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Kstack
Frontend React DeveloperKstack • São Paulo, SP, BR
Frontend React Developer

Frontend React Developer

Kstack • São Paulo, SP, BR
Há 9 dias
Descrição da vaga

Role Summary

We are looking for a creative, detail-oriented Frontend React Developer with hands-on experience building dynamic, high-performance web applications. The ideal candidate has a strong foundation in front-end architecture, writes clean and maintainable code, and has a solid understanding of modern JavaScript frameworks and development practices.

In this role, you will leverage modern AI-powered productivity tools and work closely with UI/UX designers, back-end engineers, and global cross-functional teams to build scalable user interfaces and deliver exceptional user experiences.

Key Responsibilities

  • Design, develop, and maintain efficient, reusable, and reliable React.js components for enterprise web applications.
  • Partner with UI/UX designers to translate wireframes, mockups, and user stories into polished, high-quality user interfaces.
  • Optimize front-end applications for speed, performance, responsiveness, and cross-browser compatibility.
  • Integrate front-end applications with RESTful APIs, GraphQL endpoints, and back-end services.
  • Actively participate in code reviews, sprint planning, and daily stand-ups within an Agile development environment.
  • Troubleshoot and resolve front-end defects, memory leaks, and performance bottlenecks across modern browsers.
  • Create and maintain technical documentation, component libraries, and front-end development standards.
  • Stay current with emerging front-end technologies, web standards, and engineering best practices to drive continuous improvement.
  • Leverage AI-powered development tools to accelerate feature development, code refactoring, unit testing, and technical documentation.

Technical & Mandatory Skills

React & Front-End Core Stack

  • 3+ years of professional front-end development experience building modern web applications with React.js.
  • Strong proficiency in JavaScript (ES6+), TypeScript, HTML5, and CSS3/SCSS.
  • Solid understanding of state management tools and patterns, including Redux Toolkit, Context API, Zustand, or Recoil.
  • Hands-on experience with asynchronous request handling, API integration, and JSON data using Axios or the Fetch API.
  • Familiarity with modern front-end build pipelines and development tools, including Webpack, Vite, Babel, and npm/pnpm/yarn.
  • Strong understanding of responsive design frameworks and styling libraries such as Tailwind CSS, Material UI, Styled Components, or Bootstrap.
  • Experience with Git-based version control and development workflows using platforms such as GitHub, Azure DevOps, or GitLab.

Quality & Engineering Standards

  • Good understanding of testing frameworks and tools such as Jest, React Testing Library, or Cypress.
  • Understanding of browser rendering behavior, DOM manipulation, and front-end performance optimization techniques.

AI Tools Experience

Hands-on experience using modern AI-powered tools to improve developer productivity, including:

  • GitHub Copilot or Cursor for AI-assisted code generation and refactoring.
  • ChatGPT, Claude, or enterprise Generative AI assistants for rapid debugging, algorithm design, and technical documentation.
  • AI-powered tools for code analysis, testing, or code completion.

Preferred Qualifications

  • Exposure to modern React frameworks such as Next.js, as well as Server-Side Rendering (SSR) and Static Site Generation (SSG) concepts.
  • Familiarity with CI/CD pipelines for front-end application deployments.
  • Basic understanding of Web Content Accessibility Guidelines (WCAG) and SEO best practices.
  • Familiarity with Agile project management tools such as Azure DevOps or Jira.

Soft Skills

  • Communication: Strong written and verbal English communication skills, with the ability to collaborate effectively with global development teams.
  • Analytical Thinking: Strong problem-solving skills with excellent attention to detail and UI precision.
  • Ownership & Accountability: Ability to take ownership of features from technical task breakdown through production release.
  • Adaptability: Eagerness and ability to quickly learn new libraries, frameworks, and engineering tools.
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Frontend React Developer • São Paulo, SP, BR

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