Principal Application Security Software 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.

Team Description

As a Principal Application Security Software Engineer at Sabre, you will play a crucial role in ensuring the security, reliability, and scalability of our highly distributed, fault-tolerant global systems. In this role, you will bridge the gap between advanced software engineering and modern cybersecurity, collaborating closely with cross-functional development teams to design, build, and maintain robust, secure application architectures.

At Sabre, we are passionate about building software that solves complex, real-world problems. We are searching for a senior technical leader with a unique viewpoint, strong engineering roots, and a forward-thinking mindset. You will drive the evolution of our Application Security (AppSec) paradigm—not only by introducing next-generation security scanners and safeguarding our systems against emerging AI-driven threats but also by pioneering the internal use of AI LLM models and autonomous AI agents to transform how we triage vulnerabilities and automate code fixes.

Role and Responsibilities

• Secure Software & Tooling Development: Assist the development teams in planning, designing, and developing secure software solutions, frameworks, and automations, focusing heavily on hands-on Java development to build or enhance application security tools and platforms.

• AI Technology Innovation: Introduce and implement new application security tools leveraging AI LLM technologies to streamline vulnerability triage, automate discovery, and generate autonomous code fixes.

• Threat Adaptation: Evaluate and adapt Sabre’s AppSec strategy to mitigate new vectors and threats stemming from the deployment and utilization of AI LLM models in cybersecurity.

• SDLC Integration & Optimization: Collaborate with development and platform teams to embed advanced security tools, scanners (SAST, DAST, SCA), and compliance checks directly into cloud-based, high-velocity CI/CD pipelines.

• Process Streamlining & Reporting: Define, track, and optimize application security metrics. Streamline procedures to improve reporting accuracy and shorten the time-to-remediation for security findings.

• Technical Leadership & Mentorship: Provide technical guidance, code reviews, and mentorship to development teams to foster high coding standards, secure development practices, and deep security awareness.

• Vulnerability & Incident Management: Participate in security incident response, own application posture improvements, and diagnose complex architectural bottlenecks to ensure optimal system stability and performance.

Qualifications and Education Requirements

• Experience: Minimum 5 years of relevant experience in software engineering and application security engineering.

• Core Engineering Skills: Expert-level knowledge and proven hands-on experience in Java development and framework design within complex, fast-paced Agile environments.

• Advanced SDLC & Automation: Extensive experience operating and designing cloud-based CI/CD pipelines, build tools, and automated workflows to achieve end-to-end security integration.

• AI Agent Proficiency: Deep familiarity and advanced experience utilizing AI Agents at work—including configuring autonomous modes, writing custom instructions, managing specialized agents, and leveraging LLMs to optimize daily engineering tasks.

• Security Architecture: Strong understanding of distributed architectures, cloud environments (e.g., GCP), and modern application vulnerability concepts (OWASP Top 10, LLM Top 10).

• Analytical Skills: Exceptional problem-solving abilities with a proven track record of analyzing complex systems to identify and mitigate critical architectural and security bottlenecks.

• Soft Skills & Collaboration: Proficient English (written and verbal), excellent communication skills, a collaborative mindset, and the ability to influence cross-functional stakeholders effectively.

Nice to Have Qualifications

• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical field / equivalent security certifications (e.g., CISSP, CSSLP, CEH).

• General experience with high-availability, large-scale distributed systems and capacity planning.

• Familiarity with broader machine learning engineering concepts for anomaly detection and predictive maintenance within security operations.

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.

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