Senior Frontend Developer

Job Title : Sr.Frontend Developer.Location Berkley Heights NJNo of positions:3Job Type : Contract Web App: Build and maintain React/Next.js components that run reliably inside iOS and Android webviews.Accessibility (ADA/WCAG): Ensure product accessibility to meet ADA and WCAG 2.1 AA standards; implement semantic markup, keyboard navigation, focus management, ARIA attributes, screen-reader compatibility (VoiceOver/TalkBack), and automated/manual accessibility testing.Shell Scripting & AWS Deployment: Author and maintain shell scripts and CLI tooling for build, deployment, and operations (Bash/zsh). Integrate with AWS tooling and CI/CD pipelines to automate releases, rollbacks, and environment promotion.Cross-Platform Collaboration: Coordinate with iOS/Android engineers to maintain reliable webview bridges, intents, and native callbacks; deliver platform-specific UX while maximizing shared code.State & Security: Manage Redux state flows for payment/pass data, ensure secure token handling, session management, and adherence to security/PCI considerations.Testing & Observability: Write unit/integration tests (Jest, React Testing Library), e2e tests for wallet and widget flows, and instrument critical paths with logging/monitoring (e.g., Datadog).Performance & UX: Optimize webview performance for low-power tablets and network-constrained environments; implement progressive enhancement and graceful degradation.Code Quality & Processes: Enforce best practices with ESLint, Prettier, Husky, code reviews, and SonarQube/CI checks.Required Skills & Experience Experience: 5+ years frontend engineering with strong TypeScript + React (v18+) + Next.js experience.State Mgmt: Deep knowledge of Redux and side-effect handling (thunks/sagas/observables).Wallet Expertise: Practical experience with Apple Wallet and Google Wallet/Passes or equivalent token/pass provisioning.Accessibility: Proven ability to deliver accessible applications compliant with WCAG 2.1 AA; experience running VoiceOver/TalkBack and accessibility audit tools.Shell & AWS: Proficient in shell scripting (Bash/zsh), AWS CLI, and common AWS services used in frontend delivery; experience automating deployments and troubleshooting CI/CD.Mobile WebView: Experience developing/debugging WebView-based apps and native-web interactions.Security & Compliance: Secure token handling, CORS, CSRF, secure storage patterns, and familiarity with fintech compliance basics.Testing & Tooling: Jest, React Testing Library, CI/CD familiarity, Docker basics, ESLint, Prettier.Styling & UX: Material-UI (v4/v5), Emotion/Styled Components, responsive and tablet-first design. Nice-to-HaveNative iOS/Android development familiarity.Experience generating/signing wallet passes, JWT workflows, or HSM integrations.Prior fintech or payments domain experience. Technical EnvironmentFrontend: React 18, Next.js, TypeScript, ReduxStyling: Material-UI, Emotion/Styled ComponentsTesting: Jest, React Testing LibraryCI/Deployment: Docker, shell scripts, AWS CLI, CI providers (GitHub Actions/Jenkins/etc.), SonarQubeMonitoring: Datadog.