Sr.Frontend Developer

Sr.

Frontend Developer (Berkeley Heights, NJ, 07922) | 05/26/26

Job Description Job Title :

Sr.

Frontend Developer.

Location Berkley Heights NJ Job 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-Have Native iOS/Android development familiarity. Experience generating/signing wallet passes, JWT workflows, or HSM integrations. Prior fintech or payments domain experience. Technical Environment

Frontend:

React 18, Next.js, TypeScript, Redux

Styling:

Material-UI, Emotion/Styled Components

Testing:

Jest, React Testing Library

CI/Deployment:

Docker, shell scripts, AWS CLI, CI providers (GitHub Actions/Jenkins/etc.), SonarQube

Monitoring:

Datadog. Sr.

Frontend Developer1TYPESCRIPT, Automation, Amazon Web Services, Jenkins, ReactJs, docker, USER

EXPERIENCE, POWER

APPS, GitHub, SonarQube, ADOBE ANALYTICS, Continuous Integration, Datadog, React Redux, Shell Script, Next.

Js, iOS Applications, Web Content Accessibility Guidelines, Software Quality, Session Management, Integration tests, Code Review, FinTech, ESLint, Fault Tolerance, Team Working, Safety Principles, Coordination Skills, Software Debugging, Front End Software Development, JavaScript (Programming Language), Testing Skills, Cross-Origin Resource Sharing (Ajax Programming), Data Logging, Bash Shell, Cross-Site Request Forgery, Tooling Assembly and Dismantling, Android Software Development, React Testing Library, Aws Command Line Interface (CLI), Computer-Aided Audit Tools, Dubbing (Filmmaking), Google Wallet, Progressive Enhancement, Screen Reader, Semantic HTML, Tablet Computers C2CUnited States