Senior Frontend Engineer – Sell Online
SumUp
Standort: Cologne, Germany, Germany
**Senior Frontend Engineer – Sell Online at SumUp in Cologne, Germany** **What you'll do** - Build and maintain frontend features across payment links, gift cards, and online checkout products - Contribute to the development of integration products and SDKs - Participate in technical planning, design reviews, and sprint ceremonies - Help reduce tech debt and improve application performance - Monitor live services and respond to issues **What they're looking for** - 5+ years of experience in TypeScript and JavaScript - Experience building production-grade React and Next.js applications - Experience writing unit, integration, and end-to-end tests - Comfortable working within CI/CD workflows and agile environments - Experience with UI libraries and accessibility best practices - Product mindset with ability to work autonomously **Details** - Location: Cologne, Germany - Type: Not specified - Salary: Not specified
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