Senior Frontend React Developer - Part-time - EMEA/LATAM

About the Project

We’re building a clinical decision support software for radiology orders designed to streamline and improve the quality of diagnostic decision-making. The backend system- built with Node.js, Express, and hosted on AWS - is complete, with over 50 API endpoints and robust infrastructure including PostgreSQL and Redis.

We’re now seeking a Senior React Developer to take our existing UI mockup (built on Replit) and bring it to life by wiring it up to the backend, managing complex UI states, and ensuring responsive, reliable front-end functionality.

This is a critical role with an immediate start and potential for long-term collaboration on future radiology tech projects.

Responsibilities

• Connect existing React front-end components to backend API endpoints (Node.js, Express)
• Handle API requests with secure authentication (JWT or cookies)
• Implement and manage complex multi-step UI states (e.g., validation → feedback → submission)
• Display success messages, error handling, and loading states in a user-friendly manner
• Optimize API usage with tools like React Query or SWR
• Maintain HIPAA-compliant practices in front-end data handling and error reporting
• Ensure responsive, accessible design and performance
• Follow clean development practices (pull requests, GitHub branches, structured commits)
• Collaborate asynchronously with the founder and provide frequent progress updates

Requirements

• 5+ years of professional front-end development experience
• Strong proficiency in React.js and modern JavaScript (ES6+)
• Experience integrating front-end with RESTful APIs
• Comfortable with JWT or cookie-based authentication
• Proven ability to manage complex UI state flows
• Familiarity with React Query, SWR, or similar libraries for efficient data fetching
• Experience working with Node.js backends (for integration purposes)
• Knowledge of HIPAA or other privacy-sensitive compliance standards (a strong plus)
• Strong attention to detail and UI fidelity
• Clean and maintainable Git workflow (branches, PRs, commits)

Nice to Have

• Experience working with PostgreSQL or Redis
• Background in healthcare, medical software, or clinical tools
• Familiarity with AWS-hosted environments
• Experience with Replit or similar mockup/prototyping tools