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Senior Fullstack Engineer, AdTech (Remote - Germany) at Jobgether. This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Fullstack Engineer, AdTech in Germany.. This role offers the opportunity to design and develop high-performance, scalable AdTech solutions within a dynamic Retail Media ecosystem. You will work across the full stack, from backend microservices to frontend interfaces, ensuring clean architecture, robust performance, and seamless user experiences. Collaborating closely with cross-functional teams, you will help transform complex business requirements into innovative technical solutions. The environment is fast-paced and growth-oriented, emphasizing agility, quality, and continuous improvement. Your contributions will have direct impact on ad delivery, analytics, and user engagement, supporting measurable business outcomes. You will also play a key role in shaping engineering best practices and scaling technology to meet evolving market needs.. . Accountabilities. . Design, develop, and optimize backend microservices using Node.js and TypeScript, focusing on modularity, performance, and scalability.. . Build and maintain React-based frontend applications with Next.js and Material-UI, implementing advanced form logic and responsive, accessible UI.. . Integrate and optimize high-throughput data systems using MongoDB, Redis, and Algolia for real-time ad delivery and analytics.. . Implement reliable distributed messaging and background processing with BullMQ and RabbitMQ.. . Collaborate closely with Product, Design, and Analytics teams to deliver end-to-end Retail Media features.. . Participate in sprint planning, technical reviews, and solution discovery, ensuring alignment with business and technical objectives.. . Contribute to architectural decisions, improving system maintainability, reliability, and long-term scalability.. . . Strong hands-on experience with JavaScript/TypeScript, Node.js, React, and modern frontend frameworks.. . Proven experience building scalable microservices and frontend applications in cloud-native environments.. . Familiarity with AdTech or Retail Media platforms (e.g., Kevel, Google Ad Manager, CitrusAd, TopSort) is an advantage.. . Committed to writing clean, maintainable, and efficient code, with emphasis on testing, scalability, and system health.. . Comfortable working in Agile/Scrum teams and contributing proactively to cross-functional initiatives.. . Strong problem-solving skills and ability to thrive in fast-paced, dynamic environments.. . Continuous learner, staying up to date with technology trends and industry best practices.. . Company Location: Germany.