Staff Frontend Engineer (m/f/d) - App & Web - onsite in Hamburg or Berlin at ABOUTYOUGmbH

We are currently looking for a Staff Frontend Engineer (m/f/d) with a passion to assume leadership responsibilities 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.   What you will do   • Guide the team through complex technical challenges, breaking down large projects into manageable tasks and ensuring timely and quality delivery of new e-commerce features. • Mentor and coach Frontend Developers, QA Engineers, helping them grow their technical skills, understand system architecture, and advance their careers. • Act as the key technical partner to the Teamlead Product to align engineering effort with business goals, product vision, and user experience requirements to share a joint vision between product and tech. • Act as the primary technical contact person for the team. Ensure clear and continuous alignment with Tech Leads from other teams regarding shared backend architecture, API schemas, and integration contracts. • Define and communicate the technical roadmap and architecture for the ABOUT YOU website application, ensuring scalability, performance, and security, especially during peak e-commerce traffic. • Ensure the team's technical strategy and delivery methods are aligned with the overall vision set by the App & Web Tech Lead. • Own the monitoring and optimization of the website's Core Web Vitals and overall application performance, collaborating with operations to ensure high availability and fast load times. • Take technical ownership of the website application, ensuring its short- and long-term maintainability, technology stack health, and adherence to company-wide standards. • Actively participate in the hiring, interviewing, and onboarding of new engineering talent, helping to grow the team effectively. • Research, evaluate, and propose new technologies and tools that can improve the customer experience or development efficiency of the ABOUT YOU website. • Proactively identify and prioritize technical debt with the Product Lead, ensuring a balance between feature development and platform longevity.  Who you are   • 6+ years of programming experience in UI or Web development. • First experience of leading (discipline or professional) is good to have. • Exceptional problem-solving and algorithmic thinking skills, coupled with a deep understanding of software design patterns and clean code principles. • Expert-level knowledge and practical experience in building modern, scalable web applications using React, TypeScript, and advanced CSS/Styling techniques. • Proven experience in analyzing and optimizing website performance, including deep knowledge of browser rendering, bundling, and techniques to achieve best-in-class Core Web Vitals and a fast user experience using tools like DataDog or similar platforms. • Good understanding of API design principles (e.g., REST, GraphQL, etc.) and experience in architecting robust and efficient data flow between the frontend application and backend services. • Good working knowledge of Node.js for modern frontend toolchains, build processes, and potential Backend-for-Frontend (BFF) services. • Demonstrated ability to define and implement a robust testing strategy across Unit, Integration, and End-to-End (E2E) testing. • Hands-on experience implementing and maintaining CI pipelines to ensure continuous code quality and stable releases. • You act as a mentor who inspires and guides engineers to prioritize continuous growth and learning while maintaining high team productivity. • You demonstrate proactive self-drive and take full accountability for the team's commitments, technical outcomes, and continuous improvement.  Nice to have • Experience managing or deeply understanding the nuances of hosting your own application infrastructure (e.g., Cloud providers, containerization). • ​​​​​​​Basic understanding of database concepts and how they interact with the application layer. • Direct experience working on high-traffic e-commerce platforms, understanding the unique challenges of inventory, checkout, and personalization at scale. • Hands-on experience in automating development/QA workflows using AI tools is a strong bonus.  Benefits • Hybrid working • Company Pension Plan • Fresh fruit every day • Sports courses • Exclusive employee discounts • Free drinks • Language courses • Company parties • Help in the relocation process • Mobility subsidy • State-of-the-art technology • Central Location • Flexible Working Hours • Dog-friendly office • AY Academy • Feedback Culture • Job Bikes*Please find free fruits, drinks and coffee in our lovely Hamburg Office / HQ   YOU ARE THE CORE OF ABOUT YOU.  We take responsibility for creating an inclusive and exceptional environment where all genders, nationalities and ethnicities feel welcomed and accepted exactly as they are. We believe that a diverse workforce essentially contributes to the ABOUT YOU culture. In order to maintain talent and diversity, we emphasize the care for physical health, mental health and overall well-being. Our values and work ethics essentially contribute to our brand mission: empower acceptance and shape an inclusive, fair and circular fashion culture. We are looking forward to receiving your application – preferably via our online application portal! Thus, we can ensure a faster process and for you it is very easy to upload your application documents. :-)