Front-End Developer

Crimson; City Of London; Hybrid; GBP 55,000 - 65,000; Full time

Job summary

A leading tech company in London is seeking a Frontend Developer to enhance their e-commerce user interface. This hybrid role requires expertise in modern JavaScript frameworks and a focus on client-side security. Join a dynamic team to create responsive user experiences while utilizing cutting-edge technology and methodologies. Interested candidates should submit their CV for immediate consideration.

Qualifications

• Ability to develop and maintain high-quality, responsive user interfaces for web and mobile.
• Experience with building and deploying cross-platform mobile applications.
• Knowledge of implementing secure authentication flows.

Responsibilities

• Develop and maintain user interfaces for web and mobile.
• Create reusable components to ensure accessibility and scalability.
• Integrate e-commerce tools and APIs for personalized content.

Skills

Proficiency in modern JavaScript frameworks

Client-side security

Mobile deployment techniques

HTML5

JavaScript (ES6+)

Advanced CSS

CSS Grid

Flexbox

SASS / LESS

React Native

Flutter

Redux

Context API

Automated testing

Job description

Frontend Developer - Hybrid

The salary on offer for this role is £55,000 - £65,000 per annum

Hybrid - Enfield, London - 3 days per week

We're seeking a Frontend Developer to join our client's team to build and maintain the development and upkeep of our e-commerce user interface. This role is key to delivering a unified, high-performance customer experience across all channels. Proficiency in modern JavaScript frameworks, client-side security, and mobile deployment techniques is required.

Responsibilities & Skills

• Develop and maintain high-quality, responsive user interfaces for web and mobile using HTML5, JavaScript (ES6+), and advanced CSS.
• Create reusable components and design systems to ensure consistency, accessibility, and scalability across all digital channels.
• Apply modern styling techniques (CSS Grid, Flexbox, SASS / LESS) and optimise performance for Core Web Vitals.
• Build and deploy cross-platform mobile applications (iOS & Android) using frameworks such as React Native or Flutter.
• Implement secure authentication flows, protect against common vulnerabilities (XSS, CSRF), and adhere to OWASP best practices.
• Integrate e-commerce tools and APIs (e.g., Klaviyo, Yotpo) for personalised content and loyalty features.
• Manage complex application state using libraries like Redux or Context.
• Ensure robust testing through unit, integration, and end-to-end automation.

Interested? Please submit your updated CV to Emma Siwicki at Crimson for immediate consideration. Not interested? Do you know someone who might be a perfect fit for this role? Refer a friend and earn £250 worth of vouchers!

Crimson is acting as an employment agency regarding this vacancy