Ella Choi
Frontend Engineer @Vience Inc
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WORK HISTORY
Frontend Engineer @Vience Inc
University lab-based medical AI visual analysis startup (Seed,~10 people) • Built a cloud-based pathology platform using React and TypeScript, supporting over SVS files with smooth navigation and high performance.• Implemented list and grid UI that required no training for medical staff by reusing core logic across three major features.• Migrated four projects from CRA(Create React App) to Vite in two days, cutting build time from 110 seconds to 20 seconds and enabling stable weekly releases.• Developed a patch-based SVS image viewer and tile generator to support high-resolution medical image analysis. • Automated CI/CD using GitHub Actions, reducing deployment steps from over 10 to 1 and CI time from 3 minutes to 50 seconds.• Resolved over 2,200 issues across build, test, and lint stages and fixed more than 110 security vulnerabilities to stabilize pipelines.• Replaced manual QA with Vitest-based unit testing, improving reliability and enabling automated CI verification.• Set up Husky and lint-staged for pre-commit checks, reducing style-related PR comments by 60% and keeping code consistent. • Reduced pathology data prep time from 6 hours to 30 minutes, helping retain users and enabling demo meetings with two hospitals.• Supported enterprise sales by contributing to over $1 million in qualified leads through platform performance and usability improvements.• Designed a no-training UI that reduced field training costs for the sales team and enabled faster product validation through rapid release and feedback cycles. • Worked closely with the CTO to prioritize and organize over 150 issues, leading to a successful beta launch in 4 weeks.• Led 3 internal tech sessions and created a dev wiki to document recurring issues and shared solutions.
EDUCATION
Code States
Bootcamp
순천향대학교
Bachelor's degree
Algoma University
Foreign Exchange Program
ABOUT ELLA CHOI
As a frontend engineer, I aim to build products that balance great user experience with real business impact- I implemented an intuitive UI for a cloud platform used by medical professionals, requiring no additional training. I also developed a personal portfolio site that meets WCAG standards. In an open source DatePicker library, I implemented screen reader support and keyboard navigation to ensure usability across different user environments. → I have a strong sense for building user-friendly interfaces at the code level and can design with real user context in mind- At a medical AI startup, I took the lead in improving the development environment by automating builds, deployments, and testing. I resolved over 2,200 issues and fixed more than 110 security vulnerabilities. Beyond assigned tasks, I actively addressed technical debt to help stabilize release cycles and improve code quality. → I take initiative to solve long-standing problems and can improve both development speed and code reliability, earning trust within the team. I completed a migration from CRA to Vite across four projects in just two days and shipped a full-featured portfolio website within three. I also built and released an open source calendar library in two weeks, then shipped regular updates every three days based on feedback from over 20 developers. → I’m quick to identify problems, experiment, and deliver results. I also adapt to new tools and AI technologies quickly and apply them effectively in real projects- I reduced data processing time in a cloud platform from six hours to 30 minutes, which helped retain users and enabled demo meetings with two hospitals that led to over $1 million in enterprise leads. I designed a no-training UI that lowered sales team overhead and established fast release and feedback cycles that accelerated product validation. → I believe technical improvements should drive business outcomes, and I approach development with an understanding of product value, user needs, and market fit.
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