Senior Fullstack Engineer (AdTech)

TL;DR

Senior Fullstack Engineer (AdTech): Building and optimizing high-performance, scalable AdTech solutions for a retail media ecosystem with an accent on Node.js microservices and React-based interfaces. Focus on designing robust end-to-end systems, integrating real-time data, and implementing AI-driven features to deliver measurable business impact.

Location: Must be based in Germany (Hybrid/Remote flexibility with required team anchor days in Cologne).

Salary: €75,000–€102,000

Company

Europe’s leading e-pharmacy dedicated to improving health through innovation and collaborative, purpose-driven work.

What you will do

• Develop and optimize Node.js/TypeScript microservices with a focus on scalability and modularity.
• Build and maintain React applications using Next.js and Material-UI.
• Integrate high-throughput data systems using MongoDB, Redis, and Algolia.
• Manage reliable distributed message queuing using BullMQ and RabbitMQ.
• Collaborate with Product, Design, and Analytics teams to deliver end-to-end Retail Media features.
• Implement and ship AI-integrated features into production systems.

Requirements

• Must be based in Germany for this role.
• Strong hands-on experience with JavaScript/TypeScript, Node.js, and React.
• Deep experience building scalable microservices in cloud-native environments.
• Proven ability to write clean, maintainable, and efficient code.
• Experience integrating AI into real-world systems and shipping features.
• Comfortable working in Agile/Scrum environments.

Nice to have

• Familiarity with AdTech or Retail Media platforms such as Kevel, Google Ad Manager, CitrusAd, or TopSort.

Culture & Benefits

• Flexible work-from-home policy with the option to work from anywhere in the EU for up to 20 days per year.
• Regular team and area anchor days in the Cologne office.
• Urban Sports Club membership (M package).
• Anonymous mental health support via Likeminded.
• Fully costed Deutschland Ticket for mobility.
• Continuous learning support through internal and external training.