Senior Back-End Developer (Swedish Ad Platform)

We’re seeking a Senior Back-end Developer who will be a primary builder of this platform. You will implement the robust, scalable, and secure microservices that form the core of our multi-tenant architecture. You will adhere to the OpenAPI contract, ensuring every service you build, from real-time billing and reporting to the campaign approval flow, is reliable, high-performing, and perfectly aligned with the detailed business logic. Immerse yourself in a high-load AdTech environment, collaborating on real-time integrations with ad servers, CRMs, and payment providers. This role involves modernizing the existing architecture, refactoring legacy monolithic components into cloud-native microservices running on AWS, and designing the secure API infrastructure necessary for future integrations, including advanced machine learning and AI models. Your technical expertise will directly empower thousands of global advertisers. Customer Our Customer is a Swedish AdTech company that transforms the way publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world’s largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together, we serve globally recognized clients, including TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc. Project We are building a white-label, self-serve advertising platform that is widely used by international media companies and publishers. The platform integrates with ad servers, CRMs, and payment systems, providing a unified interface for managing advertising campaigns. This system handles high volumes of real-time data and transactions, requiring exceptional performance and stability.