Junior Software Systems Engineer

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.

Core Platform is the team that keeps Sabre's engineering machine running. We build and operate the foundational tools that thousands of developers across the company rely on every day — from the moment they scaffold a new service to the moment it goes live in production:

We are a platform team — our customers are internal engineers, and our quality bar is set by how much friction we remove from their daily work.

The Role

As a Software Systems Engineer I on Core Platform, you will help build the tools that power Sabre’s software delivery lifecycle. You will write Java and Python code, enhance CI/CD workflows, evolve NGP Starters and code generators, and contribute to platform services running on GKE. This role is ideal for someone who values developer experience, is eager to learn new things, is ready to take on new challenges, works comfortably at the intersection of tooling and infrastructure, and wants to make an impact across hundreds of engineering teams.

What You'll Work On

• Service templates & scaffolding — add new capabilities to the starter templates and code generators that new services are built from; help keep them aligned with the latest reliability and security standards

• CI/CD pipeline automation — develop and maintain reusable pipeline workflows; build mechanisms that propagate updates to consumer repositories automatically

• Internal platform services — contribute to backend features for service registration, dependency mapping, and deployment tracking

• Deployment pipelines — help maintain and improve deployment automation used by teams across the organization

• Cloud services & automation — develop and operate lightweight cloud utilities that power platform-level operations

• Developer tooling — build scripts and automations that reduce repetitive work for engineers

• AI-assisted platform features — contribute to developer productivity analytics and AI-powered code review infrastructure

What We're Looking For

Required

• Solid fundamentals in at least one object-oriented language (Java with Spring is preferred, but we care more about how you think than which language you know)

• Understanding of version control and collaborative development — branching, pull requests, code review

• Familiarity with CI/CD concepts — what automated build and deployment pipelines do and why they matter

• Curiosity and willingness to learn — platform engineering spans many areas; we will teach you the specifics of our stack

• Problem-solving mindset: when something breaks, you want to understand why

Nice to Have

• Experience with GitHub Actions or another CI/CD platform — reading or writing pipeline configuration

• Go or JavaScript experience (both appear in our tooling)

• Exposure to containerization or cloud-based deployments (Docker, Kubernetes, GCP, AWS)

• Any experience with infrastructure-as-code or build tooling

• Interest in developer productivity metrics or platform engineering as a discipline

• Awareness of AI-assisted development tools

What We Offer

• Multiplier impact — a single improvement to our shared templates or pipelines reaches hundreds of teams and thousands of developers simultaneously

• Deep engineering craft — you will learn how a large-scale software delivery platform actually works: from service scaffolding through CI/CD to production deployment

• Modern, evolving stack — backend services, cloud infrastructure, AI tooling; grounded in enterprise reliability with room to grow into new technologies

• Mentorship — you will work with experienced platform engineers who have built and operated these systems at scale

• Cross-team visibility — Core Platform collaborates with every engineering team at Sabre; you will quickly build a broad understanding of the entire technology estate

• Competitive salary, flexible hybrid model, Kraków office, learning budget

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 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.