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Quantum

Senior Frontend Engineer – Web, App

Quantum

Senior Frontend Engineer for Cashback and Custard apps at Quantum. Focusing on revenue-enhancing functionality, UX improvements, and test automation.

Posted 8/2/2026full-timeMaidstone • 🇬🇧 United KingdomSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in Frontend Development with a focus on React and TypeScript, while also possessing the ability to build and ship mobile applications using React Native. Strong emphasis on UX design and end-to-end test automation in a collaborative, fast-paced environment.

Highest-signal resume keywords
React DevelopmentTypeScript ProficiencyReact Native Application DevelopmentEnd-to-End Test AutomationUX Design

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Frontend DevelopmentMobile App DevelopmentAutomated TestingProduction-Grade CodeFull Stack Development
Soft Skills
Team CollaborationFast-Paced AdaptabilityExcellent Communication
Tools & Technologies
ReactTypeScriptReact NativePython
Industry Keywords
Web UXApp FunctionalityRevenue GenerationRetention Strategies

Tech Stack

Tools & technologies
AndroidiOSPythonReactReact NativeTypeScript

About the role

Key responsibilities & impact
  • Own the frontend across the Cashback and Custard apps and websites, from build through to release
  • Ship new app functionality that moves revenue and retention, working closely with product and backend
  • Build and maintain automated end-to-end tests so staging is stable and releases are predictable
  • Raise the standard of web and app UX across both reward brands
  • Work full stack where it counts, partnering with our backend developers on the Python services behind the apps

Requirements

What you’ll need
  • A strong senior frontend engineer, production-grade with React and TypeScript on the web
  • Hands-on building and shipping mobile apps, ideally React Native across iOS and Android
  • A sharp eye for UX and design: you care how a product feels, not just whether it works
  • Comfortable owning end-to-end and staging test automation as part of how you ship
  • Happy working across the stack, with Python a strong plus rather than a hard requirement
  • You thrive when working as part of a team
  • Comfortable in a fast-paced environment
  • Have excellent written and verbal English skills
  • Last but not least, you’ll have no ego!

Benefits

Comp & perks
  • Private Health Care (Bupa)
  • Hybrid Working (3 days in office)
  • Travel Insurance
  • Competitive Base Salary
  • Company Bonus Scheme
  • Paid for AI Subscription (Claude / ChatGPT / Gemini)
  • Market-Leading Training Programme
  • Recognition & Reward Scheme
  • Annual Company Conference
  • Regular Happy Hours & Team Lunches
  • Free Coffee, Drinks & Snacks