Security Engineer II

About Us: At Booking.com, data drives our decisions. Technology is at our core. And innovation is everywhere. But our company is more than datasets, lines of code or A/B tests. We’re the thrill of the first night in a new place. The excitement of the next morning. The friends you encounter. The journeys you take. The sights you see. And the memories you make. Through our products, partners and people, we make it easier for everyone to experience the world.

About the team: Booking.com’s Application Security team is responsible for protecting the world’s largest travel platform against attacks targeting our application stack.

The team develops and maintains the signals, tools, and infrastructure used to secure Booking.com products and defines secure coding practices for all developers. We work closely with product and engineering teams to ensure customer data remains safe through secure-by-design software architecture.

Role Description: As an Application Security Engineer, you will play a key role in safeguarding the security and privacy of Booking.com customers. You will build and operate advanced security tooling, automate remediation, analyze security indicators, and partner with product teams to embed security throughout the software development lifecycle.

Your expertise will directly contribute to the detection, prevention, and response to application security threats across Booking.com’s global platform.

Key Job Responsibilities and Duties

• Provide ongoing technical assistance and application security guidance for new products and technologies used at Booking.com




• Develop, configure, and implement software related to security controls that protect against potential threats




• Build software tools and services for automated security response and remediation




• Develop standards, methodologies, procedures, and documentation for Booking.com’s Software Development Lifecycle (SDLC)




• Conduct application security assessments and source code reviews




• Analyze, assess, and respond to application security threats and incidents




• Partner closely with product and engineering teams to improve security architecture and practices

Role Qualifications and Requirements

• Bachelor’s or Master’s degree in Computer Science or a related field, or equivalent practical experience




• 3+ years of relevant industry experience



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  Strong coding experience for tooling development and security code reviews

  
  

  • Bonus: Java, Perl, JavaScript, Python, or Go

  
  



• Extensive knowledge of web application security and/or mobile security




• Experience analyzing large-scale data sets




• Strong understanding of the Software Development Lifecycle with emphasis on security integration (SAST, DAST, threat modeling, security testing)




• Excellent communication skills; fluent in English (written and spoken)




• Strong team player with a collaborative mindset and commitment to shared success

Benefits & Perks - Global Impact, Personal Relevance:

Booking.com’s Total Rewards Philosophy is not only about compensation but also about benefits. We offer a competitive compensation and benefits package, as well unique-to-Booking.com benefits which include:

• Annual paid time off and generous paid leave scheme including: parent, grandparent, bereavement, and care leave




• Hybrid working including flexible working arrangements, and up to 20 days per year working from abroad (home country)




• Industry leading product discounts - up to 1400 per year - for yourself, including automatic Genius Level 3 status and Booking.com wallet credit 




• Living and working in Amsterdam, one of the most cosmopolitan cities in Europe




• Contributing to a high scale, complex, world renowned product and seeing real-time impact of your work on millions of travelers worldwide




• Working in a fast-paced and performance driven culture




• Opportunity to utilize technical expertise, leadership capabilities and entrepreneurial spirit




• Promote and drive impactful and innovative engineering solutions




• Technical, behavioral and interpersonal competence advancement via on-the-job opportunities, experimental projects, hackathons, conferences and active community participation




• Competitive compensation and benefits package and some great added perks of working in the home city of Booking.com

Diversity, Equity and Inclusion (DEI) at Booking.com: 

Diversity, Equity & Inclusion have been a core part of our company culture since day one. This ongoing journey starts with our very own employees, who represent over 140 nationalities and a wide range of ethnic and social backgrounds, genders and sexual orientations. 

Take it from our Chief People Officer, Paulo Pisano: “At Booking.com, the diversity of our people doesn’t just build an outstanding workplace, it also creates a better and more inclusive travel experience for everyone. Inclusion is at the heart of everything we do. It’s a place where you can make your mark and have a real impact in travel and tech.” 

We ensure that colleagues with disabilities are provided the adjustments and tools they need to participate in the job application and interview process, to perform crucial job functions, and to receive other benefits and privileges of employment.

Application Process: 

• Let’s go places together: How we Hire




• This role does not come with relocation assistance.

 Booking.com is proud to be an equal opportunity workplace and is an affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. We strive to move well beyond traditional equal opportunity and work to create an environment that allows everyone to thrive.

If your application is successful, your personal data may be used for a pre-employment screening check by a third party as permitted by applicable law. Depending on the vacancy and applicable law, a pre-employment screening may include employment history, education and other information (such as media information) that may be necessary for determining your qualifications and suitability for the position.