Frontend Developer HTML5 CSS Javascript

Company: Quant Capital
Apply for the Frontend Developer HTML5 CSS Javascript
Location: London
Job Description:

Overview

In this role you will lead the front-end for a fintech startup transitioning from a proof-of-concept SPA to a scalable product. You’ll establish a robust UI framework, collaborate with back- and middle-tier teams, and shape the UX across multiple platforms. Your work will drive data-driven, user-centric interfaces and support rapid growth in a dynamic, young team. This is an opportunity to influence product architecture and deliver a scalable, high-quality Web-UI.

Pay / Benefits

  • emI options scheme
  • home working and flex work encouraged

Responsibilities

  • Lay the foundation for UX/UI development processes
  • Establish a robust, flexible UI development framework across products
  • Generate value-added ideas and identify key features
  • Improve the customer experience and overall satisfaction
  • Enhance UX/UI design and implement best practices for change management and scalability
  • Migrate UI assets to rely on the new framework
  • Collaborate with back-end and middle-tier developers
  • Contribute to architecting, developing, testing, and deploying the Web-UI in production

Key requirements

  • Expert knowledge of HTML5/CSS
  • Good command of JavaScript
  • Extensive experience with Bootstrap and Material Design
  • Significant experience with React or Angular
  • Familiarity with UX design tools (Figma)
  • Experience gathering and prototyping user stories/requirements
  • Ideally exposure to Blazor stack
  • Ideally Xamarin Forms experience
  • Ideally hands-on native mobile development (Android/iOS)
  • Ideally familiarity with older XAML-based frameworks
  • Valuable experience with C#, T-SQL or DevOps
  • excellent communication skills
  • strong collaboration with cross-functional teams
  • proactive problem solving
  • HTML5
  • CSS
  • JavaScript

Posted: September 14th, 2026