Senior Frontend Engineer - Checkout (all genders)
About You SE & Co. KG1 day ago
Hamburg, GermanySenior
Responsibilities
- Architect and build modular checkout UI components for authentication, addresses, payment selection, order placement, and order confirmation.
- Develop payment-provider integrations including Klarna, PayPal, and Apple Pay with widget and redirect flows.
- Own storefront integration contracts for multi-tenant setups, including embeddable web components, host events, and tracking.
- Optimize Core Web Vitals, loading speeds, rendering performance, and conversion-focused user experience.
- Ensure WCAG accessibility, responsive design, semantic markup, and cross-browser compatibility.
- Monitor and resolve production issues across tenant shops using observability tools such as Datadog.
- Translate complex checkout requirements into scalable solutions and expand platform capabilities for client customization.
- Collaborate with Product, UX, Backend, and QA teams in daily agile workflows.
- Drive engineering standards through code reviews, architectural discussions, and technical refactoring.
- Write automated tests and work within modern CI/CD pipelines.
Requirements
- At least 5 years of frontend engineering experience with senior-level ownership, including enterprise experience or leadership of complex frontend setups.
- Advanced JavaScript and TypeScript skills, including modern JavaScript ES6+ and strict-mode TypeScript.
- Strong experience building complex UIs with React 19, Redux Toolkit, and redux-saga.
- Experience optimizing web performance and Core Web Vitals.
- Experience with semantic HTML5 and scalable CSS architectures using SCSS, BEM, and modern design systems.
- Experience building forms-heavy, internationalized UIs with tools such as Formik and react-intl in multi-tenant REST API environments.
- Experience writing automated tests with Jest and React Testing Library.
- Ability to balance technical quality with business priorities and make pragmatic trade-offs.
- Fluent English communication skills and the ability to collaborate transparently across disciplines.
- Experience with embeddable widgets, web components, or frontends running inside third-party sites is preferred.
- Enterprise-level business experience and comfort communicating with C-level stakeholders are preferred.
- Flutter skills are a plus.
Benefits
- The company emphasizes an inclusive, accepting, and fair workplace where different backgrounds and perspectives are valued.
- The role includes access to company benefits, which may vary by location.
- The position is based in an international, collaborative environment focused on flexibility, creativity, continuous development, and eCommerce innovation.
Tech Stack
Categories
About About You SE & Co. KG
ABOUT YOU SE & Co. KG operates an online fashion marketplace for European consumers and licenses commerce technology to brands via its SCAYLE platform. The group sells apparel and lifestyle products through its mobile app and aboutyou.com, and offers a cloud-based enterprise shop system under a license model to retailers. Founded in 2014 and headquartered in Hamburg, it is a publicly listed company.