JR-204090 React Developer Middle

Customertimes Corp.; Hinoba-an; On-site; PHP 1,004,000 - 1,451,000; Full time

Job summary

Customertimes Corp. is seeking a skilled React Developer to join our front-end engineering team.

You will build responsive, high-performance interfaces for healthcare data analytics and clinical research platforms used by researchers, clinicians, and life-sciences stakeholders worldwide. You will translate complex data and workflows into intuitive digital experiences, implement state management, and collaborate across product, design, and backend teams to deliver reliable, accessible software

Qualifications

• 4+ years of professional experience developing with React.js.
• In-depth knowledge of HTML5, CSS3, and modern front-end tooling.
• Thorough understanding of React core principles — JSX, Virtual DOM, hooks, and component lifecycle.
• Experience with state management workflows such as Redux, Redux Toolkit, or Flux.
• Familiarity with TypeScript is highly desirable.
• Experience consuming RESTful APIs and/or GraphQL.
• Proficiency with version control tools (Git).
• Experience with front-end build tools (Webpack and Vite) and CI/CD pipelines.

Responsibilities

• Develop new user-facing features using React.js, translating wireframes and UX designs into high-quality, production-ready code.
• Build reusable components and front-end libraries/design systems for use across multiple Customertimes products.
• Integrate front-end applications with RESTful APIs / GraphQL services and backend systems handling large-scale healthcare and clinical trial data.
• Implement and maintain state management solutions (Redux, Redux Toolkit, Context API, or React Query).
• Diagnose and troubleshoot bugs, UI defects, and performance issues in existing applications.
• Write unit, integration, and end-to-end automated tests (Jest, React Testing Library, and Cypress) to ensure code quality and reliability.
• Participate in code reviews, sprint planning, and agile ceremonies; collaborate with product managers, UX designers, backend engineers, and QA.
• Ensure applications meet WCAG compliance, security, and data-privacy requirements appropriate for healthcare/life-sciences platforms.
• Contribute to technical documentation and coding standards; mentor junior developers as needed.

Job description

We are looking for a skilled React Developer to join our front-end engineering team, working on customer-facing and internal platforms that support clinical research, healthcare data analytics, and real-world evidence generation. You will build responsive, high-performance, and easy-to-use user interfaces used by researchers, clinicians, and life-sciences stakeholders worldwide, translating complex healthcare data and workflows into intuitive digital experiences.

Job Responsibilities:

• Develop new user-facing features using React.js, translating wireframes and UX designs into high-quality, production-ready code;
• Build reusable components and front-end libraries/design systems for use across multiple Customertimes products;
• Integrate front-end applications with RESTful APIs / GraphQL services and backend systems handling large-scale healthcare and clinical trial data;
• Implement and maintain state management solutions (Redux, Redux Toolkit, Context API, or React Query);
• Diagnose and troubleshoot bugs, UI defects, and performance issues in existing applications;
• Write unit, integration, and end-to-end automated tests (Jest, React Testing Library, and Cypress) to ensure code quality and reliability;
• Participate in code reviews, sprint planning, and agile ceremonies; collaborate closely with product managers, UX designers, backend engineers, and QA;
• Ensure applications meet WCAG compliance, security, and data-privacy requirements appropriate for healthcare/life-sciences platforms;
• Contribute to technical documentation and coding standards; mentor junior developers as needed.

Requirements:

• 4+ years of professional experience developing with React.js;
• In-depth knowledge of HTML5, CSS3, and modern front-end tooling;
• Thorough understanding of React core principles — JSX, Virtual DOM, hooks, and component lifecycle;
• Experience with state management workflows such as Redux, Redux Toolkit, or Flux;
• Familiarity with TypeScript is highly desirable;
• Experience consuming RESTful APIs and/or GraphQL;
• Proficiency with version control tools (Git);
• Experience with front-end build tools (Webpack and Vite) and CI/CD pipelines;

Additional Comments:

• Prior experience in healthcare, life sciences, pharma, or clinical research technology (e.g., eCOA, CTMS, and EDC systems);
• Familiarity with data-privacy and compliance considerations (HIPAA, GxP, and 21 CFR Part 11);
• Strong communication skills and ability to translate business/clinical requirements into technical solutions;
• Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent practical experience).