We are looking for a Middle Frontend Engineer (React) to join one of our projects on a part-time, project-based basis. The project involves developing and improving a web application with a strong focus on document and file management, including file visualization, previews, and user interactions.

Requirements 2+ years of commercial frontend development experience. Strong proficiency in React, TypeScript, JavaScript (ES6+). Experience with state management and modern React architecture. Solid understanding of REST APIs and frontend-backend integration. Experience building complex, interactive user interfaces. Knowledge of frontend performance optimization. Ability to work independently, estimate tasks, and propose technical solutions. Experience with Git and collaborative development workflows.

Nice to Have Experience with Document Management Systems (DMS) or document-heavy applications. Experience implementing file viewers and previews (PDF, images, Office documents, etc.). Familiarity with libraries such as PDF.js, React PDF, or similar solutions. Experience with file uploading, downloading, versioning, and document-related workflows. Experience building interactive document viewers with annotations, highlighting, or other advanced features. Understanding of handling large files and optimizing document rendering performance.

Responsibilities Develop and maintain frontend functionality using React and TypeScript. Implement and improve file management interfaces and document preview components. Integrate frontend features with backend APIs. Build responsive, user-friendly interfaces for complex workflows. Participate in technical discussions and suggest implementation approaches. Ensure code quality, maintainability, and frontend performance.

What We Offer Part-time, project-based cooperation with a flexible workload. Fully remote work. Flexible working hours. Direct communication with the technical team. Opportunity to work on technically challenging features involving document processing and visualization. Potential for further cooperation on other AltheraCode projects.