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Technologies-expected : Java Spring Boot Spring Docker Kubernetes AWS Hibernate SQL JUnit Mockito microservices technologies-optional : Spring Security No SQL Terraform Prometheus Datadog Kafka Rabbit MQ Graph QL about-project : Do you want to play a key role in revolutionizing the future of finance? Join a global leader in deferred payments, with over 85 million active users and 2.5 million transactions processed daily! As a pioneer in modern payment solutions, our client is developing innovative methods that streamline the shopping experience, enhance transaction security, and expand the availability of purchasing options. Were seeking individuals eager to achieve remarkable results and share their bold vision to redefine the future of payments and fintech. Send us your CV - we can’t wait to meet you! Our client: Klarna Location: Warsaw (hybrid work, at least 3 days a week from office) Rate: 165 - 195 PLN per hour Cooperation model: B2 B or Employment Contract Start date: ASAP Duration: long-term agreement Recruitment process: 1 timed Abstract and Logical Reasoning Test (up to 15 minutes); 1 short interview (up to 30 minutes) Technology stack: Java (latest versions), Spring, Spring Boot, Docker, Kubernetes, Kafka, Postgre SQL, Dynamo DB, Elasticsearch, Microservices architecture on AWS responsibilities : To work within a key problem space, addressing the clients immediate needs by designing, developing, and deploying backend services that prioritize scalability, high availability, and low latency; To collaborate and grow in a dynamic and autonomous environment while working in small, agile and cross functional teams; To use the latest technologies to solve real problems for customers at a massive scale; To be part of a team that will take full operational responsibility for the services that you own, and potentially take part in an on-call rotation; To share your knowledge and build creative solutions while helping the team evolve best practices. requirements-expected : At least 5 years of experience with Java (version 17 and up); Framework knowledge: Spring Framework (Spring Boot, Spring MVC), Hibernate or JPA; Tools: Docker and CI/CD tools (e.g., Jenkins, Git Lab); Databases: Strong SQL skills with hands-on experience in relational databases; Testing: Proficiency in unit testing (JUnit, Mockito) and integration testing tools; Cloud & Dev Ops: AWS cloud infrastructure and microservices architecture; System Design: Solid experience with microservices architecture, scalability, and system integration; Strong educational background in Computer Science, Information Technology, or a related field; Language proficiency: Advanced English (minimum B2 level). offered : Great opportunity for personal development in a stable and friendly large multinational company; Start-up mentality, small agile teams; Global Reach: Impact millions with seamless shopping and payments; Career growth and additional education.