Join our team in Warsaw, where we’re collaborating on a cutting-edge fintech venture with a global industry leader. Together with our Partner – Klarna, we’re building an IT hub designed to drive innovation in digital payment solutions. We’re on the lookout for top-tier engineers who thrive in dynamic, forward-thinking environments. Spyrosoft is leading the recruitment process, facilitating a seamless experience for candidates who are ready to shape the future of online shopping and payments.Your responsibilities

Working on problem spaces critical to Klarna’s business, with flexibility to change teams as needed

Designing, developing, and maintaining backend services using Java and Spring Boot

Building scalable and reliable systems deployed in AWS

Participating in the full project lifecycle — from concept to deployment and maintenance

Collaborating with cross-functional teams to align on integration and architecture

Promoting engineering best practices with a focus on innovation and quality

Identifying and addressing issues in distributed and financial systems

Contributing within small, autonomous teams with fast release cycles Requirements

Minimum 8 years of experience in backend development

Proficiency in Java and Spring Boot

Experience with PostgreSQL and designing scalable, robust systems

Expertise in cloud technologies, especially AWS

Knowledge of distributed and financial systems, with a focus on proactive issue prevention

Ability to manage projects independently from end to end

Leadership experience and a track record of fostering positive engineering cultures

Strong communication and collaboration skills across teams and domains

Fluency in spoken and written English