My responsibilities as a Software Engineer in the Components team include but are not limited to…• Create a central, pixel-perfect design system for an MMS webshop monorepo, using React, TypeScript, Styled Components, and Storybook as core tech stack.• Conduct a thorough accessibility component audit based on WCAG2 and integrate correct patterns into the application.• Increase the adoption rate of the design system by continuously refactoring component interface focused on reusability, maintainability, and code readability.• Collaborate closely with product owner, UX- and frontend engineers on scalable frontend solutions and abstract new components for the design system.• Create and maintain technical documentation about the design system and hands-on code implementation for the internal team and external stakeholders.• Be an ambassador for consistency, usability, and accessibility of our product interfaces, providing code reviews for external teams as a Code Owner of the components library.

• Integrated new frameworks & technologies into the codebase, such as Vue3, TypeScript, Pinia.• Implemented a new design system and create a component library using Storybook.• Investigated feature requirements, research feasible solutions, and review design in Discovery phase.• Wrote JIRA tickets with detailed context & technical description.• Built new product features following BDD scenarios, closely work together with Product and QA team.• Created detailed technical & workflow documents proactively and share knowledge.• Monitored errors with Sentry and respond bugs in a timely manner.

• Migrated the FE part of the product to the Vue.js framework & SASS, implementing pixel-perfect interactive UI.• Reviewed the FE part of the codebase, focusing on maintainability, reusability, and design consistency.• Wrote unit tests with Jest and Vue Test Utils.• Supported engineer onboarding with unit test, Git, and workflow topics.

• Maintained the parallel versions of texts iteratively at each round of release.• Created the product's tone and voice in Korean to express the character of EF Hello with a deep understanding of the Korean language and culture. • Translated learning materials and localized conversational courseware, focusing on contextual consistency, cultural sensitivity, and inclusivity.• Planned ASO (App Store Optimization) and performance marketing, assisting the Growth team.

• Manually tested the EF Hello mobile app, troubleshooting bugs with detailed description.• Defined usability issues and reviewed interface glitches with close attention to design details and functionalities.• Supported the team by being responsible for all QA aspects, providing clear written documents in English.• Conducted post-release product testing and traced old logs to assist the team in achieving product goals.

• Fully responsible for updating the entire group and individual curriculums, which led to a 170% increase in the number of students in 3 months.• Planned and operated seasonal grammar-focused Bootcamp for a group of selected students.• Implemented different teaching methods based on individual students' capacity, personality, and preferred learning material.• In charge of the visual branding for the company, such as logo design, business cards, etc.

• Taught 13-19 years old students with personalized curriculums and teaching methods.• Focused on the significance of language as a tool of communication.