{"id":3276980,"url":"https://alion.io/job/cit-senior-frontend-developer-react-brazil","title":"Senior Frontend Developer (React), Brazil","company":{"id":957,"name":"CI&T","domain":"ciandt.com","url":"https://alion.io/company/ciandt","size_band":"5000+","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":97,"open_postings":21,"ghost_share":0,"stale_share":0.333,"repost_share":0,"time_to_fill_p50_days":14,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Brazil"],"countries":["BR"],"hiring_countries":["BR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"ESLint","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"Jest","optional":false},{"name":"Kanban","optional":false},{"name":"Prettier","optional":false},{"name":"Radix UI","optional":false},{"name":"React Router","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"shadcn/ui","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TanStack Router","optional":false},{"name":"TypeScript","optional":false},{"name":"Vite","optional":false},{"name":"Vitest","optional":false},{"name":"Zod","optional":false},{"name":"Cypress","optional":true},{"name":"Figma","optional":true},{"name":"JavaScript","optional":true},{"name":"Playwright","optional":true},{"name":"Storybook","optional":true},{"name":"TanStack Form","optional":true},{"name":"Zustand","optional":true}],"status":"closed","first_seen_at":"2026-10-26T13:28:58Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-28T13:38:46Z","board_verified":false,"closed_at":"2026-10-28T13:38:46Z","days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"We’re looking for a Senior Frontend Developer to join a CI&T squad working on a financial services client. You’ll help move an established Java-based web application onto a modern React frontend: analysing legacy pages, turning them into a well-structured component library, and building fast, accessible user interfaces. You’ll work closely with backend developers, UX/UI designers, QA and the Product Owner.\nWhat you’ll do\n- Build and maintain responsive, accessible user interfaces with React and TypeScript\n- Analyse legacy server-rendered pages and break them down into reusable React components\n- Grow and maintain a shared component library based on shadcn/ui\n- Connect the frontend to backend REST APIs: handle loading, error and empty states consistently\n- Write unit and component tests with Vitest/Jest and React Testing Library\n- Join refinement sessions: break features into tasks, estimate them and point out UX or technical risks\n- Review pull requests and help keep frontend standards, performance and documentation in good shape\n- Work with designers to turn designs into pixel-accurate, consistent interfaces\nWhat you need (must-have)\n- Around 5 years of professional frontend experience, with at least 3 years in React (hooks, context, composition patterns)\n- Strong TypeScript, HTML5 and modern CSS skills\n- Hands-on experience with Vite: project setup, environment configuration and build optimisation\n- Experience with shadcn/ui and the tools beneath it, Tailwind CSS and Radix UI\n- Solid automated testing skills with Vitest and/or Jest, ideally with React Testing Library\n- Experience consuming REST APIs: authentication, error handling and pagination\n- Good grounding in web accessibility (WCAG) and responsive design\n- Experience with routing (e.g. React Router or TanStack Router) and form validation (e.g. Zod)\n- Familiarity with linting and formatting (ESLint, Prettier), Git workflows and CI/CD pipelines\n- Experience working in agile teams (Scrum or Kanban)\n- Good English communication skills for working with international stakeholders\nNice to have\n- Storybook, for documenting and developing components in isolation\n- Zustand, for client-side state management\n- TanStack Query, for server state, caching and data synchronisation\n- TanStack Form, for complex, type-safe forms\n- Analysing legacy pages (e.g. JSP, XSLT/XML-rendered or server-side templates) and restructuring them into React components\n- End-to-end testing with Playwright or Cypress\n- Design systems and design tokens, and working from Figma\n- Frontend performance work: Core Web Vitals, code splitting and lazy loading\n- Basic understanding of Java web backends and how they serve and secure the frontend\n- Experience in banking or other regulated environments","description_format":"text","description_chars":2760,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"Brazil","iso":"BR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Custom Software 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