Contract Senior Front End Engineer

Noble Panacea, Inc.; City of London; On-site; GBP 50,000 - 70,000; Part time

Job summary

A leading skincare brand is seeking a Mid-Senior Front-End Engineer to lead the migration and development of a high-performance front-end layer. The candidate should have 6-10 years of experience with React, TypeScript, performance optimisation, and a background in headless e-commerce architecture. This contract role offers a chance to work closely with cross-functional teams to enhance user experience and site performance.

Qualifications

• 6-10 years of strong front-end engineering experience.
• Proven experience in headless e-commerce architecture.
• Record of improving web performance metrics.

Responsibilities

• Lead front-end migration and builds from Stencil to Catalyst.
• Implement a high-performance front-end layer.
• Collaborate with cross-functional teams to integrate backend.

Skills

React

TypeScript

CSS/Sass

Responsive design

Performance optimisation

Collaboration

Problem-solving

CI/CD pipelines

Job description

Noble Panacea is a new revolutionary skincare brand founded by Nobel Laureate Sir Fraser Stoddart and launched in October 2019. The ground-breaking OSMV™ Technology at the core of the brand enables transformational efficacy and precision. We create deep respect & intention by adhering to the global principles of green chemistry. We take our commitment to nature and sustainability to all stages of product development, from R&D to packaging. Ultimately, we strive to promote absolute skin health by empowering all who seek authentic, natural, and ageless beauty.

Duties and Responsibilities

• Lead front‑end build/migration of pages and components from Stencil to Catalyst (or headless alternative) using the architecture defined by our SI vendor.
• Implement a high‑performance front‑end layer: ensure site speed, Lighthouse metrics, and core web vitals improvements.
• Collaborate with internal and external cross‑functional teams (Product, Design, Engineering, QA) to ensure smooth integration with backend, APIs, and Makeswift configuration.
• Build reusable component libraries, UI patterns, and page templates aligned to our design system and brand.
• Ensure development best practices: code quality, reviews, performance optimisation, and accessibility.
• Work in an Agile/Scrum environment; deliver sprints of new pages/features, monitor and fix performance regression.
• Provide mentoring and knowledge transfer to new internal full‑stack engineers to ramp them up on the Catalyst/Makeswift environment.
• Coordinate with QA automation to ensure test coverage for front‑end and cross‑browser/device performance.
• Help define monitoring and instrumentation for front‑end performance (e.g., real‑user metrics, analytics hooks) and support integration with backend performance analytics.

Requirements

• Strong front‑end engineering background (≥ 6‑10 years) in React, TypeScript, modern CSS/Sass, responsive design and performance optimisation.
• Proven experience in a headless e‑commerce or large CMS/makeswift‑type architecture, ideally with migration from monolithic or older front‑end frameworks.
• Experience with the BigCommerce Catalyst architecture (or headless BigCommerce) or similar (e.g., Contentful, Shopify Hydrogen, Next.js) is a significant plus.
• Demonstrated record of improving web performance (Core Web Vitals, Lighthouse scores, page‑load, TTI, etc).
• Comfortable collaborating in multi‑vendor and large team environments; can pick up existing codebase quickly and lead build with limited ramp‑up.
• Excellent problem‑solving, clear communication, and ability to mentor others.
• Familiarity with CI/CD pipelines, front‑end performance tooling (WebPageTest, Lighthouse CI, etc), browser profiling, bundler optimisation.
• Bonus: experience working in an e‑commerce (luxury/retail) environment, understanding of the BigCommerce ecosystem and Stencil limitations.

Desirable Attributes

• Self‑starter, comfortable with ambiguity (legacy Stencil context, integration issues).
• Pragmatic trade‑off mindset (speed vs. perfection) given urgency.
• Able to document and articulate decisions, support hand‑over to internal team.
• Experience in international/EMEA deployments helpful as you will be working globally.

Seniority level

Mid‑Senior level

Employment type

Contract

Job function

IT Services and IT Consulting