Java Backend Engineer | contract until 31-March-2027 + potential extensionLocation: Warsaw, Poland (100% on-site)Experience Required: 3+ yearsEmployment Type: Full-timeAbout the RoleWe are looking for a Java Backend Engineer to join a global technology team building and supporting high-performance, scalable applications within a complex enterprise environment. You will work on mission-critical systems, contribute to modern cloud-native architectures, and collaborate with engineers across multiple disciplines to deliver reliable and innovative solutions.This role is ideal for someone with strong Java development experience who enjoys solving complex technical challenges and working with modern DevOps and AI-assisted development practices.Key ResponsibilitiesDesign, develop, test, and maintain scalable backend applications using Java and Spring Boot.Build and support event-driven architectures utilizing Kafka.Develop and deploy applications in Kubernetes environments.Implement and enhance CI/CD pipelines using GitLab CI/CD.Monitor and troubleshoot production systems using Prometheus, Grafana, and Elastic Stack.Collaborate with cross-functional teams to define, design, and deliver new features.Participate in code reviews and contribute to engineering best practices.Leverage AI-powered development tools, including GitHub Copilot and other emerging AI technologies, to improve productivity and code quality.Ensure solutions meet performance, reliability, security, and scalability requirements.Contribute throughout the full software development lifecycle.Required QualificationsMinimum 3 years of professional software engineering experience.Bachelor's degree in Computer Science, Engineering, or a related field.Strong hands-on experience with Java and Spring Boot.Experience working with Kafka or similar messaging technologies.Experience with GitLab and modern SDLC practices.Understanding of Docker and Kubernetes.Familiarity with CI/CD pipelines and automated deployment processes.Strong problem-solving skills and attention to detail.Excellent communication skills and ability to work effectively in a collaborative environment.Preferred QualificationsExperience with Argo CD.Knowledge of cloud platforms, particularly AWS.Experience using developer productivity and AI tools such as GitHub Copilot, Claude, Devin, or similar technologies.Previous experience within the financial services sector is an advantage.Familiarity with observability and monitoring tools, including Prometheus, Grafana, and Elastic Stack.Technology StackJavaSpring BootKafkaKubernetesArgo CDGitLab CI/CDPrometheusGrafanaElastic StackIntelliJ IDEAVS CodeGitHub CopilotClaudeDevinAWS (nice to have)What We OfferOpportunity to work on large-scale enterprise systems.Exposure to modern cloud-native and DevOps technologies.Collaborative and highly skilled engineering environment.Professional development and continuous learning opportunities.Access to cutting-edge AI-powered development tools.Long-term career growth within a globally recognized organization.Contract until March 31ts 2027 +potential extension; Salary --> FTE: up to 23.500PLN gross month ; B2B net: up to 190PLN p/h

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Java Backend Engineer (contract until 31-March-2027 + potential extension)