Koki Sakai Email & Phone Number

Tokyo, Japan

Ehime, Japan

Japan

Role: Frontend developerDuration: 4 monthsCompany: CodeFox Inc.Description:- Introduced E2E tests using Playwright, including automated email sending, and simultaneously implemented GitHub Actions linked to the above- Proposed and introduced React Hook Form, replacing controlled components with uncontrolled components, improving rendering times by over 300%- Proposed and implemented templates for issues and PRs on GitHub, reducing the time taken per issue or PR creation by approximately 5 minutes per instance- Proposed and introduced Husky to ensure code quality during pre-commit---Role: Frontend developerDuration: 11 monthsCompany: 80&CompanyDescription:- Implemented ISR using Next.js 13, reducing data fetching speed from approximately 3 seconds to 1.2 seconds- Optimized the way to call 5+ APIs for using maximum speed and scalability considering SSR- Created 20+ components coming with 100% reusable code for future use- Implemented user input and error messages before submitting to the back-end using React Hook Form- Collaborated in an Agile work with daily stand-ups, meet design requirements, and QA test application- Developed a total of 10 preview screens for MicroCMS, enabling content changes to be reviewed before updating CMS data- Created 2 APIs with MicroCMS and integrated them for fetching on the frontend- Modified each page to dynamically change the head tag and adjusted to generate a sitemap with SEO considerations- Modified the contact page so that emails sent trigger notifications in a specific Slack channel, including mentions to certain users, for immediate updates---Role: Frontend developerDuration: 4 monthsCompany: Future Standard Co., Ltd.Description:- Optimized the rendering of camera streaming through React, reducing the data rendering number of time s by 50%- Developed and implemented atomic React components using useRef to enhance input videos UX

Vancouver, British Columbia, Canada

- Achieved a 60% reduction in latency for each of the 9 streaming videos, improving their loading times by implementing a caching function using React Query- Reduced extra calling APIs by 30% by developing combined functions using AWS Lambda and Amazon S3- Led the migration from Amazon RDS to Amazon DynamoDB for the team to reduce cloud costs by $400 per year- Redesigned the rendering user information engine from scratch through Next.js and Auth0, reducing the information’s rendering time by 50% - Implemented Amazon SES to send emails by user groups, reducing extra number of the times to call the API by 60%- Updated the saving web socket data function through Next.js and Amazon DynamoDB, reducing the database usage by 50%- Developed Multi-Factor Authentication (MFA) by Auth0 to enhance user login security- Documented designs and specifications by using swagger UI for existing 30+ REST APIs- Within 1 month created 11 pages and each functions to ensure the main service passes all the MVP benchmarks- Mentored 3 volunteers front-end and back-end developers on the team on React, Typescript and documented the rules within the organization

Vancouver, British Columbia, Canada

- Tested software for bugs and operating speed with a team of software engineers to refactor the code and reduce the amount of codes by 20%- Added features to the main application, enabling controlling robots by remote-controllers and clicking icons on the application- Built code management practices by incorporating essential tools such as Husky, ESLint, and Prettier into the project workflow- Refurbished the entire main application using Figma to enhance the UI/UX fro improved usability- Designed whole folder structures of the main app to MVC oriented, speeding up the team members understanding

Vancouver, British Columbia, Canada

- Creating high quality logo designs from abstraction concepts to concrete designs using Photoshop and Procreate. - Collaborating with project managers, e-commerce team and account team to collect their opinions with what our clients want

Tokyo, Japan

- Within 3 weeks created 15+ mockup pages and minimum functions using HTML, Foundation CSS, and Javascript to ensure seeing how the new product works- Designed and developed 20+ web pages of the application based on user stories, requirements, and design specifications- Implemented Amazon Connect, reducing call times by 25% and improving overall efficiencyAssisted to define data structures for seamless data management and full CRUD functionality in MySQL

Tokyo, Japan

〒102-8460 Tokyo, Chiyoda City, Iidabashi, 3 Chome−10−10 Garden Air Tower

- Managing over 10 big and medium-sized teams selling phone and communications at leading electronic and home appliances stores. Proposing strategic and beneficial solutions to the stores and firms having subcontractors and temporary staff.

Diploma, Web And Mobile App Development

HTML, CSS, Sass, Javascript, Typescript, React, Redux, Node.js, Express, MongoDB, PostgreSQL

English Language And Literature, General, 11 (Maximum 17)

Bachelor'S Degree, International Law, 3.2 (Maximum 4)

Activities and Societies: Society group : Football, PhotoShootingSeminar : International Law