Top Front End Developer Jobs in Rio de Janeiro

Lead design and implementation of scalable React front-end architecture, build and optimize UI components, integrate with GraphQL/REST APIs, collaborate cross-functionally, maintain code quality through reviews and testing, and deliver user-centric features for a 3D smartphone-camera product.

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.

The Senior Frontend Engineer will lead custom Shopify theme development, ensure quality coding, manage project tasks, and collaborate effectively with team members.

Design, develop, and maintain high-quality React applications, lead technical decisions, mentor engineers, and optimize performance in a fast-paced environment.

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.

Build responsive, pixel-perfect web interfaces from screenshots and component guides using TypeScript and CSS3. Implement design systems, ensure accessibility and performance, document decisions, identify design inconsistencies, and provide technical feedback to support AI-related projects.

Design and maintain secure, highly available Java/Spring Boot backend services for payments, optimize asynchronous transaction processing, integrate with payment networks, build React frontends and internal tools, apply AI to accelerate engineering workflows, mentor engineers, and implement observability and CI/CD.

Build and maintain responsive, high-performance React web applications; collaborate with product, design, and backend teams; integrate with microservices; optimize performance and accessibility; write tests and participate in code reviews; mentor junior engineers.

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

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

As a Senior Front-End Software Engineer, you'll design and implement services, contributing to the architecture and product strategy in a fast-paced environment.

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 role involves designing, building, and implementing new services, working closely with the product team, and taking ownership of projects from 0 to 1.

Lead frontend architecture and development using TypeScript, React, and Next.js. Architect AI-integrated, scalable frontends, design spec-driven solutions for AI agents, mentor engineers, integrate composable platforms and GCP services, ensure accessibility/performance/SEO, and partner with product, design, and clients to deliver production-ready experiences.

You will drive the product's frontend look and feel, build UIs for complex data, ensure consistent designs, and enhance development velocity. This role requires strong React/TypeScript skills, a builder's mindset, and a focus on performance and design sensibility.

The Senior Frontend Software Engineer will lead frontend feature releases, integrate AI tools, develop user interfaces, collaborate with backend teams, and improve team efficiency while ensuring code quality and performance.

Build and maintain the Quality Platform frontend to expose agentic testing capabilities. Translate AI-driven testing workflows into intuitive developer-facing UIs, visualize large-scale test data, improve developer and QE productivity, collaborate across backend/infrastructure/AI teams, write tests, and contribute to design and architecture documents.

Build and maintain the Quality Platform frontend that exposes agentic testing capabilities. Design intuitive UIs for running, orchestrating, and visualizing test results and coverage. Collaborate across backend, infrastructure, applied-AI, and QE teams to improve developer productivity and surface platform capabilities.

Build and maintain high-quality web and mobile interfaces using TypeScript and Next.js. Translate Figma designs into responsive, pixel-perfect code. Follow Clean Architecture, use design systems and Storybook, engage AI coding assistants to accelerate delivery, own features end-to-end, and collaborate with product, design, and engineering teams.

Build, ship, and own major parts of the product UI using React and Next.js. Design and optimize responsive, accessible interactive experiences. Collaborate with product, design, and backend teams, contribute to frontend architecture, performance, and component library, and elevate product quality through pragmatic, fast-moving execution.

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.

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.

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

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.

The Senior Frontend Engineer will develop and maintain microfrontend applications, collaborate on backend integration, and enhance the architecture of Cobre's financial platform while ensuring performance and security standards are met.