xelys jobs xelys jobs

Senior Frontend Software Engineer

Haystack

seniorpermanentfrontend United States 66 days ago via LinkedIn

See how well this job matches your profile

Sign up to get an AI match score and generate a tailored application in seconds.

Get your match score

Tags

ReactTypeScriptMicro FrontendsRedux ToolkitReact QueryJestReact Testing LibraryOWASPSecurity RemediationFrontend Performance

About the role

Role Overview

You will develop and maintain enterprise React applications for critical business capabilities within a large, modernizing portfolio.

Responsibilities

  • Develop and maintain enterprise React applications supporting key business functions.
  • Build and enhance applications using a Micro Frontend architecture.
  • Modernize legacy React code and refactor class-based components.
  • Improve frontend performance, scalability, and maintainability across the portfolio.
  • Remediate frontend security vulnerabilities and support secure development practices.
  • Promote frontend engineering best practices and drive continuous improvement across teams.
  • Collaborate with backend engineers, UX partners, and product teams.

Requirements

  • Strong experience with React 18+ and TypeScript in large enterprise codebases.
  • Deep knowledge of React Hooks, Context API, and custom hooks.
  • Advanced TypeScript skills (e.g., generics and type-safe API integration).
  • Experience with state management such as Redux Toolkit and/or React Query.
  • Proficiency with Jest and React Testing Library for component/unit testing.
  • Familiarity with secure frontend development practices and OWASP guidance.

What’s Offered

  • Opportunity to work in a complex, dynamic enterprise environment.
  • Join a team responsible for maintaining, modernizing, and evolving a large application portfolio.
  • Contribute to significant refactoring efforts and help shape frontend engineering best practices.

About Haystack

Haystack partners with enterprise organizations to help modernize and scale their technology solutions, including large-scale frontend ecosystems. This role is with a Fortune 50 retail leader focused on delivering secure, high-quality user experiences across critical business functions.

Scraped 7/19/2026