Senior Engineer, 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 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.

About the company

As Europe’s No.1 e-pharmacy the company 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 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.