Front-end development of a tool for monitoring company-wide security incidents.[Team Size] 4 people[Role] Front-end Engineer[Tasks] Detailed design, implementation, unit testing[Environment] React / Next.js / Mantine / JestResponsible for front-end developmentInterpreted unclear type information from the back-end to implement requirements. Engaged with customers to propose Git operations and establish unit testing environments.Designed directory structures with a focus on co-locationHandled code reviews for team members

Unified Messaging Tool Application DevelopmentMarch 2023 - Present (Part-time)Developed an app that unifies multiple messaging tools (Slack, Gmail, etc.) and automatically converts messages into tasks.[Team Size] 4 people[Role] Project Manager and Front-end Engineer[Tasks] Requirements definition, detailed design, implementation, integration testing, unit testing[Environment] Go / Echo / OpenAPI / React / Next.jsConducted development as a front-end engineer while managing tasks, considering design requirements, and collaborating with other engineers to meet deadlinesManaged progress and developed tasks while discussing core functionalities to prioritizeEngaged in discussions with designers to create user-friendly designsGradually took on back-end tasks while catching up on back-end developmentHandled modifications without changing DB structureEmployed schema-driven development using OpenAPIFront-end development was done with Next.js and ReactUtilized APIs created by the back-end for front-end development

Bag Management Tool Development for E-commerce BusinessesJune 2022 - January 2024 (Part-time)Developed a web management interface and consumer web app for lending reusable bags to e-commerce businesses.[Team Size] 4 people[Role] Front-end Engineer[Tasks] Requirements definition, detailed design, implementation, integration testing[Environment] NestJS / React / TypeScript / Docker / GitHub / AWS / StoryBook / PrismaParticipated in the project from inception, engaging in requirements definition and front-end developmentDiscussed app development and business construction, then solidified requirements and conducted developmentUsed React to create management screens and consumer appsThe service won the Good Design AwardConducted back-end development using Nest.jsManaged order information with the Shopify APIUsed Prisma for ORM

Development of a live streaming service for healthcare professionals.[Team Size] 10 people[Role] Member, responsible for both front-end and back-end development[Tasks] Detailed design, implementation, integration testing, unit testing[Environment] Amazon EC2 / ECS / S3 / Amplify / AppSync / Lambda / Amazon Aurora (MySQL) / Ubuntu Linux / TypeScript / Vue.js / Nuxt.js / PHP / Symfony5 / JavaScript / Knockout.js / Docker / GitHubModified live streaming toolsHandled both front-end and back-end using Symfony and Knockout.jsCreated a My Page function from scratchConsolidated scattered functionalities into a user-centric management pageDeveloped a user management screen for an iOS app from scratchCreated GraphQL APIs using AppSyncImplemented front-end with Vue.js and Nuxt.js using Composition APICoordinated front-end and back-endHandled resource updates and deletions with LambdaManaged transactions to prevent inconsistencies when retrieving data from multiple resources (Cognito and DynamoDB)Established unit and UI testing for the iOS app, which previously had none

Infrastructure Industry - Business Efficiency Application DevelopmentOctober 2019 - February 2020Development of a system for compiling experimental data and generating reports for nuclear risk management.[Project Size] 2 people[Role] Member[Tasks] Detailed design, implementation, integration testing, unit testing[Environment] Windows 10 / Visual Studio 2017 / Access 2016 / C#.NETI have also participated in several other projects.