SENIOR FRONTEND DEVELOPER (NEXT.JS AND REACT)

Job Title: Senior Frontend Developer (JavaScript, Next.js, React, AI Tools, A/B Testing) Location: Remote – Latin America Preferred (aligned with Spanish business hours 'CET') Type of Contract: Full-Time | Remote Salary Range: $3,800 – $4,800 USD/month Language Requirements: Native Spanish, C1 English We are seeking a skilled Senior Frontend Developer with strong experience in Next.js, React, and modern frontend architecture to join our growing team. You will play a key role in building high-conversion user interfaces, developing internal tools, and optimizing frontend performance. Your work will directly impact user experience, marketing effectiveness, and overall product scalability. Key Responsibilities: • Develop high-conversion, visually engaging interfaces using modern design and marketing best practices • Build and maintain frontend applications using Next.js, React, and TypeScript • Design and develop the frontend layer for internal tools and custom platforms • Ensure cross-browser and cross-device compatibility through rigorous testing • Participate in code reviews to uphold quality standards and best practices • Collaborate with Product, Marketing, Design, QA, and Operations teams • Write modular, reusable, and efficient code while continuously optimizing performance Must-Have Qualifications: • Strong experience with Next.js and the React ecosystem • Advanced proficiency in TypeScript for scalable frontend development • Solid understanding of NPM package management, including creation and optimization • Experience with AI-assisted development tools and integrating AI into workflows • Proven experience in frontend architecture with a modular design approach • Strong knowledge of RESTful APIs and/or GraphQL, including async JavaScript (Fetch, Axios) • Working knowledge of AWS and cloud-based application deployment best practices Preferred Qualifications: • Experience with frontend performance analysis and optimization • Familiarity with A/B testing methodologies and tools • Experience working with PHP/Twig in frontend templating environments • Strong collaboration skills with UI/UX and cross-functional teams • Autonomous, proactive mindset with strong problem-solving abilities Additional Notes: • Candidates must be comfortable attending meetings during Spanish business hours (9:00 AM – 5:00 PM CET) as required (not daily, but regularly enough to be a key consideration)