Driving the architectural vision for frontend systems, the full-time Principal Frontend Engineer will define key milestones and technical requirements while collaborating with cross-functional teams to build scalable and user-friendly web applications, with the option to work remotely or from Cologne. Key Responsibilities Own the overall architecture of frontend systems and define key architectural milestones and critical technical requirements Drive improvements in scalability, performance, and cross-team code reuse across frontend solutions Mentor engineers and support their growth in architectural thinking and technical decision-making Required Qualifications Strong proficiency in modern frontend development, including Next.js, TypeScript, React, and accessible, semantic HTML Experience leading complex frontend initiatives as a principal, technical lead, project lead, or senior engineer Proven ability to translate business requirements into scalable technical solutions Strong knowledge of API design and service communication, including REST and GraphQL Hands-on experience with CSS, including pure CSS, preprocessors, and CSS-in-JS