jpmc-dev9.fa.oraclecloud.com/CX
Software Engineer III - Front-End Developer - ReactJS
- Compensation
- Not disclosed
- Location
- Ciudad Autónoma de Buenos Aires, Argentina
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 5+ years
- Category
- Frontend
- Posted
Skills
Must have
- Professional experience building production-grade React applications (typically 5+ years or equivalent depth).
- Strong JavaScript and TypeScript fundamentals; ESNext, modules, and typing best practices. Deep experience with Redux/Redux Toolkit and app-level state architecture; familiarity with coordinating Redu
- Hands-on experience integrating GraphQL in production front-ends (Apollo Client or urql): queries, mutations, subscriptions, fragments, cache normalization and policies, pagination strategies, error b
- Testing expertise across unit, integration, and component tests; familiarity with mocking GraphQL operations and contract testing.
- Solid grasp of web fundamentals: semantic HTML, modern CSS (CSS-in-JS, Modules, or utility-first), responsive design.
- Front-end build tooling (Webpack/Vite), package managers, and linting/formatting (ESLint, Prettier).
- Understanding of auth flows (OAuth/OIDC, JWT), secure storage patterns, and front-end security basics (CSP, CORS, security headers).
- Version control with Git and collaborative development in Agile environments.
- Ability to effectively use AI coding assistants (e.g., GitHub Copilot, LLM Suite) and craft clear, context-rich prompts to improve productivity, code quality, and problem-solving efficiency.
Nice to have
- Micro-frontend architectures (Webpack Module Federation, single-spa, import maps); experience with shared runtime and dependency governance.
- Monorepo tooling (Nx, Turborepo) and shared UI libraries/design systems (Storybook). Node.js for front-end build tooling or BFFs; familiarity with GraphQL gateways and schema stitching/federation conc
- Observability for front-end (metrics, logging, tracing, error monitoring) and feature flagging/experimentation.
- Advanced accessibility expertise (ARIA patterns, keyboard navigation, screen reader support).
- Cloud and CDN basics; understanding of edge caching and performance optimization for APIs and assets.
Full description
About the role
We’re seeking a 602 Software Engineer to build and evolve modern web applications using React and Redux, with a primary focus on GraphQL for data access. You’ll collaborate with product, design, and platform teams to deliver secure, performant, and accessible user experiences at scale. Experience with micro-frontend (MFE) architectures is a plus.
What you’ll do
- Build, test, and maintain responsive React applications using modern patterns (hooks, functional components, context where appropriate).
- Implement predictable state management with Redux/Redux Toolkit, including middleware, selectors, and efficient store design; integrate cleanly with GraphQL client caches.
- Integrate with GraphQL services using Apollo Client or urql: define queries, mutations, and subscriptions; manage normalized caching, pagination (cursor/relay style), error handling, retries, and optimistic updates.
- Partner with backend teams on schema and API contracts (SDL), versioning, and performance patterns (query batching, persisted queries, avoiding n+1 issues).
Partner with design to implement accessible (WCAG-compliant) and consistent UI aligned to a design system.
- Write high-quality, well-tested code (Jest, React Testing Library); automate via CI/CD and follow trunk-based development or GitFlow as applicable.
- Profile and optimize performance (bundle size, code splitting, memoization, virtualization, lazy loading) and GraphQL network usage (field-level policies, cache keys).
- Participate in architecture/design reviews, code reviews, and contribute to shared libraries and component systems.
Document components and patterns for reusability; mentor peers and contribute to engineering best practices.
- Leverage AI-assisted development tools and prompt engineering techniques to accelerate coding workflows, generate boilerplate, write tests, refactor code, and improve documentation quality.
Must-have qualifications
- Professional experience building production-grade React applications (typically 5+ years or equivalent depth).
- Strong JavaScript and TypeScript fundamentals; ESNext, modules, and typing best practices.
Deep experience with Redux/Redux Toolkit and app-level state architecture; familiarity with coordinating Redux state and GraphQL client caches.
- Hands-on experience integrating GraphQL in production front-ends (Apollo Client or urql): queries, mutations, subscriptions, fragments, cache normalization and policies, pagination strategies, error boundaries, and GraphQL Code Generator.