior engineer, your technology choices have a lasting impact on your team’s productivity, your application’s performance, and your company’s bottom line. The backend landscape is more diverse than ever, and the debate between established giant...
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