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

**About Redcare Pharmacy:** As Europe’s No.1 e\-pharmacy Redcare Pharmacy is powered by passionate teams and cutting\-edge innovation. We strive to create a healthy collaborative work environment where every employee feels valued and inspired to contribute to our vision “Until every human has their health”. If you’re seeking a career that offers purpose and aligns with your values join us and start your \#Redcareer today. **About the role:** As a **Senior Fullstack Engineer (m/f/d)** in the **Retail Media Ad Solutions area** , you will play a critical role in designing and building high\-performance, scalable AdTech solutions that power our growing Retail Media ecosystem. You'll work across the stack, from backend services to customer\-facing interfaces, with a strong focus on clean architecture, data performance, and user\-centric development. Working closely with your cross\-functional team, you’ll help turn complex business needs into robust, end\-to\-end technical solutions that deliver measurable impact. **About the tech stack:** React, Next.js, TypeScript, Node.js, Koa.js, NestJS, MongoDB, Redis, BullMQ, RabbitMQ, Algolia, Docker, Kubernetes (GKE), Google Cloud Platform, CircleCI, ArgoCD, and integrations with modern ad\-serving platforms. *While this is a remote position based in Germany, it may require occasional on\-site collaboration at our offices in Berlin or Cologne, depending on business and team requirements.* **Job Description** **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. **Qualifications** **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. **Additional Information** **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 paid vacation per annum (plus another day on Rosenmontag) and the option to take unpaid vacation of up to 10 days (after one year working with us). * Employee discount: You get a 10 % employee discount on all over the counter, beauty and personal care products in our online store \& 20 % discount on nu3\.