Han Sim is a Software Engineering Manager based in Toronto with 13 years of diverse experience spanning the U.S. Army, financial analytics in Seoul, and enterprise retail software development. He leads engineering teams at Mi9 Retail, driving full-stack projects built with TypeScript, React/React Native and Node.js while championing design-first practices, mentoring engineers, and improving delivery and code quality. His background in PL/SQL-driven data analysis and process improvements informs a pragmatic approach to data integrity and operational validation in backend systems. Transitioning into tech through Seneca College, he blends disciplined leadership from military service with analytical rigor from insurance analytics to bridge business needs and engineering execution. Notably, he has hands-on experience implementing CI/CD pipelines and automated testing practices that raise team velocity and reliability.
13 years of coding experience
5 years of employment as a software developer
Bachelor's degree, Economics / Spanish Literature, Bachelor's degree, Economics / Spanish Literature at Korea University
Ontario College Diploma, Computer Programmer, Ontario College Diploma, Computer Programmer at Seneca Polytechnic
Chat based SNS implemented using React.js on frontend-side and Node.js on backend-side - https://whotalk.us/
Contributions:12 PRs, 8 pushes in 1 month
reactnode-jschatreact-jsbackend
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Han Sim - Software Engineering Manager at Mi9 Retail