Justin D
Lead Software Consultant at Winters Technology Consulting
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolJustin D is a lead software consultant and engineering leader with 12 years of experience designing and operating cloud-native, high-throughput systems across logistics, payments, e-commerce, and data platforms. He combines deep JVM expertise—Scala, Kotlin, Java—with event-driven architectures (Akka, Kafka, event sourcing) to deliver mission-critical platforms that process tens of millions of daily shipments and transactions. As founder of a JVM-focused consultancy and current lead at Deloitte, he bridges hands-on delivery with stakeholder-facing responsibilities: roadmap execution, vendor coordination (notably Akka), incident remediation, and mentoring distributed teams. His work at PayPay and contributions to Apache Hudi highlight a strong bent toward large-scale data engineering and datalake technologies. Based in Tokyo with international experience in Canada, Japan, and the U.S., he repeatedly improves observability, cost controls, and resilience during peak loads. Colleagues rely on him to turn complex distributed-system challenges into pragmatic, production-ready solutions.
11 years of coding experience
6 years of employment as a software developer
Bachelor’s Degree, Computer Science, 3.7 / 4, Bachelor’s Degree, Computer Science, 3.7 / 4 at University of Waterloo
English, Japanese
Github Skills (73)
stream-processing10
javascript10
nodejs10
css10
chrome10
incremental-processing9
ionic9
big-data9
data-integration9
angular9
js9
html9
hadoop9
windows9
apache-flink9
Programming languages (6)
Github contributions (5)
ssdong/git-command-visualizer
Mar 2021 - Apr 2021
Contributions:26 commits, 31 pushes, 1 branch in 26 days
ssdong/Magic-Tower
Jul 2014 - Feb 2019
Contributions:49 commits, 12 pushes in 4 years 7 months
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