hyperexponential

Senior Frontend Engineer

hyperexponential

full-time

Posted on:

Origin:  • 🇵🇱 Poland

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Job Level

Senior

Tech Stack

JavaScriptJestPythonReactTypeScript

About the role

  • Own the development, enhancement, and support of workflow-related UI features in hx Renew’s frontend—using and extending hx’s design system and component library (shadcn + tailwindcss).
  • Implement, and maintain accessible UI components for complex user journeys.
  • Collaborate with backend engineers and product specialists to clarify requirements and deliver user-friendly solutions.
  • Work closely with designers to translate Figma mockups into production-ready components using hx’s design system.
  • Engage with frontend engineers from other hx teams in a leading role: share pattern updates, participate in code reviews, uphold and improve consistency and standards, and support growth of less-experienced colleagues.
  • Support continual improvement of the team’s Product Domain through proactive UI/UX and usability fixes.
  • Write and maintain unit and integration tests; support CI/CD reliability.
  • Contribute documentation and share knowledge related to both the team and the wider frontend engineering community at hx.

Requirements

  • Solid understanding of modern software architecture principles and best practices applied to frontend/web development, including component design, state management, scalability, and maintainability.
  • Proficient in JavaScript/TypeScript and React (primary hx frontend stack).
  • Experience building and maintaining complex, multi-page SPAs in a commercial setting.
  • Capable of extending/maintaining a shared component library, following design tokens and accessibility best practices.
  • Skilled in developing, debugging, and optimising UI components for rich business logic (including API integration and data-heavy workflows).
  • Able to work independently or collaboratively in your domain, leveraging knowledge from a distributed community of frontend engineers.
  • Familiarity with frontend tooling: vitejs, nx, jest, vitest, testing library.
  • Competent in test design and maintenance (unit, component, CI/CD).
  • Strong written and verbal communication skills; able to communicate effectively in English.
  • Background checks will be conducted as part of the hiring process.
  • Visa sponsorship not available (applicants must be eligible to work in the location).
  • Bonus points for:
  • Practical experience extending or customising shadcn/ui components in production.
  • Experience implementing UIs using component libraries and design systems—specifically, with tailwindcss and ideally shadcn.
  • Experience implementing accessibility and performance optimisations—especially using tailwindcss utility classes.
  • Experience with B2B SaaS, ideally in insurance or finance domains.
  • Contributions to shared frontend infrastructure or internal documentation.