Senior / Lead Frontend Engineer (Next.js, React & Web Platforms) - Brazil

7+ years of frontend or full-stack experience with strong frontend focus. Proven experience building production websites, not just internal apps. Deep expertise in Next.js and React, including SSR/SSG/ISR. Strong understanding of SEO, performance, accessibility, and analytics. Experience working with CMSs, design systems, and marketing stakeholders. Comfortable operating at Staff+/Lead level, influencing across teams.

Own the frontend technical vision across marketing websites, landing pages, and web applications. Define standards for site architecture, routing, content rendering, and performance. Make architectural decisions around SSR, SSG, ISR, caching, and edge delivery in Next.js. Build and maintain high-performance websites with Next.js and modern frontend tooling. Own implementation of SEO best practices, structured data, metadata, and sitemap generation. Optimize for Core Web Vitals, page speed, and global delivery. Integrate with CMS platforms. Build reusable patterns for landing pages, pricing pages, and content-driven experiences. Lead development of complex frontend systems using Next.js and React. Establish scalable component architecture and design systems shared across sites and apps. Define state management and data-fetching strategies. Ensure clean separation of presentation, state, and business logic. Own frontend performance budgets and optimization strategies. Drive accessibility (WCAG), responsiveness, and cross-browser compatibility. Implement testing strategies across websites and applications. Ensure consistent quality across marketing and product surfaces. Partner closely with product, design, and growth teams to support experimentation and iteration. Enable A/B testing, analytics instrumentation, and conversion tracking. Translate brand and design systems into scalable frontend implementations. Support rapid iteration without sacrificing technical quality. Act as a frontend authority and mentor to other engineers. Review high-impact changes and guide architectural decisions. Raise the frontend bar through standards, documentation, and example. Support hiring and frontend technical interviews. Work closely with backend and platform teams on APIs, caching, and data contracts. Optimize client-server boundaries and edge behavior. Improve build performance, deployments, and runtime reliability.