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# Senior Engineer, FullStack, Retail Media/AdTech Solutions

- **Company:** Redcare Pharmacy
- **Location:** Köln, Germany (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, JavaScript (Programming Language), Artificial Intelligence, Data Analysis, Cloud Computing, Data Systems, Enterprise Messaging Systems, MongoDB, Node.Js, Octopus Deploy, Scrum Methodology, Queueing Systems, RabbitMQ, Redis, Next.js, Systems Architecture, Systems Integration, TypeScript, Circleci, Network Routers, Google Cloud, ReactJS, Backend, Kubernetes, Web Technologies, Front End Software Development, NestJS, Docker, Microservices
- **Published:** September 30, 2026
- **Apply:** https://www.careerjet.de/jobad/dee206925ff49ed89a387d94b440d926ec

## About the Role

* 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.

## Description

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., 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.