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.

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

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.

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.

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

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 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 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 mobile-first, responsive Vue.js frontends focused on performance and UX. Contribute to backend management UIs, participate in code reviews and team ceremonies, and mentor junior engineers.

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

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.

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.

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.

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

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.

Lead frontend development for proposals, invoicing, payments, contracts, and time tracking. Design component-driven architectures with React and TypeScript, integrate with REST APIs and backend services, optimize performance and cross-browser reliability, ensure testing and accessibility, and collaborate with Product and Design to deliver polished, internationalized SaaS experiences.

Lead the Design System mobile team to improve developer productivity and design consistency. Architect scalable, maintainable, accessible frontend solutions, mentor engineers, coordinate cross-functional work, and serve as a technical and communication focal point across the company.

Own and architect the end-to-end e-commerce frontend (product pages, cart, checkout, CMS), optimize performance and reliability at scale, partner with product/design, leverage AI-assisted workflows, refine CI/CD and Vercel infrastructure, mentor engineers, and drive platform and tooling decisions.

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.

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.