Jack and Jill

Senior Frontend Engineer

Jack and Jill

full-time

Posted on:

Location Type: Hybrid

Location: London • 🇬🇧 United Kingdom

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Job Level

Senior

Tech Stack

JavaScriptNext.jsReact

About the role

  • Architect and scale the frontend for an app launching 450,000+ ads/month.
  • Implement robust state management to handle complex, async, and data-heavy workflows.
  • Build production-grade testing frameworks to support safe continuous deployment.

Requirements

  • 5+ years building production React/Next.js apps, with explicit Zustand expertise.
  • Skilled at state management in large, complex, data-heavy applications.
  • Believes testing is paramount and thrives in a fast-paced startup culture.
Benefits
  • Competitive + Equity

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
ReactNext.jsZustandstate managementtesting frameworksproduction deploymentasync workflowsdata-heavy applications
Soft skills
fast-paced environmentadaptabilityproblem-solving
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