Senior Java Software Engineer

A large-scale, highly complex initiative focused on the development and maintenance of core internal systems. The project ensures seamless communication and integration between various backend components responsible for critical, high-volume travel and transactional operations.

Key Functional Areas:

• 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, develop, test and maintain backend applications using Java and Spring Boot.
• Build and support RESTful APIs and gRPC services.
• Develop solutions deployed on Google Cloud Platform (GCP) and Kubernetes.
• Collaborate with QA, SRE, and Product teams.
• Participate in CI/CD processes, deployments, and production support.
• Provide support during release cycles, including smoke testing, manual validation.
• Troubleshoot issues using logs, metrics, and monitoring tools.
• Conduct code reviews, mentor junior developers, and participate in an on-call rotation.

Requirements:

• 6+ years of experience with Java and Spring Boot.
• Experience building microservices, REST APIs, and gRPC services.
• Hands‑on experience with GCP, Docker, and Kubernetes.
• Knowledge of GitHub, Jenkins, or GitHub Actions.
• Familiarity with monitoring tools such as Prometheus and Stackdriver/Cloud Monitoring.
• Basic scripting skills in Python or Bash.
• Experience with WireMock and performance testing.
• Communicative proficiency in both English and Polish.
• Must possess a legal work permit in Poland.

Benefits:

• 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.