Viator, a Tripadvisor company, is the leading marketplace for travel experiences. We believe that making memories is what travel is all about. And with 400,000+ travel experiences to explore—everything from simple tours to extreme adventures (and all the niche, interesting stuff in between)—making memories that will last a lifetime has never been easier. With industry-leading flexibility and last-minute availability, it's never too late to make any day extraordinary. Viator. One app, 400,000+ travel experiences you’ll remember.

We are looking for an experienced Senior Application Security Engineer to join our growing team at Viator. In this role, you will take a lead position in securing the applications that power our platform. As a Senior Engineer, you will design and implement advanced security measures, mentor junior engineers, and play a key role in ensuring the security of our products and infrastructure. This is a fantastic opportunity to influence our security practices and help shape the future of application security within the organisation.

• Viator is a remote-first company. This role is based remotely in Poland / Portugal.
• What You’ll Do:
• Lead the design and implementation of advanced application security measures, including encryption, secure APIs, and identity management.
• Conduct in-depth threat modelling and risk assessments to identify and mitigate potential security risks.
• Performing manual security assessments including code reviews.
• Act as a Subject Matter Expert (SME) for security breaches, including performing root cause analysis and creating corrective actions related to security vulnerabilities.
• Develop and enforce application security policies across multiple engineering teams, ensuring consistency and scalability.
• Mentor and train junior engineers, helping them improve their security knowledge and practices.
• Provide expert advice on security architecture and design for new features and systems.
• Collaborate with engineering and product teams to integrate security requirements into software development lifecycles.
• Champion security initiatives by advocating for prioritisation of security issues and resolution of technical debt.
• Stay up to date with the latest security threats and industry best practices, ensuring that the team remains proactive in its approach to security.
• What You’ll Need:
• Extensive experience in application security, including expertise in secure coding practices, threat modelling, vulnerability assessments, and incident response.
• Hands-on experience with security testing tools (SAST, DAST) and their integration into development pipelines.
• Strong understanding of advanced security concepts such as encryption, secure software design, identity management, and API security.
• Experience with cloud security (AWS, Azure, etc.) and securing microservices architectures.
• Proven leadership skills, with the ability to guide and mentor other engineers and influence security practices across teams.
• Excellent communication and collaboration skills, with a track record of working closely with cross-functional teams to improve security posture.
• 4+ years experience working as a Security Engineer / Application Security Analyst
• Preferred Qualifications:
• Experience with regulatory frameworks (e.g., GDPR, PCI-DSS, SOC 2) and their integration into security processes.
• Industry-recognised security certifications (e.g., OSCP, OSCE, or similar).
• Familiarity with the latest security tools and frameworks to proactively identify vulnerabilities and mitigate threats.
• A passion for mentoring and developing others, with a commitment to continuous learning and improvement.
• Perks of Working at Viator

Competitive compensation packages , including base salary and annual bonus

“Work your way” with flexibility to suit your lifestyle. We take a remote-friendly approach to collaboration, with the option to join on-site as often as you’d like in select locations.

• Flexible schedule . Work-life balance is ingrained in our culture by design. Trust and accountability make it work.
• Donation matching . Give back? Give more! We match qualifying charitable donations annually.
• Tuition assistance . Want to level up your career? We love to hear it! Receive annual support for qualified programs.
• Lifestyle benefit . An annual benefit to spend on yourself. Use it on travel, wellness, or whatever suits you.
• Travel perks . We believe that travel is employee development, so we provide discounts and more.
• Employee assistance program . We’re here for you with resources and programs to help you through life’s challenges.
• Health benefits . We offer great coverage and competitive premiums
• We aspire to lead; We’re relentlessly curious;... want to know more? Read up on our values:
• We aspire to lead . Tap into your talent, ambition, and knowledge to bring us – and you – to new heights.
• We’re relentlessly curious . We push beyond the usual, the known, the “that’s just how it’s done.”
• We’re better together . We learn from, accept, respect, support, and value one another– and are creating something remarkable in the process.
• We serve our customers, always . We listen, question, respond, and strive for wow moments.
• We strive for better, not perfect . We won’t get it right the first time – or every time. We’ll provide a safe environment in which to make mistakes, iterate, improve, and grow.

Our workplace is for everyone , as is our people powered platform. At Tripadvisor, we want you to bring your unique identities, abilities, and experiences, so we can collectively revolutionize travel and together find the good out there. #Viator #LI-AMCVAY