Frontend Developer at Sanderson, West Yorkshire, £450–£550 per day

Senior Frontend Engineer (Contract) – Retail Digital Platform

Location: West Yorkshire - 2 days per week

Duration: Initial 6-Month Contract

Rate: £450–£550 per day (Outside IR35)

The Opportunit

yWe're supporting a major UK retail organisation undergoing significant digital transformation across its e-commerce and customer experience platforms. They are looking for an experienced Senior Frontend Engineer to help deliver scalable, high-performance web applications and Progressive Web Apps (PWA) used by millions of customers

.You'll work within agile product teams alongside Product Managers, UX Designers, Architects, Backend Engineers and QA specialists to build and enhance customer-facing digital experiences

.
Key Responsibiliti

• esDesign, develop and maintain modern frontend applications using React and TypeScri
• ptDeliver scalable, maintainable and high-performing web solutio
• nsCollaborate with product and UX teams to translate business requirements into technical solutio
• nsDrive frontend engineering best practices across performance, accessibility and securi
• tyLead code reviews and contribute to technical decision-maki
• ngImplement automated testing and CI/CD practic
• esOptimise customer journeys across search, browse, basket and checkout experienc
• esSupport continuous improvement initiatives within agile delivery tea

ms
Required Skills & Experie

• nceStrong commercial experience with Re
• actExpert knowledge of TypeScript and modern JavaScript (ES
• 6+)Experience building and maintaining Progressive Web Apps (PW
• As)Strong understanding of HTML5, CSS3 and S
• CSSResponsive and mobile-first development experie
• nceREST API and/or GraphQL integration experie
• nceTesting experience using tools such as Jest, React Testing Library, Cypress or Playwri
• ghtExperience working with Git-based version control and CI/CD pipeli
• nesStrong knowledge of frontend performance optimisation and Core Web Vit
• alsExperience delivering accessible applications aligned to WCAG standa

rds
Desirable Experi

• enceLarge-scale e-commerce or retail platf
• ormsHigh-traffic customer-facing webs
• itesAzure cloud environm
• entsPersonalisation, experimentation or A/B testing platf
• ormsSearch, browse, basket or checkout functiona

lity
What We're Lookin

• g ForStrong problem-solving capab
• ilityExcellent stakeholder and team collaboration s
• killsAbility to provide technical leadership within delivery
• teamsPassion for engineering excellence and continuous improv
• ementProven track record delivering high-quality solutions in fast-paced agile environ