Senior Frontend Developer (React)

**This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Frontend Developer (React) in Brazil.** This is an exciting opportunity for a seasoned frontend developer to build high\-impact web applications in a fast\-moving, product\-focused environment. You will take ownership of developing modern, scalable user interfaces while ensuring performance, reliability, and maintainability. Working closely with product, design, and backend teams, you’ll transform complex ideas into intuitive user experiences. The role emphasizes both engineering excellence and strong testing practices, giving you end\-to\-end responsibility for quality delivery. You’ll have the chance to work with cutting\-edge tools and continuously evolve your technical expertise. This position is ideal for someone who thrives in a collaborative setting, enjoys solving complex problems, and is passionate about delivering exceptional frontend experiences. **Accountabilities** * Design and develop user\-facing features using React, JavaScript, and TypeScript, ensuring high performance and responsiveness * Build reusable components and scalable UI libraries to support long\-term product growth * Translate complex UI/UX designs into clean, efficient, and maintainable code * Collaborate cross\-functionally with product managers, designers, and backend engineers to deliver seamless solutions * Optimize applications for speed, scalability, and technical feasibility across different environments * Lead automated testing initiatives, including writing and maintaining test scripts using tools like Cypress, Playwright, or Storybook * Conduct code reviews and enforce best practices to maintain high standards of code quality * Continuously improve existing codebases and address performance or usability issues proactively **Requirements** * 5\+ years of experience in frontend development with strong proficiency in JavaScript and TypeScript * Extensive experience building applications with React and Single\-Page Application architectures * Solid knowledge of HTML5, CSS3, and modern styling approaches such as SCSS, CSS\-in\-JS, or TailwindCSS * Hands\-on experience with GraphQL and tools such as Apollo * Proven experience with automated testing and visual regression tools (Cypress, Playwright, Storybook, or similar) * Ability to translate design concepts into high\-quality, production\-ready interfaces * Strong problem\-solving skills with attention to detail and a commitment to code quality * Excellent communication skills and ability to work effectively in a collaborative, remote environment * Experience with component libraries such as Ant Design is a plus; familiarity with cloud platforms or data visualization tools is an advantage **Benefits** * Fully remote work environment with flexible working arrangements * Opportunity to work in a fast\-growing, innovation\-driven tech environment * Collaborative and supportive team culture focused on continuous improvement * Structured onboarding and ongoing professional development opportunities * Career growth potential with exposure to modern technologies and tools * Regular team engagement activities and knowledge\-sharing sessions * Chance to work on meaningful products with real\-world impact Why Apply Through Jobgether? We use an AI\-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top\-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best! Why Apply Through Jobgether? Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre\-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.