We are a digital platform revolutionizing online sales by offering sales funnels with fully integrated checkout and ultra-fast landing pages — all in an intuitive way, without redirects, ensuring high conversion rates and an improved customer experience. Our mission is to enable any business to build, in minutes, what would normally take days of development — with exceptional performance, attractive design, intelligent automations, and full integration. Focused on speed, usability, and efficiency, we aim for every visitor to become a customer. We are experiencing rapid growth. This means tight deadlines, shifting priorities as the business evolves, and abundant opportunities for learning, direct impact, and participation in designing the architecture, processes, and product as a whole. Our product already handles millions of transactions and is growing at an accelerated pace — and to sustain this evolution, we are seeking a **Senior Front-End React Developer** who enjoys high-scale challenges, performance optimization, and modern interface design. **On-site at our HQ in Campinas – SP** \- **CLT** **Responsibilities:** * Develop and enhance scalable, high-performance web interfaces using React, TypeScript, and front-end best practices. * Ensure a consistent and accessible user experience across multiple devices. * Collaborate with designers, backend developers, and product teams to continuously evolve our ecosystem of digital solutions. * Implement automated tests, conduct code reviews, and contribute to front-end engineering standards. **Requirements:** * At least 5 years of front-end development experience. * Strong expertise in **React**, **TypeScript**, HTML5, CSS3, and best practices for reusable components. * Experience integrating with REST and GraphQL APIs. * Familiarity with distributed systems and **CI/CD** pipelines. * Proactive, collaborative, and hands-on mindset. * On-site at our HQ in Campinas – SP. **Nice-to-have:** * Experience with front-end testing frameworks (Jest, React Testing Library). * Knowledge of web performance, rendering optimization, and monitoring (observability). * Prior experience in startups or fast-growing companies, where adaptability and an entrepreneurial mindset are essential. * Experience in UX/UI and close collaboration with design teams. **Why join us?** * A fast-growing startup environment with significant career advancement opportunities. * Lean teams, real technical challenges, and freedom to propose solutions. * Direct involvement with the product and visible impact on the business. **Benefits:** * Amil health insurance * Dental insurance * Meal voucher (VA), transportation voucher (VT) Job type: Full-time CLT Salary: R$13\.560,48 \- R$15\.737,80 per month Benefits: * Dental assistance * Meal voucher * Transportation voucher