Top Front End Developer Jobs in Sao Paulo

Lead the Pro team to design, develop, and deliver frontend systems for Kraken's trading interface, focusing on user experience and mentoring engineers.

Build and maintain high-performance, accessible React web applications; create reusable components and scalable frontend architectures; integrate with REST and GraphQL backends; optimize for speed and SEO; collaborate with designers and cross-functional teams; participate in code reviews and architecture discussions.

Implement and modernize UI across an enterprise web application: apply new stylesheets, layouts, and screen redesigns while preserving functionality. Enhance existing screens as part of UX modernization, ensure responsiveness, accessibility, cross-browser compatibility, and high code quality. Collaborate with designers, developers, and stakeholders, and participate in testing and troubleshooting.

The Staff/Lead Fullstack Engineer will enhance the Mimica Webapp by architecting scalable UI components, managing large datasets, and optimizing performance while collaborating with cross-functional teams.

The Front End Developer will create and develop UI solutions, optimize client-side performance, participate in solution architecture, and support ongoing projects.

Lead frontend architecture for Clara Builders (Next.js 15, React, TypeScript), extend backend/infra (Prisma/Postgres, deploy pipeline), work on the Cloudflare AI Gateway and agent infrastructure (Figma-to-code MCP, documentation agents, n8n automations), design and ship new AI tooling (OAuth clients, unified access), and raise technical standards across the pod through ownership and code review.

Develop, maintain, and enhance React-based frontend applications; integrate RESTful APIs; implement automated tests; participate in code reviews; collaborate with cross-functional teams and CI/CD pipelines to deliver high-quality software.

Build and evolve a modular microfrontend portal using Vue 3 and TypeScript. Integrate REST APIs and BFFs, implement observability and performance monitoring, maintain the Design System, write component and end-to-end tests, and collaborate with cross-functional teams to deliver secure, maintainable, high-performance features.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

Implement and maintain web applications using JavaScript, ReactJS, and related technologies. Participate in all development phases and troubleshoot production issues.

Develop and maintain responsive web applications, implement component architectures, and ensure accessibility while collaborating in Agile teams.

As a Senior Front End Engineer, you'll architect and develop scalable web applications, mentoring peers and embracing AI-assisted development to enhance productivity and code quality.

As a Front End Engineer, you will develop responsive web interfaces, contribute to feature development, collaborate in team settings, and integrate AI tools for enhanced productivity.

As a Frontend Engineer, you'll develop high-performance applications using React Native and React.js, collaborating with cross-functional teams to meet client needs.

As a Frontend Engineer, you will create and maintain products, collaborate with teams, design experiments, and enhance customer experiences.

As a Senior Frontend Engineer, you will design and build web applications, owning major UI projects, collaborating with cross-functional teams, and optimizing performance for a seamless user experience.

As a Staff Fullstack Software Engineer, lead technical strategy, system evolution, operational excellence, and mentor teams while promoting wellbeing at work.

Design and implement component-based, data-driven frontends using React and TypeScript. Transform and normalize backend/analytics data, manage state with Redux, produce pixel-perfect UIs from designs, follow project standards, work ticket-driven (Azure DevOps/Jira), participate in code reviews, and own features end-to-end including QA and bug fixes.

Build responsive, accessible Next.js and React applications for marketing storefronts and clinical platforms. Implement Figma designs, optimize Core Web Vitals, manage client-side state, integrate REST and real-time services, and create AI-powered conversational interfaces while following HIPAA/SOC2 security practices.

Lead front-end engineer on the Mapper Team building scalable data-visualization and real-time multi-user front-end features. Own end-to-end projects, contribute to architecture and processes, mentor peers, participate in hiring, and deliver high-performance, testable, maintainable UI code.

As a Senior Frontend Engineer, you will manage core user experiences on the Made platform, using Flutter and React. Your role includes feature ownership, collaboration with teams, mentoring junior engineers, and contributing to technical standards and architecture.

The role involves building creative tools for content editing, enhancing features with PixiJS and WebGL, and improving collaboration workflows.

Design and evolve a scalable frontend platform used across multiple React applications. Build reusable capabilities (auth, state, networking), optimize performance and observability, enforce testing and accessibility standards, participate in architecture reviews, and mentor engineers to improve developer experience and cross-application reliability.

Build and maintain responsive, accessible web interfaces for a consumer health platform using React and TypeScript. Translate designs into performant UI, create reusable components, integrate REST/GraphQL APIs, collaborate with product/design/backend teams, participate in code reviews, and optimize frontend performance across devices and browsers.

Lead the frontend development team, design solutions for complex scenarios, mentor engineers, and ensure reliable, scalable user-centric solutions for Wellhub's platform.