Senior Java Engineer @ Winged IT

13 hours ago

Warsaw, Czech Republic Winged IT Full time
  • At least 6 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, GitLab);
  • Databases: Strong SQL skills with hands-on experience in relational databases;
  • Testing: Proficiency in unit testing (JUnit, Mockito) and integration testing tools;
  • Cloud & DevOps: 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;
  • Experience in driving complex projects from start to finish, guiding and mentoring teams;
  • Experience in contributing to architectural design and system-wide decision-making with proven track record of both technical and organizational impact;
  • Language proficiency: Advanced English (minimum B2 level).

Nice to have:

  • Others Java frameworks and Spring Security;
  • Kubernetes and CI/CD best practices;
  • NoSQL databases, PostgreSQL, and database performance tuning;
  • Performance testing and automation frameworks experience;
  • DevOps tools (Terraform, CDK) and monitoring tools (Prometheus, Datadog);
  • Understanding of distributed systems, event-driven architecture (Kafka, RabbitMQ);
  • Awareness of security best practices, API design (RESTful, GraphQL), and container orchestration tools.

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.

We're 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

Employer: Klarna

Location: Warsaw (hybrid work: 2-3 days in the office)

Rate: 170 - 195 PLN per hour

Cooperation model: B2B or Employment Contract

Start date: ASAP

Duration: long-term agreement

,[To work within a key problem space, addressing the client's 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: Java, Spring, Docker, AWS, Spring Security, Kubernetes, NoSQL, PostgreSQL, Terraform, Prometheus, Datadog, Kafka, RabbitMQ, GraphQL, JUnit, Mockito, Jenkins, GitLab, Hibernate, CI/CD, REST Tools: Jenkins, Agile. Additionally: Small teams, International projects, Flat structure, In-house trainings, Modern office, Mobile phone, Startup atmosphere.

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