4i Americas

Required qualifications, capabilities, and skills

•             14+ years professional software engineering experience with significant depth in front-end web development; experience leading projects and mentoring engineers.

•             Expert-level React proficiency (hooks, component composition, context, rendering behavior, concurrency-related patterns where applicable).

•             Strong TypeScript skills (types-as-design, generics, strictness strategies) and modern JavaScript fundamentals.

•             Strong Java and Java Spring skills to develop microservices / API contracts (GraphQL/REST) using Java and Spring technologies and front-end friendly design patterns (pagination, filtering, error models).

•             Deep experience with modern front-end tooling: Vite/Webpack, Babel/SWC, npm/pnpm/yarn, monorepos (optional), and build/release pipelines.

•             Strong CSS skills: responsive design, CSS architecture (CSS Modules, CSS-in-JS, or utility frameworks), theming, and consistent styling at scale.

•             Advanced testing practices: Jest/Vitest, React Testing Library, Playwright/Cypress for E2E; test strategy ownership.

•             Accessibility expertise: WCAG/ARIA, keyboard navigation, screen-reader considerations, and automated + manual a11y testing.

•             Performance engineering: profiling, bundle splitting, SSR/CSR trade-offs, caching strategies, and Core Web Vitals optimization.

•             API integration expertise with GraphQL and REST (schema-driven development, error handling, pagination, caching, and client state strategies).

•             Security awareness for web apps: XSS/CSRF prevention, dependency hygiene, secure auth/session patterns (OIDC awareness a plus).

•             Observability for the front end: client-side logging/metrics, error reporting, and debugging production issues.

•             MUST: Proficiency using AI-assisted engineering tools (e.g., Claude Code, GitHub Copilot) to accelerate implementation, refactoring, test creation, and debugging—while validating correctness and adhering to secure handling practices.

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Preferred qualifications

•             Experience with SSR/meta frameworks: Next.js / Remix and SEO considerations.

•             Experience leveraging a design system (Storybook, tokens).

•             Experience with micro-frontend patterns and module federation (where relevant).

•             Experience with visualization and rich UI: D3, Canvas/WebGL, advanced tables/grids, animation libraries.

•             Familiarity with authentication integrations (OIDC/OAuth2) and enterprise SSO constraints.

•             Proven track record modernizing legacy front ends and improving developer experience (DX).