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Tripadvisor Logo Tripadvisor · IT - Software Development

Senior Cloud Security Engineer

Portugal, Lisbon · Job Posted January 07, 2026
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Job Description

Viator, a Tripadvisor company, is the leading marketplace for travel experiences. We are looking for a hands-on Senior Cloud Security Engineer to be the first line of defense for the Viator platform. This is a critical role that blends proactive security engineering with reactive incident response. You will live and breathe in our product's cloud environment, monitoring for threats, responding to security incidents, automating defenses, and working closely with our engineering teams to build a more resilient platform.

Job Responsibility

  • Monitor, analyze, and investigate security alerts originating from our AWS infrastructure, application logs, and security tooling (WAF, SIEM, Cloud-Native tools)
  • Lead the response to security incidents that directly impact the Viator application
  • Manage and triage vulnerabilities reported through our bug bounty program and other external sources
  • Build and maintain security monitoring and alerting capabilities within our production environment
  • Automate security operations tasks using scripting languages like Python or Go to improve our detection and response times
  • Configure, tune, and manage security tools like our Web Application Firewall (WAF), AWS GuardDuty, and Security Hub
  • Operationalize findings from application security tools (SAST, DAST, SCA) by working with engineering teams to prioritize and remediate vulnerabilities
  • Conduct threat modeling for new features to identify and mitigate risks before they reach production
  • Act as a security subject matter expert for our product and engineering teams, providing guidance on secure coding practices and architecture

Requirements

  • Deep, hands-on experience securing a production environment in AWS
  • Comprehensive understanding of core AWS services beyond just security tools (e.g., VPC networking, EC2, RDS, S3, Lambda, EKS)
  • Strong proficiency with Terraform for managing and securing cloud infrastructure
  • Proven experience managing the full lifecycle of security incidents
  • Proficiency in at least one scripting language (e.g., Python, Go, Bash) to automate security operations and analysis tasks
  • A solid understanding of common web application vulnerabilities (OWASP Top 10) and how to defend against them
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