Senior Backend & Data Engineer – JavaScript/TypeScript

Senior Backend & Data Engineer Location: Hybrid – Warsaw (2 days remote / 3 days office) About […] […] is an award-winning IT company founded in Sweden, with a strong presence across Norway, Denmark, Germany, Finland, and Poland. We combine Scandinavian work culture with technical excellence, delivering modern, scalable digital solutions for international clients. At […], we believe in collaboration, ownership, and continuous growth.

We build strong teams that create meaningful products — and we make sure our people grow along the way. About the Role We are looking for an experienced Senior Backend & Data Engineer to join Technology Innovation Hub in Warsaw. This is a hybrid position combining backend software engineering with data engineering, with a particular focus on complex database solutions, data architecture, and Master Data Management (MDM).

You will work hands-on with JavaScript and TypeScript, complex relational databases, and data-driven backend solutions, while taking technical ownership of a dedicated data domain.

Design, develop, and maintain scalable backend services and data-driven applications using JavaScript and TypeScript. Design and implement complex relational database structures, primarily using PostgreSQL or similar technologies. Take end-to-end technical ownership of a dedicated data domain, ensuring the reliability, consistency, and maintainability of its solutions.

Develop and optimize data models, database schemas, queri