Middle Frontend Developer

Develop and maintain web applications using React.

js and GraphQL Collaborate with designers and backend developers to build scalable, high-performance applications Write clean, maintainable, and efficient code following best practices Implement responsive and user-friendly UI components Optimize applications for performance and scalability Debug and troubleshoot issues across multiple browsers and devices Participate in code reviews and contribute to team knowledge-sharing (Optional) Write and maintain end-to-end tests using Playwright 2+ years of experience in front-end development with React.

js Strong understanding of JavaScript (ES6+), HTML5, and CSS3 Hands-on experience with GraphQL (Apollo Client or similar) Familiarity with React Hooks, Context API, Redux (optional) Experience with RESTful APIs and third-party integrations Understanding of component-based architecture and state management Knowledge of performance optimization and debugging techniques Upper-Intermediate English level Bachelor’s degree in Computer Science or related field WILL BE A PLUS Experience with Playwright or other automated testing frameworks Familiarity with CI/CD pipelines and DevOps practices PERSONAL PROFILE Detail-oriented developer with a passion for creating seamless user experiences Strong problem-solving skills and ability to work in a collaborative environment Proactive in identifying performance improvements and UI enhancements Do you enjoy building sleek, high-performance web applications?

We are looking for a Middle Frontend Developer to join our Front-end Development Team . This is a full-time remote opportunity based in Brasília, Federal District, Brazil, with flexibility to work from anywhere. At Sigma Software , we partner with global innovators to deliver cutting-edge solutions across industries.

In this role, you will work on modern web applications using React. js and GraphQL, collaborating with talented designers, backend developers, and QA engineers to create seamles