Hi, I’m Kotomi Watanabe, a full-stack web developer with a focus on React and NestJS. Over the past two years in the Japanese IT industry, I’ve built robust frontend and backend solutions, implemented UI/UX touches, and contributed to API development and testing to deliver reliable software. I enjoy working across e-commerce and enterprise projects to turn ideas into maintainable products. I thrive in cross-functional teams, collaborating with product, design, and QA to ship features that matter. My experience spans UI components, GraphQL/API work, and test design, supported by hands-on practice with TypeScript, PHP, MySQL, and AWS, always aiming for quality and sustainability in code and processes.

Kotomi Watanabe

Hi, I’m Kotomi Watanabe, a full-stack web developer with a focus on React and NestJS. Over the past two years in the Japanese IT industry, I’ve built robust frontend and backend solutions, implemented UI/UX touches, and contributed to API development and testing to deliver reliable software. I enjoy working across e-commerce and enterprise projects to turn ideas into maintainable products. I thrive in cross-functional teams, collaborating with product, design, and QA to ship features that matter. My experience spans UI components, GraphQL/API work, and test design, supported by hands-on practice with TypeScript, PHP, MySQL, and AWS, always aiming for quality and sustainability in code and processes.

Available to hire

Hi, I’m Kotomi Watanabe, a full-stack web developer with a focus on React and NestJS. Over the past two years in the Japanese IT industry, I’ve built robust frontend and backend solutions, implemented UI/UX touches, and contributed to API development and testing to deliver reliable software. I enjoy working across e-commerce and enterprise projects to turn ideas into maintainable products.

I thrive in cross-functional teams, collaborating with product, design, and QA to ship features that matter. My experience spans UI components, GraphQL/API work, and test design, supported by hands-on practice with TypeScript, PHP, MySQL, and AWS, always aiming for quality and sustainability in code and processes.

See more

Experience Level

Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
See more

Language

Japanese
Fluent
English
Intermediate

Work Experience

Backend Developer at Experience Beyond Works Inc.
February 1, 2024 - April 1, 2025
Developed GraphQL APIs and server-side batch processes for advertising feeds using TypeScript (NestJS). Participated in end-to-end testing: unit, integration, and system tests. Addressed deprecation issues during PHP 8.x upgrade (warning fixes). Reviewed test case documents and assisted with test data preparation.
Frontend Developer at Experience Beyond Works Inc.
August 1, 2023 - January 31, 2024
Built UI components (modals, social share features) using React and TailwindCSS. Implemented GA4 custom event tracking via gtag.js. Integrated GraphQL queries and collaborated closely with planning and design teams. Documented specifications and development notes for handover.
QA Tester at Experience Beyond Works Inc.
February 1, 2023 - July 31, 2023
Created test cases and performed system testing (black-box testing). Filed bugs and coordinated with developers for issue resolution. Reviewed and updated test documentation.
QA Tester at Experience Beyond Works Inc.
December 1, 2022 - January 31, 2023
Built LAMP environment and developed CRUD functionality using PHP7. Studied Laravel MVC concepts and practiced MySQL (DDL). Covered entire SDLC from requirement analysis to testing in a team-based simulation.

Education

Add your educational history here.

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Retail, Professional Services

Experience Level

Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
See more