Senior Engineer, FullStack, Retail Media/AdTech Solutions (m/f/d)

About your tasks:  System Architecture & Engineering:  Develop and optimize  Node.js/TypeScript-based microservices , focusing on performance, modularity, and scalability. Contribute to architectural decisions that improve system maintainability and reliability. Frontend Development:  Build and maintain  React  applications using  Next.js (Pages Router)  and  Material-UI . Implement advanced form logic using  Formik  and  JSONSchema  validation. Ensure exceptional user experiences through responsive, accessible, and high-performance UI. Data & Messaging Systems:  Integrate and optimize high-throughput data systems using  MongoDB ,  Redis , and  Algolia  for real-time ad delivery and insights. Work with  BullMQ  and  RabbitMQ  to handle reliable, distributed message queuing and background processing. Cross-Functional Collaboration:  Partner with Product, Design, and Analytics teams to deliver end-to-end Retail Media features. Participate in sprint planning, technical reviews, and solution discovery to ensure engineering is aligned with business goals. About you: Strong hands-on skills in  JavaScript/TypeScript ,  Node.js ,  React , and modern web technologies. Deep experience building  scalable microservices  and  frontend applications  in cloud-native environments. Familiarity with  AdTech  or  Retail Media  platforms (eg such as Kevel, Google Ad Manager, CitrusAd, TopSort) will be looked upon favourably.  Committed to writing  clean, maintainable, and efficient code , with a strong focus on  scalability, testing, and long-term system health . Comfortable working in  Agile/Scrum  teams and contributing proactively to cross-functional initiatives. A continuous learner who thrives in fast-moving environments and enjoys solving real-world business challenges with technology. Have AI experience, have integrated it into real systems and shipped features with it. About your benefits: In order to provide you with the best possible support for your individual needs - whether it‘s living a healthy life, having enough time for your family, or developing your skills - we offer a wide range of different, site-specific benefits: Sports:  Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Work from Home:  If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility:  We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Personal development:  Grow! We support and encourage your individual development through various in- and external trainings. Vacation:  30 days…