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Senior Frontend Engineer at MILE. About MILE. MILE is the new members-only shopping destination redefining luxury commerce. We offer access to a curated, seasonless catalogue of the most sought-after products from globally renowned fashion houses—all at unmatched prices. Built at the intersection of technology and fashion, MILE delivers a seamless, elevated experience for both consumers and brands. Our mission is to become the leading digital destination for luxury—where exclusivity, value, and exceptional design converge.. What We’re Looking For. We’re looking for a Senior Front-End Engineer to join our growing engineering team. As a senior member, you’ll play a pivotal role in shaping our customer-facing experiences across both our mobile app (React Native) and web platforms (React), including dashboards and our marketplace UI. This is a high-impact role for someone who thrives in fast-paced, product-driven environments and wants to help build an industry-defining brand.. What You’ll Do. . Collaborate closely with our front-end, product, design, and backend teams to deliver high-quality features across mobile and web.. . Help shape our front-end architecture and best practices to ensure scalability, maintainability, and a premium user experience.. . Implement pixel-perfect designs with attention to interaction, motion, and accessibility.. . Drive the optimisation of app and web performance, reliability, and cross-device compatibility.. . Guide UI/UX decisions with a keen eye for detail, contributing to MILE’s elevated and luxury feel.. . Contribute to and evolve our Tamagui-powered design system across platforms.. . Mentor junior engineers and contribute to a culture of technical excellence and innovation.. . Stay current with front-end trends and technologies to ensure we’re always pushing the boundaries of what’s possible.. . Who You Are. . 5+ years of professional experience developing complex front-end applications in production.. . Deep expertise in React and React Native, with a solid understanding of their ecosystems and performance distinctions in React paradigms.. . Strong grasp of modern JavaScript/TypeScript, state management (e.g., Redux, Zustand), and component-driven architecture.. . Developed multiple React Native applications that are performant and feel incredibly native, along with best practices for image loading, react-query implementation, scrollview optimizations, bottomsheet/modal management etc.. . Deep familiarity with react quirks, performance issues, useEffect gotchas and ability to make custom hooks.. . Experience making custom React Native bridge modules.. . Experience delivering polished mobile apps and web experiences that meet high standards of design and usability.. . Experience with Tamagui, Ant Design, Tailwind and Shadcn.. . Experience working with GraphQL on the frontend and building complex, templatable CMS/CRUD frontends.. . Familiarity with RESTful APIs and integrating with backend services using Orval generated methods.. . Have set up Expo, build, and QOL aspects for engineering teams.. . Experience developing native and 3rd party shopping integrations such as Stripe and Shopify - managing shop/cart/checkout state perfectly between different services.. . Skilled in performance optimisation, debugging, and profiling tools for both web and mobile.. . Comfortable working in dynamic, high-growth, early-stage environments with evolving priorities.. . A collaborative problem-solver with excellent communication skills and a product-focused mindset.. . Built or contributed to automated front-end test suites, collaborating with QA teams (e.g., Detox, Playwright, React Testing Library).. . Bonus Points. . Experience with animations and advanced UI interactions (e.g., React Native Reanimated, Framer Motion).. . Familiarity with mobile app store release processes and OTA updates (e.g., CodePush, Expo).. . Passion for fashion, luxury, or e-commerce.. . Familiarity with analytics, A/B testing, and measuring UI impact on engagement metrics.. . Company Location: United Kingdom.