Software Systems Engineer - Java (Mid/Regular or Senior)

Location: Kraków (hybrid work - 3 day per week in the office) We are seeking a Software Systems Engineer to join our global Network Planning team, where innovation knows no borders. Network Planning is a highly sophisticated portfolio of products that helps airlines plan, create, manage and optimize their flight networks. As the industry leader for scheduling and optimization solutions serving 100 airline customers around the world, this team builds complex systems that keep the global travel network connected. With an inclusive culture and flexible work environment, we work together with boldness, curiosity and commitment so we can all win together.

As a Software Systems Engineer, you will drive technical design and execution across a high-scale product suite handling significant domain complexity. You will collaborate across distributed teams, mentor engineers and continuously improve software development processes and system efficiency. This role requires technical depth, constructive problem-solving skills and the ability to guide teams toward reliable, sustainable software architecture.

What You'll Do

• Work with globally distributed teams to discuss, understand, design and implement new functionalities across complex systems.
• Apply optimizations and continuous improvements to product features, technical architecture, development processes and tooling.
• Mentor and provide technical guidance for junior team members to foster technical growth and team cohesion.
• Identify and implement practical ways to incorporate AI into core workflows and systems to accelerate delivery and enhance system capabilities.
• Solve complex technical challenges related to scope, scale and algorithmic performance across large-scale software solutions.
• Drive cross-team alignment to ensure software quality, stability and operational excellence.

What You'll Bring

• 2-6 years of experience in software engineering, with proven expertise leading complex system design and technical initiatives.
• Fluency in Java with solid, hands-on experience across the J2EE platform and Spring framework.
• Familiarity with Google Cloud Platform (GCP) or similar cloud environments.
• Practical hands-on experience using AI, generative AI tools or machine learning capabilities to improve software architecture or developer workflows.
• Demonstrated ability to collaborate constructively across global teams, guide technical decision-making and mentor peers.

Benefits 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 extensive 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
• Life insurance: sign up for free, high coverage life insurance program

Career development

• Professional development: enjoy access to Udemy learning platform 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