Jun Hanamaki
SDE at Amazon
Luxembourg
Summary
👤
Senior🎓
Top SchoolJun Hanamaki is a seasoned full-stack SDE with 11 years of experience building Ruby on Rails and JavaScript applications, currently delivering scalable services at Amazon from Luxembourg. He has led teams and shipped product-focused systems including survey management platforms, real-time video transcription/tagging tools, and a survey builder while at Streetbees. His background spans healthcare notifications, fantasy gaming, and large-scale fleet and disaster-management systems, reflecting comfort with both startup agility and enterprise-grade engineering. Adept at backend data work with PostgreSQL, Redis and MongoDB as well as rich client experiences, he combines hands-on coding with technical leadership. An unusual throughline in his career is a steady focus on domain-driven apps that turn complex business rules—surveys, medical reminders, leagues—into practical, user-facing workflows.
11 years of coding experience
12 years of employment as a software developer
Bachelor's degree in Information Systems and Computer Engineering, Computer Science, IT, Bachelor's degree in Information Systems and Computer Engineering, Computer Science, IT at Instituto Superior Técnico
Portuguese, English, Japanese
Stackoverflow
55reputation
721reached
0answers
3questions
Github Skills (38)
drag-and-drop9
react8
jquery8
session-cookie8
drag8
react-select8
react-dnd8
javascript7
scrolling7
select27
searching7
jstree7
selector6
trust6
microservices6
Programming languages (5)
Github contributions (5)
junhanamaki/rekiq
Jul 2014 - Mar 2015
Contributions:1 release, 115 commits, 2 PRs in 8 months
workersidekiqrecurringruby
junhanamaki/w_flow
May 2015 - Mar 2016
Contributions:133 commits, 69 pushes, 2 branches in 10 months
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