Software Engineer III Front-End Developer ReactJS

Buenos Aires - Argentina

Monthly Salary: Not Disclosed

Posted on: 22 hours ago

Vacancies: 1 Vacancy

Job Summary

Description

About the role
Were 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. Youll 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 youll 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 n1 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.
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).
for front-end build tooling or BFFs; familiarity with GraphQL gateways and schema stitching/federation concepts.
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.

How we work

Customer-centric iterative delivery with clear acceptance criteria and measurable outcomes.
Code reviews pair/mob programming as needed and continuous improvement through retrospectives.
Emphasis on reliability and resilience: meaningful monitoring alerting and on-call participation where applicable.

Required Experience:

DescriptionAbout the roleWere 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. Youll collaborate with product design and platform teams to deliver secure performant and accessible user experiences at sc...

Description

What youll 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 n1 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.
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).
for front-end build tooling or BFFs; familiarity with GraphQL gateways and schema stitching/federation concepts.
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.

How we work

Customer-centric iterative delivery with clear acceptance criteria and measurable outcomes.
Code reviews pair/mob programming as needed and continuous improvement through retrospectives.
Emphasis on reliability and resilience: meaningful monitoring alerting and on-call participation where applicable.

Required Experience:

Key Skills

Bootstrap
CSS
Front-End Development
HTML5
React
Redux
Node.js
Angular
Less
JavaScript
backbone.js
Sass

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JPMorganChase

JPMorganChase, one of the oldest financial institutions, offers innovative financial solutions to millions of consumers, small businesses and many of the world’s most prominent corporate, institutional and government clients under the J.P. Morgan and Chase brands. Our history spans ov ... View more

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