Senior Frontend Engineer - Checkout (all genders)
About You SE & Co. KG1 day ago
Hamburg, GermanySenior
Responsibilities
- Architect and build modular checkout, authentication, and express-checkout web components using TypeScript and React.
- Develop integrations with payment providers including Klarna, PayPal, and Apple Pay, covering widget and redirect flows.
- Own storefront integration contracts for multi-tenant setups, including embeddable components, host events, and tracking.
- Optimize loading speed, rendering performance, Core Web Vitals, and conversion-focused user experience.
- Monitor and resolve production issues across tenant shops using observability tools such as Datadog.
- Translate checkout requirements into scalable, accessible, responsive, and cross-browser-compatible solutions.
- Drive engineering standards through code reviews, architectural discussions, technical refactoring, and automated testing.
- Expand SCAYLE checkout platform capabilities to support client customization through injectable content.
- Collaborate with Product, UX, Backend, and QA teams to deliver one-page and multi-step checkout flows.
Requirements
- 5+ years of frontend engineering experience with senior-level ownership, including enterprise experience or leadership of complex frontend setups.
- Advanced JavaScript ES6+ and TypeScript skills, including strict-mode TypeScript.
- Experience with Flutter, React 19, Redux Toolkit, and redux-saga.
- Experience building complex UIs with asynchronous flows, multi-step funnels, and payment redirects.
- Experience optimizing web performance and Core Web Vitals.
- Experience with semantic HTML5, scalable SCSS and BEM-based CSS architectures, and modern design systems.
- Experience building forms-heavy, internationalized UIs with tools such as Formik and react-intl in multi-tenant environments.
- Experience writing automated tests with Jest and React Testing Library and working within modern CI/CD pipelines.
- Fluent English communication, pragmatic technical decision-making, ownership, and cross-disciplinary collaboration.
- Experience building embeddable widgets or web components for third-party sites is preferred.
- Enterprise-level experience and comfort communicating with C-level stakeholders are preferred.
Benefits
- Benefits are provided through SCAYLE’s benefits program and may vary by location.
- The company emphasizes an inclusive, accepting, and fair working environment.
- The workplace supports flexibility, creativity, and continuous professional development.
- Applications are submitted online through the career page.
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.