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 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.