# Hyun Sik Kang

> Senior Software Engineer

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/hyun

Software Engineer with proficiency in Ruby on Rails design, development, maintenance, and testing on software applications related to e-commerce and education.

## Work Experience
### Senior Software Engineer @ thredUP
Jan 2018 – Jan 2025 | San Francisco Bay Area

### Software Engineer @ thredUP
Jan 2016 – Jan 2018

### Associate Full Stack Software Engineer @ Dot & Bo
Jan 2016 – Jan 2016
Application Environment: Ruby on Rails, Capybara, RSpec, PostgreSQL, jQuery, Reactjs, Flux
- Collaborated with engineering team to design, architect and build a service oriented and seamlessly integrated e-commerce platform from the ground up. Platform consisted of a single API and two separate React applications: the CMS and Storefront

- Designed and improved a number of data models, including a single extensible and encapsulated content object which represented all forms of content that was used on both the CMS and Storefront

- Built automatic JSON serialization and normalization across all API response objects
Integrated token based authentication system with several authentication mechanisms including Google OAuth

- Built highly interactive features within the CMS to improve employee workflows, such as a drag-and-drop framework to support several types of content, real-time search functionality, and WYSIWYG editor integration

- Built an entirely new integration with Braintree for ecommerce website payment processing 

- Responsible for significant performance optimizations within the new platforms such as reducing the response time of updating a content zone by a factor of 60

- Introduced integration testing processes and led the integration of testing tools across all applications

- Wrote multiple internal tools for streamlining and optimizing application development including tools that facilitated the creation of testing data

- Architected new method for the identification and classification of color attributes in product photos by leveraging Google vision API and building a custom RGB to CIELAB mapping system

- Provided key insights into React and Rails best practices, design patterns, and coding styles in weekly engineering meetings 

- Collaborated with leadership to develop a code review process to optimize internal engineering practices

- Managed many application environments and their resources in Heroku for both staging and production

### Software Engineer Intern @ Mentive
Jan 2015 – Jan 2015 | Berkeley Skydeck
Application Environment: Ruby on Rails, Capybara, RSpec, PostgreSQL, and jQuery 

- Contributed to the development of an educational platform which facilitated access between   mentors and students by emulating a small study group 

- Integrated multiple-identity authentication systems with several authentication mechanisms including Facebook, edX, and LinkedIn 

- Fully integrated Stripe and Paypal payment processors 

- Integrated GoToMeeting video conference application 

- Architected an automated scheduling system that determined if provided time was available for scheduling meetings while accommodating a limited amount of GoToMeeting licenses 

- Integrated and customized a forum solution within the application


## Education
### Bachelor of Science (BS) in Electrical engineering and Computer Science
University of California, Berkeley
Jan 2013 – Jan 2015

### Computer Science in Computer Science
Diablo Valley College
Jan 2010 – Jan 2013


## Contact & Social
- LinkedIn: https://linkedin.com/in/hyun-sik-kang-29bb1392

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Source: https://flows.cv/hyun
JSON Resume: https://flows.cv/hyun/resume.json
Last updated: 2026-03-23