Software Systems Engineer — Contributor, IX Platform

Powering the agentic revolution in travel. Sabre is an AI-native technology leader, backed by one of the world’s largest travel data clouds. Built on an open, modular, cloud-native architecture, Sabre serves as the backbone for both established leaders and bold, new disruptors, guiding them to the next age of travel retailing through intelligent, connected, and personalized experiences. With AI at its core and operating at unparalleled scale, Sabre transforms insights into innovation, empowering airlines, hoteliers, agencies and other partners to retail, distribute and fulfill travel worldwide.

We are seeking a Systems Engineer — Contributor to join our global IX Platform team, where innovation knows no borders. This team builds and maintains high-scale backend services and cloud-native platform capabilities for enterprise travel and airline technology solutions. As part of a newly created team in Kraków, it delivers foundational microservices, APIs and data flows that power core retailing and fulfillment workflows. With an inclusive culture and flexible work environment, we work together with boldness, curiosity and commitment so we can all win together.

You will focus on hands-on backend development using Java, modern cloud components and microservice architectures. Working under the guidance of senior engineers and architects, you will build, test and maintain production-quality software while expanding your technical skills across distributed systems. You will work on well-defined engineering assignments, gradually increasing your ownership as you build deeper platform and domain expertise. This role requires strong engineering discipline, natural curiosity, clear communication and a drive to build scalable software.

What You'll Do

• Backend Engineering: Develop, test and maintain backend services using Java and modern JDK features following established engineering practices.
• API Development: Build, extend and document RESTful APIs based on defined contracts, technical designs and error-handling standards.
• Microservices Architecture: Contribute to microservice architectures, focusing on service logic, configuration, communication patterns and deployment readiness.
• Cloud Infrastructure: Work with cloud-native technologies within Google Cloud Platform, including containerized services, managed cloud components, logging and deployment pipelines.
• Event-Driven Systems: Implement and maintain messaging and event-driven components using queues, event streams and asynchronous processing.
• Data Persistence: Develop database access logic and write SQL queries across relational and NoSQL databases to support data consistency and performance.
• Testing & Quality: Write unit, integration and component tests, fix defects and actively participate in code reviews to maintain high quality.
• Support & Debugging: Support investigation and debugging of production and integration issues using logs, monitoring tools, API traces and database queries, with guidance from senior team members when needed.
• Cross-Functional Collaboration: Collaborate across senior engineers, QA, Product, Architecture, SRE and Delivery teams to clarify requirements and deliver technical assignments.

Contributor Expectations

• Deliver: Deliver assigned engineering tasks reliably with guidance from senior team members.
• Follow Standards: Follow established architecture, coding standards, testing practices and delivery processes.
• Communicate: Communicate progress, risks and blockers clearly.
• Ask Early: Ask questions early when requirements, designs or technical expectations are unclear.
• Grow Ownership: Gradually build broader platform, domain and operational ownership over time.

What You'll Bring

Required Qualifications

• Practical experience in Java backend development with a solid understanding of core JDK concepts, including collections, streams, concurrency basics and JVM fundamentals.
• Proven experience building or maintaining backend services and REST APIs, including request handling, validation, error handling and authentication basics.
• Solid understanding of microservices concepts, service boundaries, inter-service communication and deployment patterns.
• Familiarity with cloud-native concepts, preferably Google Cloud Platform, including containerized applications, logging, monitoring and CI/CD pipelines.
• Exposure to messaging and event-driven systems such as Kafka, Pub/Sub, JMS or similar tools.
• Working knowledge of relational databases, SQL queries and basic NoSQL concepts.
• Hands-on experience with Git, automated testing, build tools, dependency management and Agile delivery methodologies.
• Strong analytical problem-solving skills and clear written and verbal communication skills.

Preferred Qualifications

• Experience with Spring Boot, Spring Framework or similar Java frameworks.
• Hands-on exposure to GCP services such as GKE, Cloud Run, Pub/Sub, Cloud SQL, BigQuery, Cloud Storage or Cloud Build.
• Experience with Docker, Kubernetes basics, Helm or containerized environments.
• Familiarity with OpenAPI/Swagger, API gateways, OAuth2/OIDC, JWT or enterprise identity integrations.
• Experience with databases such as PostgreSQL, Oracle, MySQL, Redis or Elasticsearch.
• Exposure to CI/CD pipelines, Terraform or infrastructure automation tools.
• Domain experience in travel, airline technology, retailing, booking or high-scale transaction systems.

Work arrangements

• Hybrid working mode; 3 chosen days from the office in a week
• Flexible working hours: Maintain your work-life balance by adjusting your working hours to your needs

Paid time off

• Year-End-Break: enjoy additional fully paid days off during the last week of the year
• Paid parental leave: Take up to 12 weeks off with pay after birth or adoption of a child. Sabre Global Paid Parental Leave runs concurrently with local leave policies.
• Paid volunteer time: take up to 4 days annually to give your time to a charitable organization of your choice

Your money

• My Benefit platform/Multisport card: enjoy the benefit cafeteria system and use popular sport card
• Tax deduction: take the opportunity to claim deductible costs, reducing your income tax
• Employee Capital Plans: profit from long-term saving scheme co-financed by Sabre and the State Treasury
• Baby Bonus: benefit from one-time allowance on childbirth or adoption 
• Say Thanks program: collect points on recognition program and transfer them to wide variety of gifts and services

Health and wellness

• Luxmed VIP medical coverage: take care of yourself and your family with the extensive medical package with a broad range of additional services
• Foreign travel insurance: feel safe going abroad with free Allianz insurance offered as part of our Lux Med package
• Employee Assistance Program: find help in free, confidential program with a certified counselor
• Mindfulness & meditation apps: take care of your mental and physical health
• Life insurance: sign up for free, high coverage life insurance program

Career development

• Professional development: access to e-learning platforms as well as join Sabre live learning sessions
• Certification and tuition reimbursement
• Our Communities: join one of our team member groups focused on sharing knowledge and best practices (Google Developers Group, Innovation Lab Community, Women in Technology, SOLVE!T and many more)

And more

• Car and bike parking 
• Fun & Relax zone in modern office: enjoy electronic tables to work, foosball, ping pong, pool table, swings, massage chairs and terraces to admire a panoramic view of Kraków. We have parents’ rooms as well
• No dress code
• Innovation Lab: access Augmented Reality & Virtual Reality equipment, Robot construction kit, 3D printers and many more
• Attractive Referral Bonus: earn $2500 USD for every hired referral

We will give careful consideration to your application and review your details against the position criteria. You will receive separate notification as we progress your application.

Please note that only candidates who meet the minimum requirements will proceed in the selection process.

Sabre is an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, gender identity, sexual orientation, disability status, protected veteran status or any other characteristic protected by law.