Senior TypeScript/Node.js Developer (Swedish Ad Platform)

Job description

Company Description Are you passionate about building high-performance platforms that serve millions of users worldwide? We are looking for a Senior TypeScript/Node.js Developer to join our team and help transform a global AdTech product into a scalable, platform-first architecture. At Sigma Software, we value engineering excellence, innovation, and collaboration, offering the opportunity to work on cutting-edge projects with world-class customers. You will have the chance to work with advanced AWS serverless solutions, contribute to strategic architectural decisions, and enjoy a supportive environment with professional growth opportunities. CUSTOMER: Our Customer is a Sweden-based AdTech company specializing in advanced self-serve advertising platforms that automate direct transactions between advertisers and major global publishers. Their technology removes traditional friction in ad sales by enabling automation, transparency, and operational efficiency at scale. Platforms are trusted by internationally recognized publishers including TripAdvisor, Bloomberg, The Washington Post, Opera, and Dow Jones, handling millions of transactions worldwide. PROJECT: The project is a strategic...