Senior Java Software Engineer

System Integration: Facilitating robust and efficient communication between internal microservices and proprietary components. Booking & Ticketing Lifecycle: Supporting core transactional flows, including ticket reservations, refunds, and exchanges. Search & Optimization: Powering backend algorithms designed to find and generate the most optimal flight connections. Financial Calculations: Handling complex pricing engines, fare structures, and diverse cost-assessment calculations. Responsibilities: Design, code, test, and build high-quality enterprise software according to requirements. Leverage AI-assisted development tools to improve coding efficiency, code comprehension, and test generation while maintaining full ownership of decisions. Perform meaningful unit testing and maintain code quality, security, and performance standards. Design, build, deploy, and operate scalable services using Google Cloud Platform (GCP). Collaborate with platform, security, and SRE teams to align solutions with cloud, security, and reliability standards. Support the Technical Product Manager in the preparation and refinement of requirements. Provide input to story prioritization, technical tradeoffs, and participate in estimation and sizing activities. Attend and actively participate in Scrum ceremonies, release planning, and technical reviews. Update status in Rally on a daily basis and continuously work with teams to improve engineering and DevOps practices. Requirements: Minimum 6+ years of professional software development experience Strong expertise in Java / Enterprise Java and Spring Boot (enterprise-grade API design and maintenance). Solid knowledge of Web Services (REST, JSON, XML, SOAP). Experience with Google Cloud Platform (GCP) services (Compute/GKE, networking, security, storage, messaging, and monitoring/observability tools). Familiarity with containerized and cloud-native architectures, including Kubernetes-based deployments. Experience with CI/CD pipelines, build tooling, and cloud-integrated DevOps practices. Demonstrated ability to troubleshoot issues in test and production environments, improving stability and performance. Experience in translating business requirements into technical designs and producing technical documentation (with AI assistance). Familiarity with Agile/Scrum methodologies and shift-left testing approaches. Communicative English and Polish (both written and spoken) suitable for cross-functional collaboration. Must possess a legal work permit in Poland Attractively located office with collaboration spaces Onsite parking space for employees Referral program with financial bonus Life Insurance Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Access to MyBenefit platform (Multisport included) Team Building activities Charity initiatives Working environment promoting diversity and inclusion #J-18808-Ljbffr