Senior Frontend Engineer (React) - Web UI / API Integration

Senior Frontend Engineer (React) – Web UI / API Integration
Location: Hybird NYC
NO Candidates
Min 15+ years Mandatory

We are hiring a Senior Frontend Engineer for a long-term financial services client engagement. The role focuses on building resilient, SSR-first React applications within a micro frontend architecture.

Key Responsibilities:

• Develop scalable frontend features using React 18, TypeScript, and micro frontends

• Integrate GraphQL and REST APIs with strong error handling and data validation

• Manage server state using TanStack Query and client/UI state using Redux Toolkit

• Build reusable, well-typed components and domain models

• Write unit and integration tests using Jest and React Testing Library with 100% code coverage

• Collaborate in Agile Scrum teams, code reviews, and Git-based workflows

Main Skills Required:

• React 18+, Hooks, Suspense, Concurrent Rendering

• TypeScript (Generics, Discriminated Unions, Advanced Types)

• Redux Toolkit & TanStack Query

• GraphQL & REST API Integration

• Jest & React Testing Library

• API error handling, validation, retry strategies

• Strong understanding of SSR and Micro Frontend architecture

• Git, Agile Scrum, Code Review best practices

Nice to Have:

• Apollo Client

• Experience in Financial Services domain

• Understanding of HTTP semantics, auth boundaries, and GraphQL performance concerns