(Senior) Frontend Engineer (m/w/d) - Team Webstack - onsite in Hamburg or Berlin

Stellenbeschreibung:

We are currently looking for a skilled (Senior) Frontend Engineer (m/w/d) – Team Webstack to support us in building the fastest & most intuitive shopping app using a brand-new tech stack onsite in Hamburg or Berlin !

The App & Web Team constantly improves the App, Mobile Website and Desktop Website. These big-scale products are each visited by over 11M active users every month. The team’s focus is to provide our customers the most inspiring, convenient, intuitive, and easy-to-use shopping experience. They constantly challenge themselves to raise the bar of what is “state of the art” in customer-facing products.

Core Technologies

JavaScript
React
TypeScript

What you will do

Develop and maintain high-quality, performant, and scalable frontend features for our Web Shop (Desktop, Mobile Web, Tablet) using React and TypeScript.
Collaborate closely with product managers, UX designers, and QA managers to translate concepts and requirements into user-friendly and reliable features.
Take an active role in solving complex technical problems and architecting innovative, sustainable frontend solutions.
Take ownership of large-scale projects from conception to deployment, requiring little oversight.
Foster a culture of high-quality code, continuous learning, and knowledge sharing.
Actively participate in code reviews to ensure code quality, maintainability, and adherence to best practices.
Contribute to optimizing our frontend architecture, performance (Core Web Vitals), and development workflows.

Who you are

At least 4 years of experience with Frontend Development
Expert proficiency in JavaScript and TypeScript.
Deep experience with React and its ecosystem (e.g. hooks, context).
Strong skills in HTML and modern CSS (e.g. CSS-in-JS, responsive design).
Solid understanding of frontend testing frameworks (e.g. Jest, React Testing Library).
Experience integrating with REST APIs and managing application state (e.g., Redux, Zustand, React Query).
Familiarity with build tools (e.g. Webpack, Vite) and package managers (e.g. npm, yarn).
Strong knowledge of web performance optimization principles and accessibility (a11y).
Proficient with Git and comfortable with CI/CD workflows.
Excellent problem-solving: You can solve conceptual, non-standard problems and exercise solid judgment based on analyzing multiple sources of information.
High autonomy and ownership: You are motivated, take matters into your own hands, and can lead a complex project or process with little oversight from your manager.